tint: const eval of mix builtin

Bug: tint:1581
Change-Id: I3b9f0ff3a58956616daf17b3d4a922979fc30216
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/113680
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/tint/intrinsics.def

@@ -520,9 +520,9 @@ fn ldexp<N: num, T: f32_f16>(vec<N, T>, vec<N, i32>) -> vec<N, T>
 @const fn max<N: num, T: fia_fiu32_f16>(vec<N, T>, vec<N, T>) -> vec<N, T>
 @const fn min<T: fia_fiu32_f16>(T, T) -> T
 @const fn min<N: num, T: fia_fiu32_f16>(vec<N, T>, vec<N, T>) -> vec<N, T>
-fn mix<T: f32_f16>(T, T, T) -> T
+@const fn mix<T: fa_f32_f16>(T, T, T) -> T
-fn mix<N: num, T: f32_f16>(vec<N, T>, vec<N, T>, vec<N, T>) -> vec<N, T>
+@const fn mix<N: num, T: fa_f32_f16>(vec<N, T>, vec<N, T>, vec<N, T>) -> vec<N, T>
-fn mix<N: num, T: f32_f16>(vec<N, T>, vec<N, T>, T) -> vec<N, T>
+@const fn mix<N: num, T: fa_f32_f16>(vec<N, T>, vec<N, T>, T) -> vec<N, T>
 @const fn modf<T: fa_f32_f16>(@test_value(-1.5) T) -> __modf_result<T>
 @const fn modf<N: num, T: fa_f32_f16>(@test_value(-1.5) vec<N, T>) -> __modf_result_vec<N, T>
 @const fn normalize<N: num, T: fa_f32_f16>(vec<N, T>) -> vec<N, T>

src/tint/resolver/const_eval.cc

@@ -2864,6 +2864,49 @@ ConstEval::Result ConstEval::min(const type::Type* ty,
     return TransformElements(builder, ty, transform, args[0], args[1]);
 }
 
+ConstEval::Result ConstEval::mix(const type::Type* ty,
+                                 utils::VectorRef<const sem::Constant*> args,
+                                 const Source& source) {
+    auto transform = [&](const sem::Constant* c0, const sem::Constant* c1, size_t index) {
+        auto create = [&](auto e1, auto e2) -> ImplResult {
+            using NumberT = decltype(e1);
+            // e3 is either a vector or a scalar
+            NumberT e3;
+            auto* c2 = args[2];
+            if (c2->Type()->Is<type::Vector>()) {
+                e3 = c2->Index(index)->As<NumberT>();
+            } else {
+                e3 = c2->As<NumberT>();
+            }
+            // Implement as `e1 * (1 - e3) + e2 * e3)` instead of as `e1 + e3 * (e2 - e1)` to avoid
+            // float precision loss when e1 and e2 significantly differ in magnitude.
+            auto one_sub_e3 = Sub(source, NumberT{1}, e3);
+            if (!one_sub_e3) {
+                return utils::Failure;
+            }
+            auto e1_mul_one_sub_e3 = Mul(source, e1, one_sub_e3.Get());
+            if (!e1_mul_one_sub_e3) {
+                return utils::Failure;
+            }
+            auto e2_mul_e3 = Mul(source, e2, e3);
+            if (!e2_mul_e3) {
+                return utils::Failure;
+            }
+            auto r = Add(source, e1_mul_one_sub_e3.Get(), e2_mul_e3.Get());
+            if (!r) {
+                return utils::Failure;
+            }
+            return CreateElement(builder, source, c0->Type(), r.Get());
+        };
+        return Dispatch_fa_f32_f16(create, c0, c1);
+    };
+    auto r = TransformElements(builder, ty, transform, args[0], args[1]);
+    if (!r) {
+        AddNote("when calculating mix", source);
+    }
+    return r;
+}
+
 ConstEval::Result ConstEval::modf(const type::Type* ty,
                                   utils::VectorRef<const sem::Constant*> args,
                                   const Source& source) {

src/tint/resolver/const_eval.h

@@ -757,6 +757,15 @@ class ConstEval {
                utils::VectorRef<const sem::Constant*> args,
                const Source& source);
 
+    /// mix builtin
+    /// @param ty the expression type
+    /// @param args the input arguments
+    /// @param source the source location
+    /// @return the result value, or null if the value cannot be calculated
+    Result mix(const type::Type* ty,
+               utils::VectorRef<const sem::Constant*> args,
+               const Source& source);
+
     /// modf builtin
     /// @param ty the expression type
     /// @param args the input arguments

src/tint/resolver/const_eval_builtin_test.cc

@@ -179,7 +179,7 @@ TEST_P(ResolverConstEvalBuiltinTest, Test) {
             CheckConstant(value, expected_case.values[0], expected_case.flags);
         }
     } else {
-        EXPECT_FALSE(r()->Resolve());
+        ASSERT_FALSE(r()->Resolve());
         EXPECT_EQ(r()->error(), c.expected.Failure().error);
     }
 }
@@ -1733,6 +1733,94 @@ INSTANTIATE_TEST_SUITE_P(  //
                                               MinCases<AFloat>(),
                                               MinCases<f32>(),
                                               MinCases<f16>()))));
+
+template <typename T>
+std::vector<Case> MixCases() {
+    auto r = std::vector<Case>{
+        C({T(0), T(1), T(0)}, T(0)),                         //
+        C({T(0), T(1), T(1)}, T(1)),                         //
+        C({T(0), T(1), T(2)}, T(2)),                         //
+        C({T(0), T(1), T::Highest()}, T::Highest()),         //
+        C({T::Lowest(), T::Highest(), T(1)}, T::Highest()),  //
+        C({T::Lowest(), T::Highest(), T(0)}, T::Lowest()),   //
+        C({T(0), T(1), T(0.25)}, T(0.25)),                   //
+        C({T(0), T(1), T(0.5)}, T(0.5)),                     //
+        C({T(0), T(1), T(0.75)}, T(0.75)),                   //
+        C({T(0), T(1000), T(0.25)}, T(250)),                 //
+        C({T(0), T(1000), T(0.5)}, T(500)),                  //
+        C({T(0), T(1000), T(0.75)}, T(750)),                 //
+        // Swap e1 and e2//
+        C({T(1), T(0), T(0)}, T(1)),                         //
+        C({T(1), T(0), T(1)}, T(0)),                         //
+        C({T(1), T(0), T(2)}, T(-1)),                        //
+        C({T::Highest(), T::Lowest(), T(1)}, T::Lowest()),   //
+        C({T::Highest(), T::Lowest(), T(0)}, T::Highest()),  //
+        C({T(1), T(0), T(0.25)}, T(0.75)),                   //
+        C({T(1), T(0), T(0.5)}, T(0.5)),                     //
+        C({T(1), T(0), T(0.75)}, T(0.25)),                   //
+        C({T(1000), T(0), T(0.25)}, T(750)),                 //
+        C({T(1000), T(0), T(0.5)}, T(500)),                  //
+        C({T(1000), T(0), T(0.75)}, T(250)),
+
+        // mix(vec, vec, vec) cases
+        C({Vec(T(0), T(0), T(0)),  //
+           Vec(T(1), T(1), T(1)),  //
+           Vec(T(0), T(1), T(2))},
+          Vec(T(0), T(1), T(2))),
+
+        // mix(vec, vec, scalar) cases
+        C({Vec(T(0), T(1), T(0)),     //
+           Vec(T(1), T(0), T(1000)),  //
+           Val(T(0.25))},
+          Vec(T(0.25), T(0.75), T(250))),
+    };
+    // Can't interpolate lowest value for f16 because (1 - lowest) is not representable as f16.
+    if constexpr (!std::is_same_v<T, f16>) {
+        ConcatInto(r, std::vector<Case>{
+                          C({T(0), T(1), T::Lowest()}, T::Lowest()),
+                          C({T(1), T(0), T::Highest()}, T::Lowest()),
+                      });
+    }
+
+    auto error_msg = [](auto a, const char* op, auto b) {
+        return "12:34 error: " + OverflowErrorMessage(a, op, b) + R"(
+12:34 note: when calculating mix)";
+    };
+    auto kLargeValue = T{T::Highest() / 2};
+    // Test f16 separately as it overflows for a different reason at the boundary inputs.
+    // Specifically, (1 - lowest) fails for f16 because the result is not representable.
+    if constexpr (!std::is_same_v<T, f16>) {
+        ConcatInto(  //
+            r,
+            std::vector<Case>{
+                E({T(0), T::Highest(), T::Highest()}, error_msg(T::Highest(), "*", T::Highest())),
+                E({T(0), T::Lowest(), T::Lowest()}, error_msg(T::Lowest(), "*", T::Lowest())),
+                E({T::Highest(), T(0), T::Lowest()}, error_msg(T::Highest(), "*", T::Highest())),
+                E({-kLargeValue, kLargeValue, T(2)},
+                  error_msg(T{-kLargeValue * T(1 - 2)}, "+", T{kLargeValue * T(2)})),
+            });
+    } else {
+        ConcatInto(  //
+            r,
+            std::vector<Case>{
+                E({T(0), T::Highest(), T::Highest()}, error_msg(T::Highest(), "*", T::Highest())),
+                E({T(0), T::Lowest(), T::Lowest()}, error_msg(T(1), "-", T::Lowest())),
+                E({T::Highest(), T(0), T::Lowest()}, error_msg(T(1), "-", T::Lowest())),
+                E({-kLargeValue, kLargeValue, T(2)},
+                  error_msg(T{-kLargeValue * T(1 - 2)}, "+", T{kLargeValue * T(2)})),
+            });
+    }
+
+    return r;
+}
+INSTANTIATE_TEST_SUITE_P(  //
+    Mix,
+    ResolverConstEvalBuiltinTest,
+    testing::Combine(testing::Values(sem::BuiltinType::kMix),
+                     testing::ValuesIn(Concat(MixCases<AFloat>(),  //
+                                              MixCases<f32>(),     //
+                                              MixCases<f16>()))));
+
 template <typename T>
 std::vector<Case> ModfCases() {
     return {

