tint: const eval of fract

Bug: tint:1581
Change-Id: I14207080b14e45e7520f50230c85cd902f25dc71
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/113943
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/tint/intrinsics.def

@@ -494,8 +494,8 @@ fn dot4U8Packed(u32, u32) -> u32
 @const fn floor<N: num, T: fa_f32_f16>(@test_value(1.5) vec<N, T>) -> vec<N, T>
 @const fn fma<T: fa_f32_f16>(T, T, T) -> T
 @const fn fma<N: num, T: fa_f32_f16>(vec<N, T>, vec<N, T>, vec<N, T>) -> vec<N, T>
-fn fract<T: f32_f16>(T) -> T
+@const fn fract<T: fa_f32_f16>(@test_value(1.25) T) -> T
-fn fract<N: num, T: f32_f16>(vec<N, T>) -> vec<N, T>
+@const fn fract<N: num, T: fa_f32_f16>(@test_value(1.25) vec<N, T>) -> vec<N, T>
 @const fn frexp<T: fa_f32_f16>(T) -> __frexp_result<T>
 @const fn frexp<N: num, T: fa_f32_f16>(vec<N, T>) -> __frexp_result_vec<N, T>
 @stage("fragment") fn fwidth(f32) -> f32

src/tint/resolver/const_eval.cc

@@ -2680,6 +2680,20 @@ ConstEval::Result ConstEval::fma(const type::Type* ty,
     return TransformElements(builder, ty, transform, args[0], args[1], args[2]);
 }
 
+ConstEval::Result ConstEval::fract(const type::Type* ty,
+                                   utils::VectorRef<const constant::Constant*> args,
+                                   const Source& source) {
+    auto transform = [&](const constant::Constant* c1) {
+        auto create = [&](auto e) -> ImplResult {
+            using NumberT = decltype(e);
+            auto r = e - std::floor(e);
+            return CreateElement(builder, source, c1->Type(), NumberT{r});
+        };
+        return Dispatch_fa_f32_f16(create, c1);
+    };
+    return TransformElements(builder, ty, transform, args[0]);
+}
+
 ConstEval::Result ConstEval::frexp(const type::Type* ty,
                                    utils::VectorRef<const constant::Constant*> args,
                                    const Source& source) {

src/tint/resolver/const_eval.h

@@ -689,6 +689,15 @@ class ConstEval {
                utils::VectorRef<const constant::Constant*> args,
                const Source& source);
 
+    /// fract 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 fract(const type::Type* ty,
+                 utils::VectorRef<const constant::Constant*> args,
+                 const Source& source);
+
     /// frexp builtin
     /// @param ty the expression type
     /// @param args the input arguments

src/tint/resolver/const_eval_builtin_test.cc

@@ -1172,6 +1172,38 @@ INSTANTIATE_TEST_SUITE_P(  //
                                               FmaCases<f32>(),
                                               FmaCases<f16>()))));
 
+template <typename T>
+std::vector<Case> FractCases() {
+    auto r = std::vector<Case>{
+        C({T(0)}, T(0)),
+        C({T(0.1)}, T(0.1)),
+        C({T(-0.1)}, T(0.9)),
+        C({T(0.0000001)}, T(0.0000001)),
+        C({T(-0.0000001)}, T(0.9999999)),
+        C({T(12.34567)}, T(0.34567)).FloatComp(0.002),
+        C({T(-12.34567)}, T(0.65433)).FloatComp(0.002),
+        C({T::Lowest()}, T(0)),
+        C({T::Highest()}, T(0)),
+        // Vector tests
+        C({Vec(T(0.1), T(-0.1), T(-0.0000001))}, Vec(T(0.1), T(0.9), T(0.9999999))),
+    };
+    // Note: Valid results are in the closed interval [0, 1.0]. For example, if e is a very small
+    // negative number, then fract(e) may be 1.0.
+    ConcatIntoIf<!std::is_same_v<T, f16>>(  //
+        r, std::vector<Case>{
+               C({T(-0.000000000000000001)}, T(1)),
+           });
+
+    return r;
+}
+INSTANTIATE_TEST_SUITE_P(  //
+    Fract,
+    ResolverConstEvalBuiltinTest,
+    testing::Combine(testing::Values(sem::BuiltinType::kFract),
+                     testing::ValuesIn(Concat(FractCases<AFloat>(),  //
+                                              FractCases<f32>(),
+                                              FractCases<f16>()))));
+
 template <typename T>
 std::vector<Case> FrexpCases() {
     using F = T;                                                         // fract type

