Add const-eval for `trunc`

This CL adds const-eval for `trunc`.

Bug: tint:1581
Change-Id: If58f79ea70fe490746e30ed118d847c61edd8023
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110173
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>

src/tint/intrinsics.def

@@ -547,8 +547,8 @@ fn sqrt<N: num, T: f32_f16>(vec<N, T>) -> vec<N, T>
 @const fn tanh<T: fa_f32_f16>(T) -> T
 @const fn tanh<N: num, T: fa_f32_f16>(vec<N, T>) -> vec<N, T>
 fn transpose<M: num, N: num, T: f32_f16>(mat<M, N, T>) -> mat<N, M, T>
-fn trunc<T: f32_f16>(T) -> T
+@const fn trunc<T: fa_f32_f16>(@test_value(1.5) T) -> T
-fn trunc<N: num, T: f32_f16>(vec<N, T>) -> vec<N, T>
+@const fn trunc<N: num, T: fa_f32_f16>(@test_value(1.5) vec<N, T>) -> vec<N, T>
 @const fn unpack2x16float(u32) -> vec2<f32>
 @const fn unpack2x16snorm(u32) -> vec2<f32>
 @const fn unpack2x16unorm(u32) -> vec2<f32>

src/tint/resolver/const_eval.cc

@@ -2401,6 +2401,18 @@ ConstEval::Result ConstEval::tanh(const sem::Type* ty,
     return TransformElements(builder, ty, transform, args[0]);
 }
 
+ConstEval::Result ConstEval::trunc(const sem::Type* ty,
+                                   utils::VectorRef<const sem::Constant*> args,
+                                   const Source&) {
+    auto transform = [&](const sem::Constant* c0) {
+        auto create = [&](auto i) {
+            return CreateElement(builder, c0->Type(), decltype(i)(std::trunc(i.value)));
+        };
+        return Dispatch_fa_f32_f16(create, c0);
+    };
+    return TransformElements(builder, ty, transform, args[0]);
+}
+
 ConstEval::Result ConstEval::unpack2x16float(const sem::Type* ty,
                                              utils::VectorRef<const sem::Constant*> args,
                                              const Source& source) {

src/tint/resolver/const_eval.h

@@ -737,6 +737,15 @@ class ConstEval {
                 utils::VectorRef<const sem::Constant*> args,
                 const Source& source);
 
+    /// trunc builtin
+    /// @param ty the expression type
+    /// @param args the input arguments
+    /// @param source the source location of the conversion
+    /// @return the result value, or null if the value cannot be calculated
+    Result trunc(const sem::Type* ty,
+                 utils::VectorRef<const sem::Constant*> args,
+                 const Source& source);
+
     /// unpack2x16float builtin
     /// @param ty the expression type
     /// @param args the input arguments

src/tint/resolver/const_eval_builtin_test.cc

@@ -1693,6 +1693,26 @@ INSTANTIATE_TEST_SUITE_P(  //
                                               TanhCases<f32>(),
                                               TanhCases<f16>()))));
 
+template <typename T>
+std::vector<Case> TruncCases() {
+    std::vector<Case> cases = {C({T(0)}, T(0)),    //
+                               C({-T(0)}, -T(0)),  //
+                               C({T(1.5)}, T(1)),  //
+                               C({-T(1.5)}, -T(1)),
+
+                               // Vector tests
+                               C({Vec(T(0.0), T(1.5), -T(2.2))}, Vec(T(0), T(1), -T(2)))};
+
+    return cases;
+}
+INSTANTIATE_TEST_SUITE_P(  //
+    Trunc,
+    ResolverConstEvalBuiltinTest,
+    testing::Combine(testing::Values(sem::BuiltinType::kTrunc),
+                     testing::ValuesIn(Concat(TruncCases<AFloat>(),  //
+                                              TruncCases<f32>(),
+                                              TruncCases<f16>()))));
+
 std::vector<Case> Unpack4x8snormCases() {
     return {
         C({Val(u32(0x0000'0000))}, Vec(f32(0), f32(0), f32(0), f32(0))),