src/tint/resolver/const_eval_test.h

@@ -101,7 +101,8 @@ inline void CheckConstant(const sem::Constant* got_constant,
             [&](const auto& expected) {
                 using T = std::decay_t<decltype(expected)>;
 
-                ASSERT_TRUE(std::holds_alternative<T>(got_scalar));
+                ASSERT_TRUE(std::holds_alternative<T>(got_scalar))
+                    << "Scalar variant index: " << got_scalar.index();
                 auto got = std::get<T>(got_scalar);
 
                 if constexpr (std::is_same_v<bool, T>) {

src/tint/resolver/intrinsic_table.inl

@@ -11441,36 +11441,36 @@ constexpr OverloadInfo kOverloads[] = {
     /* num parameters */ 3,
     /* num template types */ 1,
     /* num template numbers */ 0,
-    /* template types */ &kTemplateTypes[26],
+    /* template types */ &kTemplateTypes[23],
     /* template numbers */ &kTemplateNumbers[10],
     /* parameters */ &kParameters[468],
     /* return matcher indices */ &kMatcherIndices[3],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::mix,
   },
   {
     /* [263] */
     /* num parameters */ 3,
     /* num template types */ 1,
     /* num template numbers */ 1,
-    /* template types */ &kTemplateTypes[26],
+    /* template types */ &kTemplateTypes[23],
     /* template numbers */ &kTemplateNumbers[4],
     /* parameters */ &kParameters[471],
     /* return matcher indices */ &kMatcherIndices[30],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::mix,
   },
   {
     /* [264] */
     /* num parameters */ 3,
     /* num template types */ 1,
     /* num template numbers */ 1,
-    /* template types */ &kTemplateTypes[26],
+    /* template types */ &kTemplateTypes[23],
     /* template numbers */ &kTemplateNumbers[4],
     /* parameters */ &kParameters[474],
     /* return matcher indices */ &kMatcherIndices[30],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::mix,
   },
   {
     /* [265] */
@@ -14294,9 +14294,9 @@ constexpr IntrinsicInfo kBuiltins[] = {
   },
   {
     /* [52] */
-    /* fn mix<T : f32_f16>(T, T, T) -> T */
+    /* fn mix<T : fa_f32_f16>(T, T, T) -> T */
-    /* fn mix<N : num, T : f32_f16>(vec<N, T>, vec<N, T>, vec<N, T>) -> vec<N, T> */
+    /* fn mix<N : num, T : fa_f32_f16>(vec<N, T>, vec<N, T>, vec<N, T>) -> vec<N, T> */
-    /* fn mix<N : num, T : f32_f16>(vec<N, T>, vec<N, T>, T) -> vec<N, T> */
+    /* fn mix<N : num, T : fa_f32_f16>(vec<N, T>, vec<N, T>, T) -> vec<N, T> */
     /* num overloads */ 3,
     /* overloads */ &kOverloads[262],
   },

src/tint/resolver/intrinsic_table_test.cc

@@ -1483,68 +1483,6 @@ Case::Create<u32V,     u32V,     u32V,     u32V,     u32V,     u32V,     AIntV>(
         // clang-format on
         ));
 
-struct IntrinsicTableAbstractTernaryTest_NonConstEval : public ResolverTestWithParam<Case> {
-    std::unique_ptr<IntrinsicTable> table = IntrinsicTable::Create(*this);
-};
-
-TEST_P(IntrinsicTableAbstractTernaryTest_NonConstEval, MatchMix) {
-    auto* arg_a = GetParam().arg_a(*this);
-    auto* arg_b = GetParam().arg_b(*this);
-    auto* arg_c = GetParam().arg_c(*this);
-    auto builtin = table->Lookup(sem::BuiltinType::kMix, utils::Vector{arg_a, arg_b, arg_c},
-                                 sem::EvaluationStage::kConstant, Source{{12, 34}});
-
-    bool matched = builtin.sem != nullptr;
-    bool expected_match = GetParam().expected_match;
-    EXPECT_EQ(matched, expected_match) << Diagnostics().str();
-
-    auto* result = builtin.sem ? builtin.sem->ReturnType() : nullptr;
-    auto* expected_result = GetParam().expected_result(*this);
-    EXPECT_TYPE(result, expected_result);
-
-    auto* param_a = builtin.sem ? builtin.sem->Parameters()[0]->Type() : nullptr;
-    auto* expected_param_a = GetParam().expected_param_a(*this);
-    EXPECT_TYPE(param_a, expected_param_a);
-
-    auto* param_b = builtin.sem ? builtin.sem->Parameters()[1]->Type() : nullptr;
-    auto* expected_param_b = GetParam().expected_param_b(*this);
-    EXPECT_TYPE(param_b, expected_param_b);
-
-    auto* param_c = builtin.sem ? builtin.sem->Parameters()[2]->Type() : nullptr;
-    auto* expected_param_c = GetParam().expected_param_c(*this);
-    EXPECT_TYPE(param_c, expected_param_c);
-}
-
-INSTANTIATE_TEST_SUITE_P(
-    AFloat_f32,
-    IntrinsicTableAbstractTernaryTest_NonConstEval,
-    testing::Values(  // clang-format off
-                      //           result  | param a | param b | param c |  arg a  |  arg b  |  arg c
-        Case::Create<f32,      f32,      f32,      f32,      AFloat,   AFloat,   AFloat>(),
-        Case::Create<f32,      f32,      f32,      f32,      AFloat,   AFloat,   f32>(),
-        Case::Create<f32,      f32,      f32,      f32,      AFloat,   f32,      AFloat>(),
-        Case::Create<f32,      f32,      f32,      f32,      AFloat,   f32,      f32>(),
-        Case::Create<f32,      f32,      f32,      f32,      f32,      AFloat,   AFloat>(),
-        Case::Create<f32,      f32,      f32,      f32,      f32,      AFloat,   f32>(),
-        Case::Create<f32,      f32,      f32,      f32,      f32,      f32,      AFloat>()
-        // clang-format on
-        ));
-
-INSTANTIATE_TEST_SUITE_P(
-    VecAFloat_Vecf32,
-    IntrinsicTableAbstractTernaryTest_NonConstEval,
-    testing::Values(  // clang-format off
-                      //           result  | param a | param b | param c |  arg a  |  arg b  |  arg c
-        Case::Create<f32V,     f32V,     f32V,     f32V,     AFloatV,  AFloatV,  AFloatV>(),
-        Case::Create<f32V,     f32V,     f32V,     f32V,     AFloatV,  AFloatV,  f32V>(),
-        Case::Create<f32V,     f32V,     f32V,     f32V,     AFloatV,  f32V,     AFloatV>(),
-        Case::Create<f32V,     f32V,     f32V,     f32V,     AFloatV,  f32V,     f32V>(),
-        Case::Create<f32V,     f32V,     f32V,     f32V,     f32V,     AFloatV,  AFloatV>(),
-        Case::Create<f32V,     f32V,     f32V,     f32V,     f32V,     AFloatV,  f32V>(),
-        Case::Create<f32V,     f32V,     f32V,     f32V,     f32V,     f32V,     AFloatV> ()
-        // clang-format on
-        ));
-
 }  // namespace AbstractTernaryTests
 