src/tint/resolver/intrinsic_table.inl

@@ -12461,24 +12461,24 @@ constexpr OverloadInfo kOverloads[] = {
     /* num parameters */ 1,
     /* num template types */ 1,
     /* num template numbers */ 0,
-    /* template types */ &kTemplateTypes[26],
+    /* template types */ &kTemplateTypes[23],
     /* template numbers */ &kTemplateNumbers[10],
     /* parameters */ &kParameters[856],
     /* return matcher indices */ &kMatcherIndices[3],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::fract,
   },
   {
     /* [348] */
     /* num parameters */ 1,
     /* num template types */ 1,
     /* num template numbers */ 1,
-    /* template types */ &kTemplateTypes[26],
+    /* template types */ &kTemplateTypes[23],
     /* template numbers */ &kTemplateNumbers[4],
     /* parameters */ &kParameters[857],
     /* return matcher indices */ &kMatcherIndices[30],
     /* flags */ OverloadFlags(OverloadFlag::kIsBuiltin, OverloadFlag::kSupportsVertexPipeline, OverloadFlag::kSupportsFragmentPipeline, OverloadFlag::kSupportsComputePipeline),
-    /* const eval */ nullptr,
+    /* const eval */ &ConstEval::fract,
   },
   {
     /* [349] */
@@ -14203,8 +14203,8 @@ constexpr IntrinsicInfo kBuiltins[] = {
   },
   {
     /* [39] */
-    /* fn fract<T : f32_f16>(T) -> T */
+    /* fn fract<T : fa_f32_f16>(@test_value(1.25) T) -> T */
-    /* fn fract<N : num, T : f32_f16>(vec<N, T>) -> vec<N, T> */
+    /* fn fract<N : num, T : fa_f32_f16>(@test_value(1.25) vec<N, T>) -> vec<N, T> */
     /* num overloads */ 2,
     /* overloads */ &kOverloads[347],
   },

test/tint/builtins/gen/literal/fract/181aa9.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn fract(vec<2, f16>) -> vec<2, f16>
 fn fract_181aa9() {
-  var res: vec2<f16> = fract(vec2<f16>(1.h));
+  var res: vec2<f16> = fract(vec2<f16>(1.25h));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/181aa9.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_181aa9() {
-  vector<float16_t, 2> res = frac((float16_t(1.0h)).xx);
+  vector<float16_t, 2> res = (float16_t(0.25h)).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/181aa9.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_181aa9() {
-  f16vec2 res = fract(f16vec2(1.0hf));
+  f16vec2 res = f16vec2(0.25hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void fract_181aa9() {
-  f16vec2 res = fract(f16vec2(1.0hf));
+  f16vec2 res = f16vec2(0.25hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_181aa9() {
-  f16vec2 res = fract(f16vec2(1.0hf));
+  f16vec2 res = f16vec2(0.25hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/181aa9.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_181aa9() {
-  half2 res = fract(half2(1.0h));
+  half2 res = half2(0.25h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/181aa9.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"
@@ -37,38 +36,37 @@
           %9 = OpTypeFunction %void
        %half = OpTypeFloat 16
      %v2half = OpTypeVector %half 2
-%half_0x1p_0 = OpConstant %half 0x1p+0
+%half_0x1pn2 = OpConstant %half 0x1p-2
-         %18 = OpConstantComposite %v2half %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v2half %half_0x1pn2 %half_0x1pn2
 %_ptr_Function_v2half = OpTypePointer Function %v2half
-         %21 = OpConstantNull %v2half
+         %19 = OpConstantNull %v2half
-         %22 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
 %fract_181aa9 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v2half Function %21
+        %res = OpVariable %_ptr_Function_v2half Function %19
-         %13 = OpExtInst %v2half %16 Fract %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 %fract_181aa9
+         %23 = OpFunctionCall %void %fract_181aa9
                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 %fract_181aa9
+         %30 = OpFunctionCall %void %fract_181aa9
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %fract_181aa9
+         %33 = OpFunctionCall %void %fract_181aa9
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/181aa9.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn fract_181aa9() {
-  var res : vec2<f16> = fract(vec2<f16>(1.0h));
+  var res : vec2<f16> = fract(vec2<f16>(1.25h));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/2eddfe.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 fract(fa) -> fa
+fn fract_2eddfe() {
+  var res = fract(1.25);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_2eddfe();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_2eddfe();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_2eddfe();
+}