src/tint/resolver/intrinsic_table.inl

@@ -12729,24 +12729,24 @@ constexpr OverloadInfo kOverloads[] = {
     /* num parameters */ 1,
     /* num template types */ 1,
     /* num template numbers */ 0,
-    /* template types */ &kTemplateTypes[25],
+    /* template types */ &kTemplateTypes[24],
     /* template numbers */ &kTemplateNumbers[10],
     /* parameters */ &kParameters[977],
     /* return matcher indices */ &kMatcherIndices[1],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::trunc,
   },
   {
     /* [367] */
     /* num parameters */ 1,
     /* num template types */ 1,
     /* num template numbers */ 1,
-    /* template types */ &kTemplateTypes[25],
+    /* template types */ &kTemplateTypes[24],
     /* template numbers */ &kTemplateNumbers[5],
     /* parameters */ &kParameters[976],
     /* return matcher indices */ &kMatcherIndices[30],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::trunc,
   },
   {
     /* [368] */
@@ -14551,8 +14551,8 @@ constexpr IntrinsicInfo kBuiltins[] = {
   },
   {
     /* [79] */
-    /* fn trunc<T : f32_f16>(T) -> T */
+    /* fn trunc<T : fa_f32_f16>(@test_value(1.5) T) -> T */
-    /* fn trunc<N : num, T : f32_f16>(vec<N, T>) -> vec<N, T> */
+    /* fn trunc<N : num, T : fa_f32_f16>(@test_value(1.5) vec<N, T>) -> vec<N, T> */
     /* num overloads */ 2,
     /* overloads */ &kOverloads[366],
   },

test/tint/builtins/gen/literal/trunc/103ab8.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn trunc(vec<3, f16>) -> vec<3, f16>
 fn trunc_103ab8() {
-  var res: vec3<f16> = trunc(vec3<f16>(1.h));
+  var res: vec3<f16> = trunc(vec3<f16>(1.5h));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/103ab8.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_103ab8() {
-  vector<float16_t, 3> res = trunc((float16_t(1.0h)).xxx);
+  vector<float16_t, 3> res = (float16_t(1.0h)).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/103ab8.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_103ab8() {
-  f16vec3 res = trunc(f16vec3(1.0hf));
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void trunc_103ab8() {
-  f16vec3 res = trunc(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 trunc_103ab8() {
-  f16vec3 res = trunc(f16vec3(1.0hf));
+  f16vec3 res = f16vec3(1.0hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/103ab8.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_103ab8() {
-  half3 res = trunc(half3(1.0h));
+  half3 res = half3(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/103ab8.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
 %trunc_103ab8 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v3half Function %21
+        %res = OpVariable %_ptr_Function_v3half Function %19
-         %13 = OpExtInst %v3half %16 Trunc %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 %trunc_103ab8
+         %23 = OpFunctionCall %void %trunc_103ab8
                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 %trunc_103ab8
+         %30 = OpFunctionCall %void %trunc_103ab8
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %trunc_103ab8
+         %33 = OpFunctionCall %void %trunc_103ab8
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/103ab8.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn trunc_103ab8() {
-  var res : vec3<f16> = trunc(vec3<f16>(1.0h));
+  var res : vec3<f16> = trunc(vec3<f16>(1.5h));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/117396.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 trunc(vec<3, fa>) -> vec<3, fa>
+fn trunc_117396() {
+  var res = trunc(vec3(1.5));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_117396();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_117396();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_117396();
+}

test/tint/builtins/gen/literal/trunc/117396.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_117396() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_117396();
+  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() {
+  trunc_117396();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_117396();
+  return;
+}

test/tint/builtins/gen/literal/trunc/117396.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_117396() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_117396();
+  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() {
+  trunc_117396();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_117396();
+  return;
+}

test/tint/builtins/gen/literal/trunc/117396.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void trunc_117396() {
+  vec3 res = vec3(1.0f);
+}
+
+vec4 vertex_main() {
+  trunc_117396();
+  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 trunc_117396() {
+  vec3 res = vec3(1.0f);
+}
+
+void fragment_main() {
+  trunc_117396();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void trunc_117396() {
+  vec3 res = vec3(1.0f);
+}
+
+void compute_main() {
+  trunc_117396();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/trunc/117396.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void trunc_117396() {
+  float3 res = float3(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  trunc_117396();
+  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() {
+  trunc_117396();
+  return;
+}
+
+kernel void compute_main() {
+  trunc_117396();
+  return;
+}
+