 }  // namespace

test/tint/bug/chromium/1341475.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 [numthreads(1, 1, 1)]
 void main() {
-  const float a = lerp(1.0f, 1.0f, 1.0f);
+  const float a = 1.0f;
   return;
 }

test/tint/bug/chromium/1341475.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 [numthreads(1, 1, 1)]
 void main() {
-  const float a = lerp(1.0f, 1.0f, 1.0f);
+  const float a = 1.0f;
   return;
 }

test/tint/bug/chromium/1341475.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void tint_symbol() {
-  float a = mix(1.0f, 1.0f, 1.0f);
+  float a = 1.0f;
 }
 
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

test/tint/bug/chromium/1341475.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 kernel void tint_symbol() {
-  float const a = mix(1.0f, 1.0f, 1.0f);
+  float const a = 1.0f;
   return;
 }
 

test/tint/bug/chromium/1341475.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 9
+; Bound: 7
 ; Schema: 0
                OpCapability Shader
-          %7 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint GLCompute %main "main"
                OpExecutionMode %main LocalSize 1 1 1
@@ -15,6 +14,5 @@
     %float_1 = OpConstant %float 1
        %main = OpFunction %void None %1
           %4 = OpLabel
-          %5 = OpExtInst %float %7 FMix %float_1 %float_1 %float_1
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/0c8c33.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_0c8c33() {
-  float3 res = lerp((1.0f).xxx, (1.0f).xxx, (1.0f).xxx);
+  float3 res = (1.0f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/0c8c33.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void mix_0c8c33() {
-  float3 res = lerp((1.0f).xxx, (1.0f).xxx, (1.0f).xxx);
+  float3 res = (1.0f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/0c8c33.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void mix_0c8c33() {
-  vec3 res = mix(vec3(1.0f), vec3(1.0f), vec3(1.0f));
+  vec3 res = vec3(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void mix_0c8c33() {
-  vec3 res = mix(vec3(1.0f), vec3(1.0f), vec3(1.0f));
+  vec3 res = vec3(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void mix_0c8c33() {
-  vec3 res = mix(vec3(1.0f), vec3(1.0f), vec3(1.0f));
+  vec3 res = vec3(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/0c8c33.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_0c8c33() {
-  float3 res = mix(float3(1.0f), float3(1.0f), float3(1.0f));
+  float3 res = float3(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/0c8c33.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 34
+; Bound: 32
 ; Schema: 0
                OpCapability Shader
-         %15 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -33,36 +32,35 @@
           %9 = OpTypeFunction %void
     %v3float = OpTypeVector %float 3
     %float_1 = OpConstant %float 1
-         %17 = OpConstantComposite %v3float %float_1 %float_1 %float_1
+         %15 = OpConstantComposite %v3float %float_1 %float_1 %float_1
 %_ptr_Function_v3float = OpTypePointer Function %v3float
-         %20 = OpConstantNull %v3float
+         %18 = OpConstantNull %v3float
-         %21 = OpTypeFunction %v4float
+         %19 = OpTypeFunction %v4float
  %mix_0c8c33 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v3float Function %20
+        %res = OpVariable %_ptr_Function_v3float Function %18
-         %13 = OpExtInst %v3float %15 FMix %17 %17 %17
+               OpStore %res %15
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %21
+%vertex_main_inner = OpFunction %v4float None %19
-         %23 = OpLabel
+         %21 = OpLabel
-         %24 = OpFunctionCall %void %mix_0c8c33
+         %22 = OpFunctionCall %void %mix_0c8c33
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %26 = OpLabel
+         %24 = OpLabel
-         %27 = OpFunctionCall %v4float %vertex_main_inner
+         %25 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %27
+               OpStore %value %25
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %29 = OpLabel
+         %27 = OpLabel
-         %30 = OpFunctionCall %void %mix_0c8c33
+         %28 = OpFunctionCall %void %mix_0c8c33
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %mix_0c8c33
+         %31 = OpFunctionCall %void %mix_0c8c33
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/1faeb1.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_1faeb1() {
-  float4 res = lerp((1.0f).xxxx, (1.0f).xxxx, 1.0f);
+  float4 res = (1.0f).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/1faeb1.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void mix_1faeb1() {
-  float4 res = lerp((1.0f).xxxx, (1.0f).xxxx, 1.0f);
+  float4 res = (1.0f).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/1faeb1.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void mix_1faeb1() {
-  vec4 res = mix(vec4(1.0f), vec4(1.0f), 1.0f);
+  vec4 res = vec4(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void mix_1faeb1() {
-  vec4 res = mix(vec4(1.0f), vec4(1.0f), 1.0f);
+  vec4 res = vec4(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void mix_1faeb1() {
-  vec4 res = mix(vec4(1.0f), vec4(1.0f), 1.0f);
+  vec4 res = vec4(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/1faeb1.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_1faeb1() {
-  float4 res = mix(float4(1.0f), float4(1.0f), 1.0f);
+  float4 res = float4(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/1faeb1.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 34
+; Bound: 30
 ; Schema: 0
                OpCapability Shader
-         %14 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -32,37 +31,34 @@
        %void = OpTypeVoid
           %9 = OpTypeFunction %void
     %float_1 = OpConstant %float 1
-         %16 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
+         %14 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
 %_ptr_Function_v4float = OpTypePointer Function %v4float
-         %21 = OpTypeFunction %v4float
+         %17 = OpTypeFunction %v4float
  %mix_1faeb1 = OpFunction %void None %9
          %12 = OpLabel
-         %17 = OpVariable %_ptr_Function_v4float Function %5
         %res = OpVariable %_ptr_Function_v4float Function %5
-         %19 = OpCompositeConstruct %v4float %float_1 %float_1 %float_1 %float_1
+               OpStore %res %14
-         %13 = OpExtInst %v4float %14 FMix %16 %16 %19
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %21
+%vertex_main_inner = OpFunction %v4float None %17
-         %23 = OpLabel
+         %19 = OpLabel
-         %24 = OpFunctionCall %void %mix_1faeb1
+         %20 = OpFunctionCall %void %mix_1faeb1
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %26 = OpLabel
+         %22 = OpLabel
-         %27 = OpFunctionCall %v4float %vertex_main_inner
+         %23 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %27
+               OpStore %value %23
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %29 = OpLabel
+         %25 = OpLabel
-         %30 = OpFunctionCall %void %mix_1faeb1
+         %26 = OpFunctionCall %void %mix_1faeb1
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %28 = OpLabel
-         %33 = OpFunctionCall %void %mix_1faeb1
+         %29 = OpFunctionCall %void %mix_1faeb1
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/275cac.wgsl

@@ -0,0 +1,43 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+////////////////////////////////////////////////////////////////////////////////
+// File generated by tools/src/cmd/gen
+// using the template:
+//   test/tint/builtins/gen/gen.wgsl.tmpl
+//
+// Do not modify this file directly
+////////////////////////////////////////////////////////////////////////////////
+
+
+// fn mix(vec<4, fa>, vec<4, fa>, fa) -> vec<4, fa>
+fn mix_275cac() {
+  var res = mix(vec4(1.), vec4(1.), 1.);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_275cac();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_275cac();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_275cac();
+}

test/tint/builtins/gen/literal/mix/275cac.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void mix_275cac() {
+  float4 res = (1.0f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_275cac();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_275cac();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_275cac();
+  return;
+}

test/tint/builtins/gen/literal/mix/275cac.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void mix_275cac() {
+  float4 res = (1.0f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_275cac();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_275cac();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_275cac();
+  return;
+}

test/tint/builtins/gen/literal/mix/275cac.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void mix_275cac() {
+  vec4 res = vec4(1.0f);
+}
+
+vec4 vertex_main() {
+  mix_275cac();
+  return vec4(0.0f);
+}
+
+void main() {
+  gl_PointSize = 1.0;
+  vec4 inner_result = vertex_main();
+  gl_Position = inner_result;
+  gl_Position.y = -(gl_Position.y);
+  gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
+  return;
+}
+#version 310 es
+precision mediump float;
+
+void mix_275cac() {
+  vec4 res = vec4(1.0f);
+}
+
+void fragment_main() {
+  mix_275cac();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void mix_275cac() {
+  vec4 res = vec4(1.0f);
+}
+
+void compute_main() {
+  mix_275cac();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/mix/275cac.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void mix_275cac() {
+  float4 res = float4(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  mix_275cac();
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+  float4 const inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main() {
+  mix_275cac();
+  return;
+}
+
+kernel void compute_main() {
+  mix_275cac();
+  return;
+}
+