test/tint/builtins/gen/literal/fract/2eddfe.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_2eddfe();
+  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() {
+  fract_2eddfe();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_2eddfe();
+  return;
+}

test/tint/builtins/gen/literal/fract/2eddfe.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_2eddfe();
+  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() {
+  fract_2eddfe();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_2eddfe();
+  return;
+}

test/tint/builtins/gen/literal/fract/2eddfe.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+vec4 vertex_main() {
+  fract_2eddfe();
+  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 fract_2eddfe() {
+  float res = 0.25f;
+}
+
+void fragment_main() {
+  fract_2eddfe();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+void compute_main() {
+  fract_2eddfe();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/fract/2eddfe.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  fract_2eddfe();
+  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() {
+  fract_2eddfe();
+  return;
+}
+
+kernel void compute_main() {
+  fract_2eddfe();
+  return;
+}
+

test/tint/builtins/gen/literal/fract/2eddfe.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 %fract_2eddfe "fract_2eddfe"
+               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_0_25 = OpConstant %float 0.25
+%_ptr_Function_float = OpTypePointer Function %float
+         %16 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
+%fract_2eddfe = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_float Function %8
+               OpStore %res %float_0_25
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %16
+         %18 = OpLabel
+         %19 = OpFunctionCall %void %fract_2eddfe
+               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
+         %25 = OpLabel
+         %26 = OpFunctionCall %void %fract_2eddfe
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %fract_2eddfe
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/fract/2eddfe.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn fract_2eddfe() {
+  var res = fract(1.25);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_2eddfe();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_2eddfe();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_2eddfe();
+}

test/tint/builtins/gen/literal/fract/498c77.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn fract(vec<4, f16>) -> vec<4, f16>
 fn fract_498c77() {
-  var res: vec4<f16> = fract(vec4<f16>(1.h));
+  var res: vec4<f16> = fract(vec4<f16>(1.25h));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/498c77.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_498c77() {
-  vector<float16_t, 4> res = frac((float16_t(1.0h)).xxxx);
+  vector<float16_t, 4> res = (float16_t(0.25h)).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/498c77.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_498c77() {
-  f16vec4 res = fract(f16vec4(1.0hf));
+  f16vec4 res = f16vec4(0.25hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void fract_498c77() {
-  f16vec4 res = fract(f16vec4(1.0hf));
+  f16vec4 res = f16vec4(0.25hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_498c77() {
-  f16vec4 res = fract(f16vec4(1.0hf));
+  f16vec4 res = f16vec4(0.25hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/498c77.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_498c77() {
-  half4 res = fract(half4(1.0h));
+  half4 res = half4(0.25h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/498c77.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"
@@ -37,38 +36,37 @@
           %9 = OpTypeFunction %void
        %half = OpTypeFloat 16
      %v4half = OpTypeVector %half 4
-%half_0x1p_0 = OpConstant %half 0x1p+0
+%half_0x1pn2 = OpConstant %half 0x1p-2
-         %18 = OpConstantComposite %v4half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v4half %half_0x1pn2 %half_0x1pn2 %half_0x1pn2 %half_0x1pn2
 %_ptr_Function_v4half = OpTypePointer Function %v4half
-         %21 = OpConstantNull %v4half
+         %19 = OpConstantNull %v4half
-         %22 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
 %fract_498c77 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v4half Function %21
+        %res = OpVariable %_ptr_Function_v4half Function %19
-         %13 = OpExtInst %v4half %16 Fract %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 %fract_498c77
+         %23 = OpFunctionCall %void %fract_498c77
                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 %fract_498c77
+         %30 = OpFunctionCall %void %fract_498c77
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %fract_498c77
+         %33 = OpFunctionCall %void %fract_498c77
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/498c77.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn fract_498c77() {
-  var res : vec4<f16> = fract(vec4<f16>(1.0h));
+  var res : vec4<f16> = fract(vec4<f16>(1.25h));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/7e3f2d.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 fract(vec<4, fa>) -> vec<4, fa>
+fn fract_7e3f2d() {
+  var res = fract(vec4(1.25));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_7e3f2d();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_7e3f2d();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_7e3f2d();
+}