test/tint/builtins/gen/literal/trunc/117396.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 %trunc_117396 "trunc_117396"
+               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
+%trunc_117396 = 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 %trunc_117396
+               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 %trunc_117396
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %30 = OpLabel
+         %31 = OpFunctionCall %void %trunc_117396
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/trunc/117396.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn trunc_117396() {
+  var res = trunc(vec3(1.5));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_117396();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_117396();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_117396();
+}

test/tint/builtins/gen/literal/trunc/562d05.wgsl

@@ -23,7 +23,7 @@
 
 // fn trunc(vec<3, f32>) -> vec<3, f32>
 fn trunc_562d05() {
-  var res: vec3<f32> = trunc(vec3<f32>(1.f));
+  var res: vec3<f32> = trunc(vec3<f32>(1.5f));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/562d05.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_562d05() {
-  float3 res = trunc((1.0f).xxx);
+  float3 res = (1.0f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/562d05.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_562d05() {
-  float3 res = trunc((1.0f).xxx);
+  float3 res = (1.0f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/562d05.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void trunc_562d05() {
-  vec3 res = trunc(vec3(1.0f));
+  vec3 res = vec3(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void trunc_562d05() {
-  vec3 res = trunc(vec3(1.0f));
+  vec3 res = vec3(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void trunc_562d05() {
-  vec3 res = trunc(vec3(1.0f));
+  vec3 res = vec3(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/562d05.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_562d05() {
-  float3 res = trunc(float3(1.0f));
+  float3 res = float3(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/562d05.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
 %trunc_562d05 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v3float Function %20
+        %res = OpVariable %_ptr_Function_v3float Function %18
-         %13 = OpExtInst %v3float %15 Trunc %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 %trunc_562d05
+         %22 = OpFunctionCall %void %trunc_562d05
                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 %trunc_562d05
+         %28 = OpFunctionCall %void %trunc_562d05
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %trunc_562d05
+         %31 = OpFunctionCall %void %trunc_562d05
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/562d05.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn trunc_562d05() {
-  var res : vec3<f32> = trunc(vec3<f32>(1.0f));
+  var res : vec3<f32> = trunc(vec3<f32>(1.5f));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/7d6ded.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 trunc(fa) -> fa
+fn trunc_7d6ded() {
+  var res = trunc(1.5);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_7d6ded();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_7d6ded();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_7d6ded();
+}

test/tint/builtins/gen/literal/trunc/7d6ded.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_7d6ded() {
+  float res = 1.0f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_7d6ded();
+  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() {
+  trunc_7d6ded();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_7d6ded();
+  return;
+}

test/tint/builtins/gen/literal/trunc/7d6ded.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_7d6ded() {
+  float res = 1.0f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_7d6ded();
+  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() {
+  trunc_7d6ded();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_7d6ded();
+  return;
+}

test/tint/builtins/gen/literal/trunc/7d6ded.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void trunc_7d6ded() {
+  float res = 1.0f;
+}
+
+vec4 vertex_main() {
+  trunc_7d6ded();
+  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 trunc_7d6ded() {
+  float res = 1.0f;
+}
+
+void fragment_main() {
+  trunc_7d6ded();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void trunc_7d6ded() {
+  float res = 1.0f;
+}
+
+void compute_main() {
+  trunc_7d6ded();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/trunc/7d6ded.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void trunc_7d6ded() {
+  float res = 1.0f;
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  trunc_7d6ded();
+  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() {
+  trunc_7d6ded();
+  return;
+}
+
+kernel void compute_main() {
+  trunc_7d6ded();
+  return;
+}
+

test/tint/builtins/gen/literal/trunc/7d6ded.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 %trunc_7d6ded "trunc_7d6ded"
+               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
+%trunc_7d6ded = 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 %trunc_7d6ded
+               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 %trunc_7d6ded
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %27 = OpLabel
+         %28 = OpFunctionCall %void %trunc_7d6ded
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/trunc/7d6ded.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn trunc_7d6ded() {
+  var res = trunc(1.5);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_7d6ded();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_7d6ded();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_7d6ded();
+}