test/tint/builtins/gen/literal/mix/275cac.wgsl.expected.spvasm

@@ -0,0 +1,64 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 30
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+               OpEntryPoint Fragment %fragment_main "fragment_main"
+               OpEntryPoint GLCompute %compute_main "compute_main"
+               OpExecutionMode %fragment_main OriginUpperLeft
+               OpExecutionMode %compute_main LocalSize 1 1 1
+               OpName %value "value"
+               OpName %vertex_point_size "vertex_point_size"
+               OpName %mix_275cac "mix_275cac"
+               OpName %res "res"
+               OpName %vertex_main_inner "vertex_main_inner"
+               OpName %vertex_main "vertex_main"
+               OpName %fragment_main "fragment_main"
+               OpName %compute_main "compute_main"
+               OpDecorate %value BuiltIn Position
+               OpDecorate %vertex_point_size BuiltIn PointSize
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+          %5 = OpConstantNull %v4float
+      %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+          %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+       %void = OpTypeVoid
+          %9 = OpTypeFunction %void
+    %float_1 = OpConstant %float 1
+         %14 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
+%_ptr_Function_v4float = OpTypePointer Function %v4float
+         %17 = OpTypeFunction %v4float
+ %mix_275cac = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_v4float Function %5
+               OpStore %res %14
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %17
+         %19 = OpLabel
+         %20 = OpFunctionCall %void %mix_275cac
+               OpReturnValue %5
+               OpFunctionEnd
+%vertex_main = OpFunction %void None %9
+         %22 = OpLabel
+         %23 = OpFunctionCall %v4float %vertex_main_inner
+               OpStore %value %23
+               OpStore %vertex_point_size %float_1
+               OpReturn
+               OpFunctionEnd
+%fragment_main = OpFunction %void None %9
+         %25 = OpLabel
+         %26 = OpFunctionCall %void %mix_275cac
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %mix_275cac
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/mix/275cac.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn mix_275cac() {
+  var res = mix(vec4(1.0), vec4(1.0), 1.0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_275cac();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_275cac();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_275cac();
+}

test/tint/builtins/gen/literal/mix/2fadab.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_2fadab() {
-  float2 res = lerp((1.0f).xx, (1.0f).xx, 1.0f);
+  float2 res = (1.0f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/2fadab.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void mix_2fadab() {
-  float2 res = lerp((1.0f).xx, (1.0f).xx, 1.0f);
+  float2 res = (1.0f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/2fadab.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void mix_2fadab() {
-  vec2 res = mix(vec2(1.0f), vec2(1.0f), 1.0f);
+  vec2 res = vec2(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void mix_2fadab() {
-  vec2 res = mix(vec2(1.0f), vec2(1.0f), 1.0f);
+  vec2 res = vec2(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void mix_2fadab() {
-  vec2 res = mix(vec2(1.0f), vec2(1.0f), 1.0f);
+  vec2 res = vec2(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/2fadab.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_2fadab() {
-  float2 res = mix(float2(1.0f), float2(1.0f), 1.0f);
+  float2 res = float2(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/2fadab.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 36
+; Bound: 32
 ; Schema: 0
                OpCapability Shader
-         %15 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -33,38 +32,35 @@
           %9 = OpTypeFunction %void
     %v2float = OpTypeVector %float 2
     %float_1 = OpConstant %float 1
-         %17 = OpConstantComposite %v2float %float_1 %float_1
+         %15 = OpConstantComposite %v2float %float_1 %float_1
 %_ptr_Function_v2float = OpTypePointer Function %v2float
-         %20 = OpConstantNull %v2float
+         %18 = OpConstantNull %v2float
-         %23 = OpTypeFunction %v4float
+         %19 = OpTypeFunction %v4float
  %mix_2fadab = OpFunction %void None %9
          %12 = OpLabel
-         %18 = OpVariable %_ptr_Function_v2float Function %20
+        %res = OpVariable %_ptr_Function_v2float Function %18
-        %res = OpVariable %_ptr_Function_v2float Function %20
+               OpStore %res %15
-         %21 = OpCompositeConstruct %v2float %float_1 %float_1
-         %13 = OpExtInst %v2float %15 FMix %17 %17 %21
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %23
+%vertex_main_inner = OpFunction %v4float None %19
-         %25 = OpLabel
+         %21 = OpLabel
-         %26 = OpFunctionCall %void %mix_2fadab
+         %22 = OpFunctionCall %void %mix_2fadab
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %28 = OpLabel
+         %24 = OpLabel
-         %29 = OpFunctionCall %v4float %vertex_main_inner
+         %25 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %29
+               OpStore %value %25
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %31 = OpLabel
+         %27 = OpLabel
-         %32 = OpFunctionCall %void %mix_2fadab
+         %28 = OpFunctionCall %void %mix_2fadab
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %30 = OpLabel
-         %35 = OpFunctionCall %void %mix_2fadab
+         %31 = OpFunctionCall %void %mix_2fadab
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/30de36.wgsl

@@ -0,0 +1,43 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+////////////////////////////////////////////////////////////////////////////////
+// File generated by tools/src/cmd/gen
+// using the template:
+//   test/tint/builtins/gen/gen.wgsl.tmpl
+//
+// Do not modify this file directly
+////////////////////////////////////////////////////////////////////////////////
+
+
+// fn mix(fa, fa, fa) -> fa
+fn mix_30de36() {
+  var res = mix(1., 1., 1.);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_30de36();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_30de36();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_30de36();
+}

test/tint/builtins/gen/literal/mix/30de36.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void mix_30de36() {
+  float res = 1.0f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_30de36();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_30de36();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_30de36();
+  return;
+}

test/tint/builtins/gen/literal/mix/30de36.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void mix_30de36() {
+  float res = 1.0f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_30de36();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_30de36();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_30de36();
+  return;
+}

test/tint/builtins/gen/literal/mix/30de36.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void mix_30de36() {
+  float res = 1.0f;
+}
+
+vec4 vertex_main() {
+  mix_30de36();
+  return vec4(0.0f);
+}
+
+void main() {
+  gl_PointSize = 1.0;
+  vec4 inner_result = vertex_main();
+  gl_Position = inner_result;
+  gl_Position.y = -(gl_Position.y);
+  gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
+  return;
+}
+#version 310 es
+precision mediump float;
+
+void mix_30de36() {
+  float res = 1.0f;
+}
+
+void fragment_main() {
+  mix_30de36();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void mix_30de36() {
+  float res = 1.0f;
+}
+
+void compute_main() {
+  mix_30de36();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/mix/30de36.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void mix_30de36() {
+  float res = 1.0f;
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  mix_30de36();
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+  float4 const inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main() {
+  mix_30de36();
+  return;
+}
+
+kernel void compute_main() {
+  mix_30de36();
+  return;
+}
+

test/tint/builtins/gen/literal/mix/30de36.wgsl.expected.spvasm

@@ -0,0 +1,63 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 29
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+               OpEntryPoint Fragment %fragment_main "fragment_main"
+               OpEntryPoint GLCompute %compute_main "compute_main"
+               OpExecutionMode %fragment_main OriginUpperLeft
+               OpExecutionMode %compute_main LocalSize 1 1 1
+               OpName %value "value"
+               OpName %vertex_point_size "vertex_point_size"
+               OpName %mix_30de36 "mix_30de36"
+               OpName %res "res"
+               OpName %vertex_main_inner "vertex_main_inner"
+               OpName %vertex_main "vertex_main"
+               OpName %fragment_main "fragment_main"
+               OpName %compute_main "compute_main"
+               OpDecorate %value BuiltIn Position
+               OpDecorate %vertex_point_size BuiltIn PointSize
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+          %5 = OpConstantNull %v4float
+      %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+          %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+       %void = OpTypeVoid
+          %9 = OpTypeFunction %void
+    %float_1 = OpConstant %float 1
+%_ptr_Function_float = OpTypePointer Function %float
+         %16 = OpTypeFunction %v4float
+ %mix_30de36 = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_float Function %8
+               OpStore %res %float_1
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %16
+         %18 = OpLabel
+         %19 = OpFunctionCall %void %mix_30de36
+               OpReturnValue %5
+               OpFunctionEnd
+%vertex_main = OpFunction %void None %9
+         %21 = OpLabel
+         %22 = OpFunctionCall %v4float %vertex_main_inner
+               OpStore %value %22
+               OpStore %vertex_point_size %float_1
+               OpReturn
+               OpFunctionEnd
+%fragment_main = OpFunction %void None %9
+         %24 = OpLabel
+         %25 = OpFunctionCall %void %mix_30de36
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %27 = OpLabel
+         %28 = OpFunctionCall %void %mix_30de36
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/mix/30de36.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn mix_30de36() {
+  var res = mix(1.0, 1.0, 1.0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_30de36();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_30de36();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_30de36();
+}