test/tint/builtins/gen/literal/fract/7e3f2d.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void fract_7e3f2d() {
+  float4 res = (0.25f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_7e3f2d();
+  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() {
+  fract_7e3f2d();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_7e3f2d();
+  return;
+}

test/tint/builtins/gen/literal/fract/7e3f2d.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void fract_7e3f2d() {
+  float4 res = (0.25f).xxxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_7e3f2d();
+  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() {
+  fract_7e3f2d();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_7e3f2d();
+  return;
+}

test/tint/builtins/gen/literal/fract/7e3f2d.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void fract_7e3f2d() {
+  vec4 res = vec4(0.25f);
+}
+
+vec4 vertex_main() {
+  fract_7e3f2d();
+  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 fract_7e3f2d() {
+  vec4 res = vec4(0.25f);
+}
+
+void fragment_main() {
+  fract_7e3f2d();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void fract_7e3f2d() {
+  vec4 res = vec4(0.25f);
+}
+
+void compute_main() {
+  fract_7e3f2d();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/fract/7e3f2d.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void fract_7e3f2d() {
+  float4 res = float4(0.25f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  fract_7e3f2d();
+  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() {
+  fract_7e3f2d();
+  return;
+}
+
+kernel void compute_main() {
+  fract_7e3f2d();
+  return;
+}
+

test/tint/builtins/gen/literal/fract/7e3f2d.wgsl.expected.spvasm

@@ -0,0 +1,65 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 31
+; 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 %fract_7e3f2d "fract_7e3f2d"
+               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_0_25 = OpConstant %float 0.25
+         %14 = OpConstantComposite %v4float %float_0_25 %float_0_25 %float_0_25 %float_0_25
+%_ptr_Function_v4float = OpTypePointer Function %v4float
+         %17 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
+%fract_7e3f2d = 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 %fract_7e3f2d
+               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
+         %26 = OpLabel
+         %27 = OpFunctionCall %void %fract_7e3f2d
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %29 = OpLabel
+         %30 = OpFunctionCall %void %fract_7e3f2d
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/fract/7e3f2d.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn fract_7e3f2d() {
+  var res = fract(vec4(1.25));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_7e3f2d();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_7e3f2d();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_7e3f2d();
+}