test/tint/builtins/gen/literal/trunc/a56109.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn trunc(vec<2, f16>) -> vec<2, f16>
 fn trunc_a56109() {
-  var res: vec2<f16> = trunc(vec2<f16>(1.h));
+  var res: vec2<f16> = trunc(vec2<f16>(1.5h));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/a56109.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_a56109() {
-  vector<float16_t, 2> res = trunc((float16_t(1.0h)).xx);
+  vector<float16_t, 2> res = (float16_t(1.0h)).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/a56109.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_a56109() {
-  f16vec2 res = trunc(f16vec2(1.0hf));
+  f16vec2 res = f16vec2(1.0hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void trunc_a56109() {
-  f16vec2 res = trunc(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 trunc_a56109() {
-  f16vec2 res = trunc(f16vec2(1.0hf));
+  f16vec2 res = f16vec2(1.0hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/a56109.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_a56109() {
-  half2 res = trunc(half2(1.0h));
+  half2 res = half2(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/a56109.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
 %trunc_a56109 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v2half Function %21
+        %res = OpVariable %_ptr_Function_v2half Function %19
-         %13 = OpExtInst %v2half %16 Trunc %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 %trunc_a56109
+         %23 = OpFunctionCall %void %trunc_a56109
                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 %trunc_a56109
+         %30 = OpFunctionCall %void %trunc_a56109
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %trunc_a56109
+         %33 = OpFunctionCall %void %trunc_a56109
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/a56109.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn trunc_a56109() {
-  var res : vec2<f16> = trunc(vec2<f16>(1.0h));
+  var res : vec2<f16> = trunc(vec2<f16>(1.5h));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/c12555.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 trunc(vec<2, fa>) -> vec<2, fa>
+fn trunc_c12555() {
+  var res = trunc(vec2(1.5));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_c12555();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_c12555();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_c12555();
+}

test/tint/builtins/gen/literal/trunc/c12555.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_c12555() {
+  float2 res = (1.0f).xx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_c12555();
+  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() {
+  trunc_c12555();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_c12555();
+  return;
+}

test/tint/builtins/gen/literal/trunc/c12555.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_c12555() {
+  float2 res = (1.0f).xx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_c12555();
+  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() {
+  trunc_c12555();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_c12555();
+  return;
+}

test/tint/builtins/gen/literal/trunc/c12555.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void trunc_c12555() {
+  vec2 res = vec2(1.0f);
+}
+
+vec4 vertex_main() {
+  trunc_c12555();
+  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 trunc_c12555() {
+  vec2 res = vec2(1.0f);
+}
+
+void fragment_main() {
+  trunc_c12555();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void trunc_c12555() {
+  vec2 res = vec2(1.0f);
+}
+
+void compute_main() {
+  trunc_c12555();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/trunc/c12555.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void trunc_c12555() {
+  float2 res = float2(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  trunc_c12555();
+  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() {
+  trunc_c12555();
+  return;
+}
+
+kernel void compute_main() {
+  trunc_c12555();
+  return;
+}
+

test/tint/builtins/gen/literal/trunc/c12555.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 %trunc_c12555 "trunc_c12555"
+               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
+%trunc_c12555 = 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 %trunc_c12555
+               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 %trunc_c12555
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %30 = OpLabel
+         %31 = OpFunctionCall %void %trunc_c12555
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/trunc/c12555.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn trunc_c12555() {
+  var res = trunc(vec2(1.5));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_c12555();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_c12555();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_c12555();
+}