test/tint/builtins/gen/literal/mix/315264.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_315264() {
-  float3 res = lerp((1.0f).xxx, (1.0f).xxx, 1.0f);
+  float3 res = (1.0f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/315264.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void mix_315264() {
-  float3 res = lerp((1.0f).xxx, (1.0f).xxx, 1.0f);
+  float3 res = (1.0f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/315264.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void mix_315264() {
-  vec3 res = mix(vec3(1.0f), vec3(1.0f), 1.0f);
+  vec3 res = vec3(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void mix_315264() {
-  vec3 res = mix(vec3(1.0f), vec3(1.0f), 1.0f);
+  vec3 res = vec3(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void mix_315264() {
-  vec3 res = mix(vec3(1.0f), vec3(1.0f), 1.0f);
+  vec3 res = vec3(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/315264.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_315264() {
-  float3 res = mix(float3(1.0f), float3(1.0f), 1.0f);
+  float3 res = float3(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/315264.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 36
+; Bound: 32
 ; Schema: 0
                OpCapability Shader
-         %15 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -33,38 +32,35 @@
           %9 = OpTypeFunction %void
     %v3float = OpTypeVector %float 3
     %float_1 = OpConstant %float 1
-         %17 = OpConstantComposite %v3float %float_1 %float_1 %float_1
+         %15 = OpConstantComposite %v3float %float_1 %float_1 %float_1
 %_ptr_Function_v3float = OpTypePointer Function %v3float
-         %20 = OpConstantNull %v3float
+         %18 = OpConstantNull %v3float
-         %23 = OpTypeFunction %v4float
+         %19 = OpTypeFunction %v4float
  %mix_315264 = OpFunction %void None %9
          %12 = OpLabel
-         %18 = OpVariable %_ptr_Function_v3float Function %20
+        %res = OpVariable %_ptr_Function_v3float Function %18
-        %res = OpVariable %_ptr_Function_v3float Function %20
+               OpStore %res %15
-         %21 = OpCompositeConstruct %v3float %float_1 %float_1 %float_1
-         %13 = OpExtInst %v3float %15 FMix %17 %17 %21
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %23
+%vertex_main_inner = OpFunction %v4float None %19
-         %25 = OpLabel
+         %21 = OpLabel
-         %26 = OpFunctionCall %void %mix_315264
+         %22 = OpFunctionCall %void %mix_315264
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %28 = OpLabel
+         %24 = OpLabel
-         %29 = OpFunctionCall %v4float %vertex_main_inner
+         %25 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %29
+               OpStore %value %25
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %31 = OpLabel
+         %27 = OpLabel
-         %32 = OpFunctionCall %void %mix_315264
+         %28 = OpFunctionCall %void %mix_315264
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %30 = OpLabel
-         %35 = OpFunctionCall %void %mix_315264
+         %31 = OpFunctionCall %void %mix_315264
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/343c49.wgsl

@@ -0,0 +1,43 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+////////////////////////////////////////////////////////////////////////////////
+// File generated by tools/src/cmd/gen
+// using the template:
+//   test/tint/builtins/gen/gen.wgsl.tmpl
+//
+// Do not modify this file directly
+////////////////////////////////////////////////////////////////////////////////
+
+
+// fn mix(vec<3, fa>, vec<3, fa>, vec<3, fa>) -> vec<3, fa>
+fn mix_343c49() {
+  var res = mix(vec3(1.), vec3(1.), vec3(1.));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_343c49();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_343c49();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_343c49();
+}

test/tint/builtins/gen/literal/mix/343c49.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void mix_343c49() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_343c49();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_343c49();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_343c49();
+  return;
+}

test/tint/builtins/gen/literal/mix/343c49.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void mix_343c49() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_343c49();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_343c49();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_343c49();
+  return;
+}

test/tint/builtins/gen/literal/mix/343c49.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void mix_343c49() {
+  vec3 res = vec3(1.0f);
+}
+
+vec4 vertex_main() {
+  mix_343c49();
+  return vec4(0.0f);
+}
+
+void main() {
+  gl_PointSize = 1.0;
+  vec4 inner_result = vertex_main();
+  gl_Position = inner_result;
+  gl_Position.y = -(gl_Position.y);
+  gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
+  return;
+}
+#version 310 es
+precision mediump float;
+
+void mix_343c49() {
+  vec3 res = vec3(1.0f);
+}
+
+void fragment_main() {
+  mix_343c49();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void mix_343c49() {
+  vec3 res = vec3(1.0f);
+}
+
+void compute_main() {
+  mix_343c49();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/mix/343c49.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void mix_343c49() {
+  float3 res = float3(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  mix_343c49();
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+  float4 const inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main() {
+  mix_343c49();
+  return;
+}
+
+kernel void compute_main() {
+  mix_343c49();
+  return;
+}
+

test/tint/builtins/gen/literal/mix/343c49.wgsl.expected.spvasm

@@ -0,0 +1,66 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 32
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+               OpEntryPoint Fragment %fragment_main "fragment_main"
+               OpEntryPoint GLCompute %compute_main "compute_main"
+               OpExecutionMode %fragment_main OriginUpperLeft
+               OpExecutionMode %compute_main LocalSize 1 1 1
+               OpName %value "value"
+               OpName %vertex_point_size "vertex_point_size"
+               OpName %mix_343c49 "mix_343c49"
+               OpName %res "res"
+               OpName %vertex_main_inner "vertex_main_inner"
+               OpName %vertex_main "vertex_main"
+               OpName %fragment_main "fragment_main"
+               OpName %compute_main "compute_main"
+               OpDecorate %value BuiltIn Position
+               OpDecorate %vertex_point_size BuiltIn PointSize
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+          %5 = OpConstantNull %v4float
+      %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+          %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+       %void = OpTypeVoid
+          %9 = OpTypeFunction %void
+    %v3float = OpTypeVector %float 3
+    %float_1 = OpConstant %float 1
+         %15 = OpConstantComposite %v3float %float_1 %float_1 %float_1
+%_ptr_Function_v3float = OpTypePointer Function %v3float
+         %18 = OpConstantNull %v3float
+         %19 = OpTypeFunction %v4float
+ %mix_343c49 = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_v3float Function %18
+               OpStore %res %15
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %19
+         %21 = OpLabel
+         %22 = OpFunctionCall %void %mix_343c49
+               OpReturnValue %5
+               OpFunctionEnd
+%vertex_main = OpFunction %void None %9
+         %24 = OpLabel
+         %25 = OpFunctionCall %v4float %vertex_main_inner
+               OpStore %value %25
+               OpStore %vertex_point_size %float_1
+               OpReturn
+               OpFunctionEnd
+%fragment_main = OpFunction %void None %9
+         %27 = OpLabel
+         %28 = OpFunctionCall %void %mix_343c49
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %30 = OpLabel
+         %31 = OpFunctionCall %void %mix_343c49
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/mix/343c49.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn mix_343c49() {
+  var res = mix(vec3(1.0), vec3(1.0), vec3(1.0));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_343c49();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_343c49();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_343c49();
+}

test/tint/builtins/gen/literal/mix/38cbbb.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_38cbbb() {
-  float16_t res = lerp(float16_t(1.0h), float16_t(1.0h), float16_t(1.0h));
+  float16_t res = float16_t(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/38cbbb.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_38cbbb() {
-  float16_t res = mix(1.0hf, 1.0hf, 1.0hf);
+  float16_t res = 1.0hf;
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void mix_38cbbb() {
-  float16_t res = mix(1.0hf, 1.0hf, 1.0hf);
+  float16_t res = 1.0hf;
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_38cbbb() {
-  float16_t res = mix(1.0hf, 1.0hf, 1.0hf);
+  float16_t res = 1.0hf;
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/38cbbb.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_38cbbb() {
-  half res = mix(1.0h, 1.0h, 1.0h);
+  half res = 1.0h;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/38cbbb.wgsl.expected.spvasm

@@ -1,14 +1,13 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 34
+; Bound: 32
 ; Schema: 0
                OpCapability Shader
                OpCapability Float16
                OpCapability UniformAndStorageBuffer16BitAccess
                OpCapability StorageBuffer16BitAccess
                OpCapability StorageInputOutput16
-         %15 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -38,35 +37,34 @@
        %half = OpTypeFloat 16
 %half_0x1p_0 = OpConstant %half 0x1p+0
 %_ptr_Function_half = OpTypePointer Function %half
-         %19 = OpConstantNull %half
+         %17 = OpConstantNull %half
-         %20 = OpTypeFunction %v4float
+         %18 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
  %mix_38cbbb = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_half Function %19
+        %res = OpVariable %_ptr_Function_half Function %17
-         %13 = OpExtInst %half %15 FMix %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+               OpStore %res %half_0x1p_0
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %20
+%vertex_main_inner = OpFunction %v4float None %18
-         %22 = OpLabel
+         %20 = OpLabel
-         %23 = OpFunctionCall %void %mix_38cbbb
+         %21 = OpFunctionCall %void %mix_38cbbb
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %25 = OpLabel
+         %23 = OpLabel
-         %26 = OpFunctionCall %v4float %vertex_main_inner
+         %24 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %26
+               OpStore %value %24
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %29 = OpLabel
+         %27 = OpLabel
-         %30 = OpFunctionCall %void %mix_38cbbb
+         %28 = OpFunctionCall %void %mix_38cbbb
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %mix_38cbbb
+         %31 = OpFunctionCall %void %mix_38cbbb
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/42d11d.wgsl