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl

@@ -23,7 +23,7 @@
 
 // fn fract(vec<4, f32>) -> vec<4, f32>
 fn fract_8bc1e9() {
-  var res: vec4<f32> = fract(vec4<f32>(1.f));
+  var res: vec4<f32> = fract(vec4<f32>(1.25f));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_8bc1e9() {
-  float4 res = frac((1.0f).xxxx);
+  float4 res = (0.25f).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void fract_8bc1e9() {
-  float4 res = frac((1.0f).xxxx);
+  float4 res = (0.25f).xxxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void fract_8bc1e9() {
-  vec4 res = fract(vec4(1.0f));
+  vec4 res = vec4(0.25f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void fract_8bc1e9() {
-  vec4 res = fract(vec4(1.0f));
+  vec4 res = vec4(0.25f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void fract_8bc1e9() {
-  vec4 res = fract(vec4(1.0f));
+  vec4 res = vec4(0.25f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_8bc1e9() {
-  float4 res = fract(float4(1.0f));
+  float4 res = float4(0.25f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 32
+; Bound: 31
 ; 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"
@@ -31,36 +30,36 @@
 %vertex_point_size = OpVariable %_ptr_Output_float Output %8
        %void = OpTypeVoid
           %9 = OpTypeFunction %void
-    %float_1 = OpConstant %float 1
+ %float_0_25 = OpConstant %float 0.25
-         %16 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
+         %14 = OpConstantComposite %v4float %float_0_25 %float_0_25 %float_0_25 %float_0_25
 %_ptr_Function_v4float = OpTypePointer Function %v4float
-         %19 = OpTypeFunction %v4float
+         %17 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
 %fract_8bc1e9 = OpFunction %void None %9
          %12 = OpLabel
         %res = OpVariable %_ptr_Function_v4float Function %5
-         %13 = OpExtInst %v4float %14 Fract %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 %fract_8bc1e9
+         %20 = OpFunctionCall %void %fract_8bc1e9
                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
+         %26 = OpLabel
-         %28 = OpFunctionCall %void %fract_8bc1e9
+         %27 = OpFunctionCall %void %fract_8bc1e9
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %30 = OpLabel
+         %29 = OpLabel
-         %31 = OpFunctionCall %void %fract_8bc1e9
+         %30 = OpFunctionCall %void %fract_8bc1e9
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/8bc1e9.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn fract_8bc1e9() {
-  var res : vec4<f32> = fract(vec4<f32>(1.0f));
+  var res : vec4<f32> = fract(vec4<f32>(1.25f));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/943cb1.wgsl