test/tint/builtins/gen/literal/trunc/cc2b0d.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn trunc(f16) -> f16
 fn trunc_cc2b0d() {
-  var res: f16 = trunc(1.h);
+  var res: f16 = trunc(1.5h);
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/cc2b0d.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_cc2b0d() {
-  float16_t res = trunc(float16_t(1.0h));
+  float16_t res = float16_t(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/cc2b0d.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_cc2b0d() {
-  float16_t res = trunc(1.0hf);
+  float16_t res = 1.0hf;
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void trunc_cc2b0d() {
-  float16_t res = trunc(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 trunc_cc2b0d() {
-  float16_t res = trunc(1.0hf);
+  float16_t res = 1.0hf;
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/cc2b0d.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_cc2b0d() {
-  half res = trunc(1.0h);
+  half res = 1.0h;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/cc2b0d.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
 %trunc_cc2b0d = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_half Function %19
+        %res = OpVariable %_ptr_Function_half Function %17
-         %13 = OpExtInst %half %15 Trunc %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 %trunc_cc2b0d
+         %21 = OpFunctionCall %void %trunc_cc2b0d
                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 %trunc_cc2b0d
+         %28 = OpFunctionCall %void %trunc_cc2b0d
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %trunc_cc2b0d
+         %31 = OpFunctionCall %void %trunc_cc2b0d
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/cc2b0d.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn trunc_cc2b0d() {
-  var res : f16 = trunc(1.0h);
+  var res : f16 = trunc(1.5h);
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/ce7c17.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn trunc(vec<4, f16>) -> vec<4, f16>
 fn trunc_ce7c17() {
-  var res: vec4<f16> = trunc(vec4<f16>(1.h));
+  var res: vec4<f16> = trunc(vec4<f16>(1.5h));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/ce7c17.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_ce7c17() {
-  vector<float16_t, 4> res = trunc((float16_t(1.0h)).xxxx);
+  vector<float16_t, 4> res = (float16_t(1.0h)).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/ce7c17.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_ce7c17() {
-  f16vec4 res = trunc(f16vec4(1.0hf));
+  f16vec4 res = f16vec4(1.0hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void trunc_ce7c17() {
-  f16vec4 res = trunc(f16vec4(1.0hf));
+  f16vec4 res = f16vec4(1.0hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_ce7c17() {
-  f16vec4 res = trunc(f16vec4(1.0hf));
+  f16vec4 res = f16vec4(1.0hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/ce7c17.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_ce7c17() {
-  half4 res = trunc(half4(1.0h));
+  half4 res = half4(1.0h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/ce7c17.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
      %v4half = OpTypeVector %half 4
 %half_0x1p_0 = OpConstant %half 0x1p+0
-         %18 = OpConstantComposite %v4half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v4half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
 %_ptr_Function_v4half = OpTypePointer Function %v4half
-         %21 = OpConstantNull %v4half
+         %19 = OpConstantNull %v4half
-         %22 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
 %trunc_ce7c17 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v4half Function %21
+        %res = OpVariable %_ptr_Function_v4half Function %19
-         %13 = OpExtInst %v4half %16 Trunc %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 %trunc_ce7c17
+         %23 = OpFunctionCall %void %trunc_ce7c17
                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 %trunc_ce7c17
+         %30 = OpFunctionCall %void %trunc_ce7c17
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %trunc_ce7c17
+         %33 = OpFunctionCall %void %trunc_ce7c17
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/ce7c17.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn trunc_ce7c17() {
-  var res : vec4<f16> = trunc(vec4<f16>(1.0h));
+  var res : vec4<f16> = trunc(vec4<f16>(1.5h));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/e183aa.wgsl