@@ -0,0 +1,43 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+////////////////////////////////////////////////////////////////////////////////
+// File generated by tools/src/cmd/gen
+// using the template:
+//   test/tint/builtins/gen/gen.wgsl.tmpl
+//
+// Do not modify this file directly
+////////////////////////////////////////////////////////////////////////////////
+
+
+// fn mix(vec<2, fa>, vec<2, fa>, fa) -> vec<2, fa>
+fn mix_42d11d() {
+  var res = mix(vec2(1.), vec2(1.), 1.);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_42d11d();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_42d11d();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_42d11d();
+}

test/tint/builtins/gen/literal/mix/42d11d.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void mix_42d11d() {
+  float2 res = (1.0f).xx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_42d11d();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_42d11d();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_42d11d();
+  return;
+}

test/tint/builtins/gen/literal/mix/42d11d.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void mix_42d11d() {
+  float2 res = (1.0f).xx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_42d11d();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_42d11d();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_42d11d();
+  return;
+}

test/tint/builtins/gen/literal/mix/42d11d.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void mix_42d11d() {
+  vec2 res = vec2(1.0f);
+}
+
+vec4 vertex_main() {
+  mix_42d11d();
+  return vec4(0.0f);
+}
+
+void main() {
+  gl_PointSize = 1.0;
+  vec4 inner_result = vertex_main();
+  gl_Position = inner_result;
+  gl_Position.y = -(gl_Position.y);
+  gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
+  return;
+}
+#version 310 es
+precision mediump float;
+
+void mix_42d11d() {
+  vec2 res = vec2(1.0f);
+}
+
+void fragment_main() {
+  mix_42d11d();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void mix_42d11d() {
+  vec2 res = vec2(1.0f);
+}
+
+void compute_main() {
+  mix_42d11d();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/mix/42d11d.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void mix_42d11d() {
+  float2 res = float2(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  mix_42d11d();
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+  float4 const inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main() {
+  mix_42d11d();
+  return;
+}
+
+kernel void compute_main() {
+  mix_42d11d();
+  return;
+}
+

test/tint/builtins/gen/literal/mix/42d11d.wgsl.expected.spvasm

@@ -0,0 +1,66 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 32
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+               OpEntryPoint Fragment %fragment_main "fragment_main"
+               OpEntryPoint GLCompute %compute_main "compute_main"
+               OpExecutionMode %fragment_main OriginUpperLeft
+               OpExecutionMode %compute_main LocalSize 1 1 1
+               OpName %value "value"
+               OpName %vertex_point_size "vertex_point_size"
+               OpName %mix_42d11d "mix_42d11d"
+               OpName %res "res"
+               OpName %vertex_main_inner "vertex_main_inner"
+               OpName %vertex_main "vertex_main"
+               OpName %fragment_main "fragment_main"
+               OpName %compute_main "compute_main"
+               OpDecorate %value BuiltIn Position
+               OpDecorate %vertex_point_size BuiltIn PointSize
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+          %5 = OpConstantNull %v4float
+      %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+          %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+       %void = OpTypeVoid
+          %9 = OpTypeFunction %void
+    %v2float = OpTypeVector %float 2
+    %float_1 = OpConstant %float 1
+         %15 = OpConstantComposite %v2float %float_1 %float_1
+%_ptr_Function_v2float = OpTypePointer Function %v2float
+         %18 = OpConstantNull %v2float
+         %19 = OpTypeFunction %v4float
+ %mix_42d11d = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_v2float Function %18
+               OpStore %res %15
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %19
+         %21 = OpLabel
+         %22 = OpFunctionCall %void %mix_42d11d
+               OpReturnValue %5
+               OpFunctionEnd
+%vertex_main = OpFunction %void None %9
+         %24 = OpLabel
+         %25 = OpFunctionCall %v4float %vertex_main_inner
+               OpStore %value %25
+               OpStore %vertex_point_size %float_1
+               OpReturn
+               OpFunctionEnd
+%fragment_main = OpFunction %void None %9
+         %27 = OpLabel
+         %28 = OpFunctionCall %void %mix_42d11d
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %30 = OpLabel
+         %31 = OpFunctionCall %void %mix_42d11d
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/mix/42d11d.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn mix_42d11d() {
+  var res = mix(vec2(1.0), vec2(1.0), 1.0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_42d11d();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_42d11d();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_42d11d();
+}

test/tint/builtins/gen/literal/mix/4f0b5e.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_4f0b5e() {
-  float res = lerp(1.0f, 1.0f, 1.0f);
+  float res = 1.0f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/4f0b5e.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void mix_4f0b5e() {
-  float res = lerp(1.0f, 1.0f, 1.0f);
+  float res = 1.0f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/4f0b5e.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void mix_4f0b5e() {
-  float res = mix(1.0f, 1.0f, 1.0f);
+  float res = 1.0f;
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void mix_4f0b5e() {
-  float res = mix(1.0f, 1.0f, 1.0f);
+  float res = 1.0f;
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void mix_4f0b5e() {
-  float res = mix(1.0f, 1.0f, 1.0f);
+  float res = 1.0f;
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/4f0b5e.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_4f0b5e() {
-  float res = mix(1.0f, 1.0f, 1.0f);
+  float res = 1.0f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/4f0b5e.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 31
+; Bound: 29
 ; Schema: 0
                OpCapability Shader
-         %14 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -33,33 +32,32 @@
           %9 = OpTypeFunction %void
     %float_1 = OpConstant %float 1
 %_ptr_Function_float = OpTypePointer Function %float
-         %18 = OpTypeFunction %v4float
+         %16 = OpTypeFunction %v4float
  %mix_4f0b5e = OpFunction %void None %9
          %12 = OpLabel
         %res = OpVariable %_ptr_Function_float Function %8
-         %13 = OpExtInst %float %14 FMix %float_1 %float_1 %float_1
+               OpStore %res %float_1
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %18
+%vertex_main_inner = OpFunction %v4float None %16
-         %20 = OpLabel
+         %18 = OpLabel
-         %21 = OpFunctionCall %void %mix_4f0b5e
+         %19 = OpFunctionCall %void %mix_4f0b5e
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %23 = OpLabel
+         %21 = OpLabel
-         %24 = OpFunctionCall %v4float %vertex_main_inner
+         %22 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %24
+               OpStore %value %22
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %26 = OpLabel
+         %24 = OpLabel
-         %27 = OpFunctionCall %void %mix_4f0b5e
+         %25 = OpFunctionCall %void %mix_4f0b5e
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %29 = OpLabel
+         %27 = OpLabel
-         %30 = OpFunctionCall %void %mix_4f0b5e
+         %28 = OpFunctionCall %void %mix_4f0b5e
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/63f2fd.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_63f2fd() {
-  vector<float16_t, 3> res = lerp((float16_t(1.0h)).xxx, (float16_t(1.0h)).xxx, (float16_t(1.0h)).xxx);
+  vector<float16_t, 3> res = (float16_t(1.0h)).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/63f2fd.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_63f2fd() {
-  f16vec3 res = mix(f16vec3(1.0hf), f16vec3(1.0hf), f16vec3(1.0hf));
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void mix_63f2fd() {
-  f16vec3 res = mix(f16vec3(1.0hf), f16vec3(1.0hf), f16vec3(1.0hf));
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_63f2fd() {
-  f16vec3 res = mix(f16vec3(1.0hf), f16vec3(1.0hf), f16vec3(1.0hf));
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/63f2fd.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_63f2fd() {
-  half3 res = mix(half3(1.0h), half3(1.0h), half3(1.0h));
+  half3 res = half3(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/63f2fd.wgsl.expected.spvasm