@@ -23,7 +23,7 @@
 
 // fn fract(vec<2, f32>) -> vec<2, f32>
 fn fract_943cb1() {
-  var res: vec2<f32> = fract(vec2<f32>(1.f));
+  var res: vec2<f32> = fract(vec2<f32>(1.25f));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/943cb1.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_943cb1() {
-  float2 res = frac((1.0f).xx);
+  float2 res = (0.25f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/943cb1.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void fract_943cb1() {
-  float2 res = frac((1.0f).xx);
+  float2 res = (0.25f).xx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/943cb1.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void fract_943cb1() {
-  vec2 res = fract(vec2(1.0f));
+  vec2 res = vec2(0.25f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void fract_943cb1() {
-  vec2 res = fract(vec2(1.0f));
+  vec2 res = vec2(0.25f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void fract_943cb1() {
-  vec2 res = fract(vec2(1.0f));
+  vec2 res = vec2(0.25f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/943cb1.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_943cb1() {
-  float2 res = fract(float2(1.0f));
+  float2 res = float2(0.25f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/943cb1.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 34
+; Bound: 33
 ; 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"
@@ -32,37 +31,37 @@
        %void = OpTypeVoid
           %9 = OpTypeFunction %void
     %v2float = OpTypeVector %float 2
-    %float_1 = OpConstant %float 1
+ %float_0_25 = OpConstant %float 0.25
-         %17 = OpConstantComposite %v2float %float_1 %float_1
+         %15 = OpConstantComposite %v2float %float_0_25 %float_0_25
 %_ptr_Function_v2float = OpTypePointer Function %v2float
-         %20 = OpConstantNull %v2float
+         %18 = OpConstantNull %v2float
-         %21 = OpTypeFunction %v4float
+         %19 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
 %fract_943cb1 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v2float Function %20
+        %res = OpVariable %_ptr_Function_v2float Function %18
-         %13 = OpExtInst %v2float %15 Fract %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 %fract_943cb1
+         %22 = OpFunctionCall %void %fract_943cb1
                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
+         %28 = OpLabel
-         %30 = OpFunctionCall %void %fract_943cb1
+         %29 = OpFunctionCall %void %fract_943cb1
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %31 = OpLabel
-         %33 = OpFunctionCall %void %fract_943cb1
+         %32 = OpFunctionCall %void %fract_943cb1
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/943cb1.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn fract_943cb1() {
-  var res : vec2<f32> = fract(vec2<f32>(1.0f));
+  var res : vec2<f32> = fract(vec2<f32>(1.25f));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/958a1d.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn fract(vec<3, f16>) -> vec<3, f16>
 fn fract_958a1d() {
-  var res: vec3<f16> = fract(vec3<f16>(1.h));
+  var res: vec3<f16> = fract(vec3<f16>(1.25h));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/958a1d.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_958a1d() {
-  vector<float16_t, 3> res = frac((float16_t(1.0h)).xxx);
+  vector<float16_t, 3> res = (float16_t(0.25h)).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/958a1d.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_958a1d() {
-  f16vec3 res = fract(f16vec3(1.0hf));
+  f16vec3 res = f16vec3(0.25hf);
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void fract_958a1d() {
-  f16vec3 res = fract(f16vec3(1.0hf));
+  f16vec3 res = f16vec3(0.25hf);
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_958a1d() {
-  f16vec3 res = fract(f16vec3(1.0hf));
+  f16vec3 res = f16vec3(0.25hf);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/958a1d.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_958a1d() {
-  half3 res = fract(half3(1.0h));
+  half3 res = half3(0.25h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/958a1d.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"
@@ -37,38 +36,37 @@
           %9 = OpTypeFunction %void
        %half = OpTypeFloat 16
      %v3half = OpTypeVector %half 3
-%half_0x1p_0 = OpConstant %half 0x1p+0
+%half_0x1pn2 = OpConstant %half 0x1p-2
-         %18 = OpConstantComposite %v3half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v3half %half_0x1pn2 %half_0x1pn2 %half_0x1pn2
 %_ptr_Function_v3half = OpTypePointer Function %v3half
-         %21 = OpConstantNull %v3half
+         %19 = OpConstantNull %v3half
-         %22 = OpTypeFunction %v4float
+         %20 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
 %fract_958a1d = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v3half Function %21
+        %res = OpVariable %_ptr_Function_v3half Function %19
-         %13 = OpExtInst %v3half %16 Fract %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 %fract_958a1d
+         %23 = OpFunctionCall %void %fract_958a1d
                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 %fract_958a1d
+         %30 = OpFunctionCall %void %fract_958a1d
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %34 = OpLabel
+         %32 = OpLabel
-         %35 = OpFunctionCall %void %fract_958a1d
+         %33 = OpFunctionCall %void %fract_958a1d
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/958a1d.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn fract_958a1d() {
-  var res : vec3<f16> = fract(vec3<f16>(1.0h));
+  var res : vec3<f16> = fract(vec3<f16>(1.25h));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/a49758.wgsl