@@ -23,7 +23,7 @@
 
 // fn trunc(vec<4, f32>) -> vec<4, f32>
 fn trunc_e183aa() {
-  var res: vec4<f32> = trunc(vec4<f32>(1.f));
+  var res: vec4<f32> = trunc(vec4<f32>(1.5f));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/e183aa.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_e183aa() {
-  float4 res = trunc((1.0f).xxxx);
+  float4 res = (1.0f).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/e183aa.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_e183aa() {
-  float4 res = trunc((1.0f).xxxx);
+  float4 res = (1.0f).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/e183aa.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void trunc_e183aa() {
-  vec4 res = trunc(vec4(1.0f));
+  vec4 res = vec4(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void trunc_e183aa() {
-  vec4 res = trunc(vec4(1.0f));
+  vec4 res = vec4(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void trunc_e183aa() {
-  vec4 res = trunc(vec4(1.0f));
+  vec4 res = vec4(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/e183aa.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_e183aa() {
-  float4 res = trunc(float4(1.0f));
+  float4 res = float4(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/e183aa.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 32
+; 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"
@@ -32,35 +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
-         %19 = OpTypeFunction %v4float
+         %17 = OpTypeFunction %v4float
 %trunc_e183aa = OpFunction %void None %9
          %12 = OpLabel
         %res = OpVariable %_ptr_Function_v4float Function %5
-         %13 = OpExtInst %v4float %14 Trunc %16
+               OpStore %res %14
-               OpStore %res %13
                OpReturn
                OpFunctionEnd
-%vertex_main_inner = OpFunction %v4float None %19
+%vertex_main_inner = OpFunction %v4float None %17
-         %21 = OpLabel
+         %19 = OpLabel
-         %22 = OpFunctionCall %void %trunc_e183aa
+         %20 = OpFunctionCall %void %trunc_e183aa
                OpReturnValue %5
                OpFunctionEnd
 %vertex_main = OpFunction %void None %9
-         %24 = OpLabel
+         %22 = OpLabel
-         %25 = OpFunctionCall %v4float %vertex_main_inner
+         %23 = OpFunctionCall %v4float %vertex_main_inner
-               OpStore %value %25
+               OpStore %value %23
                OpStore %vertex_point_size %float_1
                OpReturn
                OpFunctionEnd
 %fragment_main = OpFunction %void None %9
-         %27 = OpLabel
+         %25 = OpLabel
-         %28 = OpFunctionCall %void %trunc_e183aa
+         %26 = OpFunctionCall %void %trunc_e183aa
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %30 = OpLabel
+         %28 = OpLabel
-         %31 = OpFunctionCall %void %trunc_e183aa
+         %29 = OpFunctionCall %void %trunc_e183aa
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/e183aa.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn trunc_e183aa() {
-  var res : vec4<f32> = trunc(vec4<f32>(1.0f));
+  var res : vec4<f32> = trunc(vec4<f32>(1.5f));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/eb83df.wgsl

@@ -23,7 +23,7 @@
 
 // fn trunc(f32) -> f32
 fn trunc_eb83df() {
-  var res: f32 = trunc(1.f);
+  var res: f32 = trunc(1.5f);
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/eb83df.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_eb83df() {
-  float res = trunc(1.0f);
+  float res = 1.0f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/eb83df.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_eb83df() {
-  float res = trunc(1.0f);
+  float res = 1.0f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/eb83df.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void trunc_eb83df() {
-  float res = trunc(1.0f);
+  float res = 1.0f;
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void trunc_eb83df() {
-  float res = trunc(1.0f);
+  float res = 1.0f;
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void trunc_eb83df() {
-  float res = trunc(1.0f);
+  float res = 1.0f;
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/eb83df.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_eb83df() {
-  float res = trunc(1.0f);
+  float res = 1.0f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/eb83df.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
 %trunc_eb83df = OpFunction %void None %9
          %12 = OpLabel
         %res = OpVariable %_ptr_Function_float Function %8
-         %13 = OpExtInst %float %14 Trunc %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 %trunc_eb83df
+         %19 = OpFunctionCall %void %trunc_eb83df
                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 %trunc_eb83df
+         %25 = OpFunctionCall %void %trunc_eb83df
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %29 = OpLabel
+         %27 = OpLabel
-         %30 = OpFunctionCall %void %trunc_eb83df
+         %28 = OpFunctionCall %void %trunc_eb83df
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/eb83df.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn trunc_eb83df() {
-  var res : f32 = trunc(1.0f);
+  var res : f32 = trunc(1.5f);
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/f0f1a1.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 trunc(vec<4, fa>) -> vec<4, fa>
+fn trunc_f0f1a1() {
+  var res = trunc(vec4(1.5));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_f0f1a1();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_f0f1a1();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_f0f1a1();
+}

test/tint/builtins/gen/literal/trunc/f0f1a1.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_f0f1a1() {
+  float4 res = (1.0f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_f0f1a1();
+  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() {
+  trunc_f0f1a1();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_f0f1a1();
+  return;
+}

test/tint/builtins/gen/literal/trunc/f0f1a1.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_f0f1a1() {
+  float4 res = (1.0f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_f0f1a1();
+  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() {
+  trunc_f0f1a1();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_f0f1a1();
+  return;
+}