@@ -1,14 +1,13 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 36
+; Bound: 34
 ; Schema: 0
                OpCapability Shader
                OpCapability Float16
                OpCapability UniformAndStorageBuffer16BitAccess
                OpCapability StorageBuffer16BitAccess
                OpCapability StorageInputOutput16
-         %16 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -38,37 +37,36 @@
        %half = OpTypeFloat 16
      %v3half = OpTypeVector %half 3
 %half_0x1p_0 = OpConstant %half 0x1p+0
-         %18 = OpConstantComposite %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
 %_ptr_Function_v3half = OpTypePointer Function %v3half
-         %21 = OpConstantNull %v3half
+         %19 = OpConstantNull %v3half
-         %22 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
  %mix_63f2fd = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v3half Function %21
+        %res = OpVariable %_ptr_Function_v3half Function %19
-         %13 = OpExtInst %v3half %16 FMix %18 %18 %18
+               OpStore %res %16
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %22
+%vertex_main_inner = OpFunction %v4float None %20
-         %24 = OpLabel
+         %22 = OpLabel
-         %25 = OpFunctionCall %void %mix_63f2fd
+         %23 = OpFunctionCall %void %mix_63f2fd
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %27 = OpLabel
+         %25 = OpLabel
-         %28 = OpFunctionCall %v4float %vertex_main_inner
+         %26 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %28
+               OpStore %value %26
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %31 = OpLabel
+         %29 = OpLabel
-         %32 = OpFunctionCall %void %mix_63f2fd
+         %30 = OpFunctionCall %void %mix_63f2fd
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %mix_63f2fd
+         %33 = OpFunctionCall %void %mix_63f2fd
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/6f8adc.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_6f8adc() {
-  float2 res = lerp((1.0f).xx, (1.0f).xx, (1.0f).xx);
+  float2 res = (1.0f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/6f8adc.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void mix_6f8adc() {
-  float2 res = lerp((1.0f).xx, (1.0f).xx, (1.0f).xx);
+  float2 res = (1.0f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/6f8adc.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void mix_6f8adc() {
-  vec2 res = mix(vec2(1.0f), vec2(1.0f), vec2(1.0f));
+  vec2 res = vec2(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void mix_6f8adc() {
-  vec2 res = mix(vec2(1.0f), vec2(1.0f), vec2(1.0f));
+  vec2 res = vec2(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void mix_6f8adc() {
-  vec2 res = mix(vec2(1.0f), vec2(1.0f), vec2(1.0f));
+  vec2 res = vec2(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/6f8adc.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_6f8adc() {
-  float2 res = mix(float2(1.0f), float2(1.0f), float2(1.0f));
+  float2 res = float2(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/6f8adc.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 34
+; Bound: 32
 ; Schema: 0
                OpCapability Shader
-         %15 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -33,36 +32,35 @@
           %9 = OpTypeFunction %void
     %v2float = OpTypeVector %float 2
     %float_1 = OpConstant %float 1
-         %17 = OpConstantComposite %v2float %float_1 %float_1
+         %15 = OpConstantComposite %v2float %float_1 %float_1
 %_ptr_Function_v2float = OpTypePointer Function %v2float
-         %20 = OpConstantNull %v2float
+         %18 = OpConstantNull %v2float
-         %21 = OpTypeFunction %v4float
+         %19 = OpTypeFunction %v4float
  %mix_6f8adc = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v2float Function %20
+        %res = OpVariable %_ptr_Function_v2float Function %18
-         %13 = OpExtInst %v2float %15 FMix %17 %17 %17
+               OpStore %res %15
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %21
+%vertex_main_inner = OpFunction %v4float None %19
-         %23 = OpLabel
+         %21 = OpLabel
-         %24 = OpFunctionCall %void %mix_6f8adc
+         %22 = OpFunctionCall %void %mix_6f8adc
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %26 = OpLabel
+         %24 = OpLabel
-         %27 = OpFunctionCall %v4float %vertex_main_inner
+         %25 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %27
+               OpStore %value %25
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %29 = OpLabel
+         %27 = OpLabel
-         %30 = OpFunctionCall %void %mix_6f8adc
+         %28 = OpFunctionCall %void %mix_6f8adc
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %mix_6f8adc
+         %31 = OpFunctionCall %void %mix_6f8adc
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/98007a.wgsl

@@ -0,0 +1,43 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+////////////////////////////////////////////////////////////////////////////////
+// File generated by tools/src/cmd/gen
+// using the template:
+//   test/tint/builtins/gen/gen.wgsl.tmpl
+//
+// Do not modify this file directly
+////////////////////////////////////////////////////////////////////////////////
+
+
+// fn mix(vec<4, fa>, vec<4, fa>, vec<4, fa>) -> vec<4, fa>
+fn mix_98007a() {
+  var res = mix(vec4(1.), vec4(1.), vec4(1.));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_98007a();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_98007a();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_98007a();
+}

test/tint/builtins/gen/literal/mix/98007a.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void mix_98007a() {
+  float4 res = (1.0f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_98007a();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_98007a();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_98007a();
+  return;
+}

test/tint/builtins/gen/literal/mix/98007a.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void mix_98007a() {
+  float4 res = (1.0f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_98007a();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_98007a();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_98007a();
+  return;
+}

test/tint/builtins/gen/literal/mix/98007a.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void mix_98007a() {
+  vec4 res = vec4(1.0f);
+}
+
+vec4 vertex_main() {
+  mix_98007a();
+  return vec4(0.0f);
+}
+
+void main() {
+  gl_PointSize = 1.0;
+  vec4 inner_result = vertex_main();
+  gl_Position = inner_result;
+  gl_Position.y = -(gl_Position.y);
+  gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
+  return;
+}
+#version 310 es
+precision mediump float;
+
+void mix_98007a() {
+  vec4 res = vec4(1.0f);
+}
+
+void fragment_main() {
+  mix_98007a();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void mix_98007a() {
+  vec4 res = vec4(1.0f);
+}
+
+void compute_main() {
+  mix_98007a();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/mix/98007a.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void mix_98007a() {
+  float4 res = float4(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  mix_98007a();
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+  float4 const inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main() {
+  mix_98007a();
+  return;
+}
+
+kernel void compute_main() {
+  mix_98007a();
+  return;
+}
+

test/tint/builtins/gen/literal/mix/98007a.wgsl.expected.spvasm

@@ -0,0 +1,64 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 30
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+               OpEntryPoint Fragment %fragment_main "fragment_main"
+               OpEntryPoint GLCompute %compute_main "compute_main"
+               OpExecutionMode %fragment_main OriginUpperLeft
+               OpExecutionMode %compute_main LocalSize 1 1 1
+               OpName %value "value"
+               OpName %vertex_point_size "vertex_point_size"
+               OpName %mix_98007a "mix_98007a"
+               OpName %res "res"
+               OpName %vertex_main_inner "vertex_main_inner"
+               OpName %vertex_main "vertex_main"
+               OpName %fragment_main "fragment_main"
+               OpName %compute_main "compute_main"
+               OpDecorate %value BuiltIn Position
+               OpDecorate %vertex_point_size BuiltIn PointSize
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+          %5 = OpConstantNull %v4float
+      %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+          %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+       %void = OpTypeVoid
+          %9 = OpTypeFunction %void
+    %float_1 = OpConstant %float 1
+         %14 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
+%_ptr_Function_v4float = OpTypePointer Function %v4float
+         %17 = OpTypeFunction %v4float
+ %mix_98007a = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_v4float Function %5
+               OpStore %res %14
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %17
+         %19 = OpLabel
+         %20 = OpFunctionCall %void %mix_98007a
+               OpReturnValue %5
+               OpFunctionEnd
+%vertex_main = OpFunction %void None %9
+         %22 = OpLabel
+         %23 = OpFunctionCall %v4float %vertex_main_inner
+               OpStore %value %23
+               OpStore %vertex_point_size %float_1
+               OpReturn
+               OpFunctionEnd
+%fragment_main = OpFunction %void None %9
+         %25 = OpLabel
+         %26 = OpFunctionCall %void %mix_98007a
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %mix_98007a
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/mix/98007a.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn mix_98007a() {
+  var res = mix(vec4(1.0), vec4(1.0), vec4(1.0));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_98007a();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_98007a();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_98007a();
+}

test/tint/builtins/gen/literal/mix/98ee3e.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_98ee3e() {
-  vector<float16_t, 2> res = lerp((float16_t(1.0h)).xx, (float16_t(1.0h)).xx, (float16_t(1.0h)).xx);
+  vector<float16_t, 2> res = (float16_t(1.0h)).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/98ee3e.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_98ee3e() {
-  f16vec2 res = mix(f16vec2(1.0hf), f16vec2(1.0hf), f16vec2(1.0hf));
+  f16vec2 res = f16vec2(1.0hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void mix_98ee3e() {
-  f16vec2 res = mix(f16vec2(1.0hf), f16vec2(1.0hf), f16vec2(1.0hf));
+  f16vec2 res = f16vec2(1.0hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_98ee3e() {
-  f16vec2 res = mix(f16vec2(1.0hf), f16vec2(1.0hf), f16vec2(1.0hf));
+  f16vec2 res = f16vec2(1.0hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/98ee3e.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_98ee3e() {
-  half2 res = mix(half2(1.0h), half2(1.0h), half2(1.0h));
+  half2 res = half2(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/98ee3e.wgsl.expected.spvasm