@@ -23,7 +23,7 @@
 
 // fn fract(vec<3, f32>) -> vec<3, f32>
 fn fract_a49758() {
-  var res: vec3<f32> = fract(vec3<f32>(1.f));
+  var res: vec3<f32> = fract(vec3<f32>(1.25f));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/a49758.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_a49758() {
-  float3 res = frac((1.0f).xxx);
+  float3 res = (0.25f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/a49758.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void fract_a49758() {
-  float3 res = frac((1.0f).xxx);
+  float3 res = (0.25f).xxx;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/a49758.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void fract_a49758() {
-  vec3 res = fract(vec3(1.0f));
+  vec3 res = vec3(0.25f);
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void fract_a49758() {
-  vec3 res = fract(vec3(1.0f));
+  vec3 res = vec3(0.25f);
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void fract_a49758() {
-  vec3 res = fract(vec3(1.0f));
+  vec3 res = vec3(0.25f);
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/a49758.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_a49758() {
-  float3 res = fract(float3(1.0f));
+  float3 res = float3(0.25f);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/a49758.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 34
+; Bound: 33
 ; 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"
@@ -32,37 +31,37 @@
        %void = OpTypeVoid
           %9 = OpTypeFunction %void
     %v3float = OpTypeVector %float 3
-    %float_1 = OpConstant %float 1
+ %float_0_25 = OpConstant %float 0.25
-         %17 = OpConstantComposite %v3float %float_1 %float_1 %float_1
+         %15 = OpConstantComposite %v3float %float_0_25 %float_0_25 %float_0_25
 %_ptr_Function_v3float = OpTypePointer Function %v3float
-         %20 = OpConstantNull %v3float
+         %18 = OpConstantNull %v3float
-         %21 = OpTypeFunction %v4float
+         %19 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
 %fract_a49758 = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_v3float Function %20
+        %res = OpVariable %_ptr_Function_v3float Function %18
-         %13 = OpExtInst %v3float %15 Fract %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 %fract_a49758
+         %22 = OpFunctionCall %void %fract_a49758
                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
+         %28 = OpLabel
-         %30 = OpFunctionCall %void %fract_a49758
+         %29 = OpFunctionCall %void %fract_a49758
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %31 = OpLabel
-         %33 = OpFunctionCall %void %fract_a49758
+         %32 = OpFunctionCall %void %fract_a49758
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/a49758.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn fract_a49758() {
-  var res : vec3<f32> = fract(vec3<f32>(1.0f));
+  var res : vec3<f32> = fract(vec3<f32>(1.25f));
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/eb38ce.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn fract(f16) -> f16
 fn fract_eb38ce() {
-  var res: f16 = fract(1.h);
+  var res: f16 = fract(1.25h);
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/eb38ce.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_eb38ce() {
-  float16_t res = frac(float16_t(1.0h));
+  float16_t res = float16_t(0.25h);
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/eb38ce.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_eb38ce() {
-  float16_t res = fract(1.0hf);
+  float16_t res = 0.25hf;
 }
 
 vec4 vertex_main() {
@@ -23,7 +23,7 @@ void main() {
 precision mediump float;
 
 void fract_eb38ce() {
-  float16_t res = fract(1.0hf);
+  float16_t res = 0.25hf;
 }
 
 void fragment_main() {
@@ -38,7 +38,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_eb38ce() {
-  float16_t res = fract(1.0hf);
+  float16_t res = 0.25hf;
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/eb38ce.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_eb38ce() {
-  half res = fract(1.0h);
+  half res = 0.25h;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/eb38ce.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"
@@ -36,37 +35,36 @@
        %void = OpTypeVoid
           %9 = OpTypeFunction %void
        %half = OpTypeFloat 16
-%half_0x1p_0 = OpConstant %half 0x1p+0
+%half_0x1pn2 = OpConstant %half 0x1p-2
 %_ptr_Function_half = OpTypePointer Function %half
-         %19 = OpConstantNull %half
+         %17 = OpConstantNull %half
-         %20 = OpTypeFunction %v4float
+         %18 = OpTypeFunction %v4float
     %float_1 = OpConstant %float 1
 %fract_eb38ce = OpFunction %void None %9
          %12 = OpLabel
-        %res = OpVariable %_ptr_Function_half Function %19
+        %res = OpVariable %_ptr_Function_half Function %17
-         %13 = OpExtInst %half %15 Fract %half_0x1p_0
+               OpStore %res %half_0x1pn2
-               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 %fract_eb38ce
+         %21 = OpFunctionCall %void %fract_eb38ce
                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 %fract_eb38ce
+         %28 = OpFunctionCall %void %fract_eb38ce
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %32 = OpLabel
+         %30 = OpLabel
-         %33 = OpFunctionCall %void %fract_eb38ce
+         %31 = OpFunctionCall %void %fract_eb38ce
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/eb38ce.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn fract_eb38ce() {
-  var res : f16 = fract(1.0h);
+  var res : f16 = fract(1.25h);
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/ed00ca.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 fract(vec<2, fa>) -> vec<2, fa>
+fn fract_ed00ca() {
+  var res = fract(vec2(1.25));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_ed00ca();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_ed00ca();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_ed00ca();
+}