test/tint/builtins/gen/literal/trunc/f0f1a1.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void trunc_f0f1a1() {
+  vec4 res = vec4(1.0f);
+}
+
+vec4 vertex_main() {
+  trunc_f0f1a1();
+  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 trunc_f0f1a1() {
+  vec4 res = vec4(1.0f);
+}
+
+void fragment_main() {
+  trunc_f0f1a1();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void trunc_f0f1a1() {
+  vec4 res = vec4(1.0f);
+}
+
+void compute_main() {
+  trunc_f0f1a1();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/trunc/f0f1a1.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void trunc_f0f1a1() {
+  float4 res = float4(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  trunc_f0f1a1();
+  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() {
+  trunc_f0f1a1();
+  return;
+}
+
+kernel void compute_main() {
+  trunc_f0f1a1();
+  return;
+}
+

test/tint/builtins/gen/literal/trunc/f0f1a1.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 %trunc_f0f1a1 "trunc_f0f1a1"
+               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
+%trunc_f0f1a1 = 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 %trunc_f0f1a1
+               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 %trunc_f0f1a1
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %trunc_f0f1a1
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/trunc/f0f1a1.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn trunc_f0f1a1() {
+  var res = trunc(vec4(1.5));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_f0f1a1();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_f0f1a1();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_f0f1a1();
+}

test/tint/builtins/gen/literal/trunc/f370d3.wgsl

@@ -23,7 +23,7 @@
 
 // fn trunc(vec<2, f32>) -> vec<2, f32>
 fn trunc_f370d3() {
-  var res: vec2<f32> = trunc(vec2<f32>(1.f));
+  var res: vec2<f32> = trunc(vec2<f32>(1.5f));
 }
 
 @vertex

test/tint/builtins/gen/literal/trunc/f370d3.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_f370d3() {
-  float2 res = trunc((1.0f).xx);
+  float2 res = (1.0f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/f370d3.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_f370d3() {
-  float2 res = trunc((1.0f).xx);
+  float2 res = (1.0f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/f370d3.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void trunc_f370d3() {
-  vec2 res = trunc(vec2(1.0f));
+  vec2 res = vec2(1.0f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void trunc_f370d3() {
-  vec2 res = trunc(vec2(1.0f));
+  vec2 res = vec2(1.0f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void trunc_f370d3() {
-  vec2 res = trunc(vec2(1.0f));
+  vec2 res = vec2(1.0f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/trunc/f370d3.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_f370d3() {
-  float2 res = trunc(float2(1.0f));
+  float2 res = float2(1.0f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/trunc/f370d3.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
 %trunc_f370d3 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v2float Function %20
+        %res = OpVariable %_ptr_Function_v2float Function %18
-         %13 = OpExtInst %v2float %15 Trunc %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 %trunc_f370d3
+         %22 = OpFunctionCall %void %trunc_f370d3
                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 %trunc_f370d3
+         %28 = OpFunctionCall %void %trunc_f370d3
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %trunc_f370d3
+         %31 = OpFunctionCall %void %trunc_f370d3
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/trunc/f370d3.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn trunc_f370d3() {
-  var res : vec2<f32> = trunc(vec2<f32>(1.0f));
+  var res : vec2<f32> = trunc(vec2<f32>(1.5f));
 }
 
 @vertex

test/tint/builtins/gen/var/trunc/103ab8.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn trunc(vec<3, f16>) -> vec<3, f16>
 fn trunc_103ab8() {
-  var arg_0 = vec3<f16>(1.h);
+  var arg_0 = vec3<f16>(1.5h);
   var res: vec3<f16> = trunc(arg_0);
 }
 

test/tint/builtins/gen/var/trunc/103ab8.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_103ab8() {
-  vector<float16_t, 3> arg_0 = (float16_t(1.0h)).xxx;
+  vector<float16_t, 3> arg_0 = (float16_t(1.5h)).xxx;
   vector<float16_t, 3> res = trunc(arg_0);
 }
 

test/tint/builtins/gen/var/trunc/103ab8.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_103ab8() {
-  f16vec3 arg_0 = f16vec3(1.0hf);
+  f16vec3 arg_0 = f16vec3(1.5hf);
   f16vec3 res = trunc(arg_0);
 }
 
@@ -24,7 +24,7 @@ void main() {
 precision mediump float;
 
 void trunc_103ab8() {
-  f16vec3 arg_0 = f16vec3(1.0hf);
+  f16vec3 arg_0 = f16vec3(1.5hf);
   f16vec3 res = trunc(arg_0);
 }
 