@@ -1,14 +1,13 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 36
+; Bound: 34
 ; Schema: 0
                OpCapability Shader
                OpCapability Float16
                OpCapability UniformAndStorageBuffer16BitAccess
                OpCapability StorageBuffer16BitAccess
                OpCapability StorageInputOutput16
-         %16 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -38,37 +37,36 @@
        %half = OpTypeFloat 16
      %v2half = OpTypeVector %half 2
 %half_0x1p_0 = OpConstant %half 0x1p+0
-         %18 = OpConstantComposite %v2half %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v2half %half_0x1p_0 %half_0x1p_0
 %_ptr_Function_v2half = OpTypePointer Function %v2half
-         %21 = OpConstantNull %v2half
+         %19 = OpConstantNull %v2half
-         %22 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
  %mix_98ee3e = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v2half Function %21
+        %res = OpVariable %_ptr_Function_v2half Function %19
-         %13 = OpExtInst %v2half %16 FMix %18 %18 %18
+               OpStore %res %16
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %22
+%vertex_main_inner = OpFunction %v4float None %20
-         %24 = OpLabel
+         %22 = OpLabel
-         %25 = OpFunctionCall %void %mix_98ee3e
+         %23 = OpFunctionCall %void %mix_98ee3e
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %27 = OpLabel
+         %25 = OpLabel
-         %28 = OpFunctionCall %v4float %vertex_main_inner
+         %26 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %28
+               OpStore %value %26
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %31 = OpLabel
+         %29 = OpLabel
-         %32 = OpFunctionCall %void %mix_98ee3e
+         %30 = OpFunctionCall %void %mix_98ee3e
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %mix_98ee3e
+         %33 = OpFunctionCall %void %mix_98ee3e
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/mix/9c2681.wgsl

@@ -0,0 +1,43 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+////////////////////////////////////////////////////////////////////////////////
+// File generated by tools/src/cmd/gen
+// using the template:
+//   test/tint/builtins/gen/gen.wgsl.tmpl
+//
+// Do not modify this file directly
+////////////////////////////////////////////////////////////////////////////////
+
+
+// fn mix(vec<3, fa>, vec<3, fa>, fa) -> vec<3, fa>
+fn mix_9c2681() {
+  var res = mix(vec3(1.), vec3(1.), 1.);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_9c2681();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_9c2681();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_9c2681();
+}

test/tint/builtins/gen/literal/mix/9c2681.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void mix_9c2681() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_9c2681();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_9c2681();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_9c2681();
+  return;
+}

test/tint/builtins/gen/literal/mix/9c2681.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void mix_9c2681() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  mix_9c2681();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  mix_9c2681();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  mix_9c2681();
+  return;
+}

test/tint/builtins/gen/literal/mix/9c2681.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void mix_9c2681() {
+  vec3 res = vec3(1.0f);
+}
+
+vec4 vertex_main() {
+  mix_9c2681();
+  return vec4(0.0f);
+}
+
+void main() {
+  gl_PointSize = 1.0;
+  vec4 inner_result = vertex_main();
+  gl_Position = inner_result;
+  gl_Position.y = -(gl_Position.y);
+  gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
+  return;
+}
+#version 310 es
+precision mediump float;
+
+void mix_9c2681() {
+  vec3 res = vec3(1.0f);
+}
+
+void fragment_main() {
+  mix_9c2681();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void mix_9c2681() {
+  vec3 res = vec3(1.0f);
+}
+
+void compute_main() {
+  mix_9c2681();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/mix/9c2681.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void mix_9c2681() {
+  float3 res = float3(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  mix_9c2681();
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+  float4 const inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main() {
+  mix_9c2681();
+  return;
+}
+
+kernel void compute_main() {
+  mix_9c2681();
+  return;
+}
+

test/tint/builtins/gen/literal/mix/9c2681.wgsl.expected.spvasm

@@ -0,0 +1,66 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 32
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+               OpEntryPoint Fragment %fragment_main "fragment_main"
+               OpEntryPoint GLCompute %compute_main "compute_main"
+               OpExecutionMode %fragment_main OriginUpperLeft
+               OpExecutionMode %compute_main LocalSize 1 1 1
+               OpName %value "value"
+               OpName %vertex_point_size "vertex_point_size"
+               OpName %mix_9c2681 "mix_9c2681"
+               OpName %res "res"
+               OpName %vertex_main_inner "vertex_main_inner"
+               OpName %vertex_main "vertex_main"
+               OpName %fragment_main "fragment_main"
+               OpName %compute_main "compute_main"
+               OpDecorate %value BuiltIn Position
+               OpDecorate %vertex_point_size BuiltIn PointSize
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+          %5 = OpConstantNull %v4float
+      %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+          %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+       %void = OpTypeVoid
+          %9 = OpTypeFunction %void
+    %v3float = OpTypeVector %float 3
+    %float_1 = OpConstant %float 1
+         %15 = OpConstantComposite %v3float %float_1 %float_1 %float_1
+%_ptr_Function_v3float = OpTypePointer Function %v3float
+         %18 = OpConstantNull %v3float
+         %19 = OpTypeFunction %v4float
+ %mix_9c2681 = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_v3float Function %18
+               OpStore %res %15
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %19
+         %21 = OpLabel
+         %22 = OpFunctionCall %void %mix_9c2681
+               OpReturnValue %5
+               OpFunctionEnd
+%vertex_main = OpFunction %void None %9
+         %24 = OpLabel
+         %25 = OpFunctionCall %v4float %vertex_main_inner
+               OpStore %value %25
+               OpStore %vertex_point_size %float_1
+               OpReturn
+               OpFunctionEnd
+%fragment_main = OpFunction %void None %9
+         %27 = OpLabel
+         %28 = OpFunctionCall %void %mix_9c2681
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %30 = OpLabel
+         %31 = OpFunctionCall %void %mix_9c2681
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/mix/9c2681.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn mix_9c2681() {
+  var res = mix(vec3(1.0), vec3(1.0), 1.0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  mix_9c2681();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  mix_9c2681();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  mix_9c2681();
+}

test/tint/builtins/gen/literal/mix/c1aec6.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void mix_c1aec6() {
-  vector<float16_t, 3> res = lerp((float16_t(1.0h)).xxx, (float16_t(1.0h)).xxx, float16_t(1.0h));
+  vector<float16_t, 3> res = (float16_t(1.0h)).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/c1aec6.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_c1aec6() {
-  f16vec3 res = mix(f16vec3(1.0hf), f16vec3(1.0hf), 1.0hf);
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void mix_c1aec6() {
-  f16vec3 res = mix(f16vec3(1.0hf), f16vec3(1.0hf), 1.0hf);
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void mix_c1aec6() {
-  f16vec3 res = mix(f16vec3(1.0hf), f16vec3(1.0hf), 1.0hf);
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/mix/c1aec6.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void mix_c1aec6() {
-  half3 res = mix(half3(1.0h), half3(1.0h), 1.0h);
+  half3 res = half3(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/mix/c1aec6.wgsl.expected.spvasm

@@ -1,14 +1,13 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 38
+; Bound: 34
 ; Schema: 0
                OpCapability Shader
                OpCapability Float16
                OpCapability UniformAndStorageBuffer16BitAccess
                OpCapability StorageBuffer16BitAccess
                OpCapability StorageInputOutput16
-         %16 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
                OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
                OpEntryPoint Fragment %fragment_main "fragment_main"
@@ -38,39 +37,36 @@
        %half = OpTypeFloat 16
      %v3half = OpTypeVector %half 3
 %half_0x1p_0 = OpConstant %half 0x1p+0
-         %18 = OpConstantComposite %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
 %_ptr_Function_v3half = OpTypePointer Function %v3half
-         %21 = OpConstantNull %v3half
+         %19 = OpConstantNull %v3half
-         %24 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
  %mix_c1aec6 = OpFunction %void None %9
          %12 = OpLabel
-         %19 = OpVariable %_ptr_Function_v3half Function %21
+        %res = OpVariable %_ptr_Function_v3half Function %19
-        %res = OpVariable %_ptr_Function_v3half Function %21
+               OpStore %res %16
-         %22 = OpCompositeConstruct %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
-         %13 = OpExtInst %v3half %16 FMix %18 %18 %22
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %24
+%vertex_main_inner = OpFunction %v4float None %20
-         %26 = OpLabel
+         %22 = OpLabel
-         %27 = OpFunctionCall %void %mix_c1aec6
+         %23 = OpFunctionCall %void %mix_c1aec6
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %29 = OpLabel
+         %25 = OpLabel
-         %30 = OpFunctionCall %v4float %vertex_main_inner
+         %26 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %30
+               OpStore %value %26
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %33 = OpLabel
+         %29 = OpLabel
-         %34 = OpFunctionCall %void %mix_c1aec6
+         %30 = OpFunctionCall %void %mix_c1aec6
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %36 = OpLabel
+         %32 = OpLabel
-         %37 = OpFunctionCall %void %mix_c1aec6
+         %33 = OpFunctionCall %void %mix_c1aec6
                OpReturn
                OpFunctionEnd