@@ -40,7 +40,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void trunc_103ab8() {
-  f16vec3 arg_0 = f16vec3(1.0hf);
+  f16vec3 arg_0 = f16vec3(1.5hf);
   f16vec3 res = trunc(arg_0);
 }
 

test/tint/builtins/gen/var/trunc/103ab8.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void trunc_103ab8() {
-  half3 arg_0 = half3(1.0h);
+  half3 arg_0 = half3(1.5h);
   half3 res = trunc(arg_0);
 }
 

test/tint/builtins/gen/var/trunc/103ab8.wgsl.expected.spvasm

@@ -38,8 +38,8 @@
           %9 = OpTypeFunction %void
        %half = OpTypeFloat 16
      %v3half = OpTypeVector %half 3
-%half_0x1p_0 = OpConstant %half 0x1p+0
+%half_0x1_8p_0 = OpConstant %half 0x1.8p+0
-         %16 = OpConstantComposite %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v3half %half_0x1_8p_0 %half_0x1_8p_0 %half_0x1_8p_0
 %_ptr_Function_v3half = OpTypePointer Function %v3half
          %19 = OpConstantNull %v3half
          %24 = OpTypeFunction %v4float

test/tint/builtins/gen/var/trunc/103ab8.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn trunc_103ab8() {
-  var arg_0 = vec3<f16>(1.0h);
+  var arg_0 = vec3<f16>(1.5h);
   var res : vec3<f16> = trunc(arg_0);
 }
 

test/tint/builtins/gen/var/trunc/117396.wgsl

@@ -0,0 +1,44 @@
+// 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 trunc(vec<3, fa>) -> vec<3, fa>
+fn trunc_117396() {
+  const arg_0 = vec3(1.5);
+  var res = trunc(arg_0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_117396();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_117396();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_117396();
+}

test/tint/builtins/gen/var/trunc/117396.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_117396() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_117396();
+  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() {
+  trunc_117396();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_117396();
+  return;
+}

test/tint/builtins/gen/var/trunc/117396.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void trunc_117396() {
+  float3 res = (1.0f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  trunc_117396();
+  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() {
+  trunc_117396();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  trunc_117396();
+  return;
+}

test/tint/builtins/gen/var/trunc/117396.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void trunc_117396() {
+  vec3 res = vec3(1.0f);
+}
+
+vec4 vertex_main() {
+  trunc_117396();
+  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 trunc_117396() {
+  vec3 res = vec3(1.0f);
+}
+
+void fragment_main() {
+  trunc_117396();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void trunc_117396() {
+  vec3 res = vec3(1.0f);
+}
+
+void compute_main() {
+  trunc_117396();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/var/trunc/117396.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void trunc_117396() {
+  float3 res = float3(1.0f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  trunc_117396();
+  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() {
+  trunc_117396();
+  return;
+}
+
+kernel void compute_main() {
+  trunc_117396();
+  return;
+}
+

test/tint/builtins/gen/var/trunc/117396.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 %trunc_117396 "trunc_117396"
+               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
+%trunc_117396 = 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 %trunc_117396
+               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 %trunc_117396
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %30 = OpLabel
+         %31 = OpFunctionCall %void %trunc_117396
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/var/trunc/117396.wgsl.expected.wgsl

@@ -0,0 +1,20 @@
+fn trunc_117396() {
+  const arg_0 = vec3(1.5);
+  var res = trunc(arg_0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  trunc_117396();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  trunc_117396();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  trunc_117396();
+}

test/tint/builtins/gen/var/trunc/562d05.wgsl

@@ -23,7 +23,7 @@
 
 // fn trunc(vec<3, f32>) -> vec<3, f32>
 fn trunc_562d05() {
-  var arg_0 = vec3<f32>(1.f);
+  var arg_0 = vec3<f32>(1.5f);
   var res: vec3<f32> = trunc(arg_0);
 }
 

test/tint/builtins/gen/var/trunc/562d05.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void trunc_562d05() {
-  float3 arg_0 = (1.0f).xxx;
+  float3 arg_0 = (1.5f).xxx;
   float3 res = trunc(arg_0);
 }