test/tint/builtins/gen/literal/fract/ed00ca.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void fract_ed00ca() {
+  float2 res = (0.25f).xx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_ed00ca();
+  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() {
+  fract_ed00ca();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_ed00ca();
+  return;
+}

test/tint/builtins/gen/literal/fract/ed00ca.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void fract_ed00ca() {
+  float2 res = (0.25f).xx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_ed00ca();
+  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() {
+  fract_ed00ca();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_ed00ca();
+  return;
+}

test/tint/builtins/gen/literal/fract/ed00ca.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void fract_ed00ca() {
+  vec2 res = vec2(0.25f);
+}
+
+vec4 vertex_main() {
+  fract_ed00ca();
+  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 fract_ed00ca() {
+  vec2 res = vec2(0.25f);
+}
+
+void fragment_main() {
+  fract_ed00ca();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void fract_ed00ca() {
+  vec2 res = vec2(0.25f);
+}
+
+void compute_main() {
+  fract_ed00ca();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/fract/ed00ca.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void fract_ed00ca() {
+  float2 res = float2(0.25f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  fract_ed00ca();
+  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() {
+  fract_ed00ca();
+  return;
+}
+
+kernel void compute_main() {
+  fract_ed00ca();
+  return;
+}
+

test/tint/builtins/gen/literal/fract/ed00ca.wgsl.expected.spvasm

@@ -0,0 +1,67 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 33
+; 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 %fract_ed00ca "fract_ed00ca"
+               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_0_25 = OpConstant %float 0.25
+         %15 = OpConstantComposite %v2float %float_0_25 %float_0_25
+%_ptr_Function_v2float = OpTypePointer Function %v2float
+         %18 = OpConstantNull %v2float
+         %19 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
+%fract_ed00ca = 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 %fract_ed00ca
+               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
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %fract_ed00ca
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %31 = OpLabel
+         %32 = OpFunctionCall %void %fract_ed00ca
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/fract/ed00ca.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn fract_ed00ca() {
+  var res = fract(vec2(1.25));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_ed00ca();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_ed00ca();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_ed00ca();
+}

test/tint/builtins/gen/literal/fract/ed2f79.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 fract(vec<3, fa>) -> vec<3, fa>
+fn fract_ed2f79() {
+  var res = fract(vec3(1.25));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_ed2f79();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_ed2f79();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_ed2f79();
+}

test/tint/builtins/gen/literal/fract/ed2f79.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void fract_ed2f79() {
+  float3 res = (0.25f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_ed2f79();
+  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() {
+  fract_ed2f79();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_ed2f79();
+  return;
+}

test/tint/builtins/gen/literal/fract/ed2f79.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void fract_ed2f79() {
+  float3 res = (0.25f).xxx;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_ed2f79();
+  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() {
+  fract_ed2f79();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_ed2f79();
+  return;
+}

test/tint/builtins/gen/literal/fract/ed2f79.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void fract_ed2f79() {
+  vec3 res = vec3(0.25f);
+}
+
+vec4 vertex_main() {
+  fract_ed2f79();
+  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 fract_ed2f79() {
+  vec3 res = vec3(0.25f);
+}
+
+void fragment_main() {
+  fract_ed2f79();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void fract_ed2f79() {
+  vec3 res = vec3(0.25f);
+}
+
+void compute_main() {
+  fract_ed2f79();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/literal/fract/ed2f79.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void fract_ed2f79() {
+  float3 res = float3(0.25f);
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  fract_ed2f79();
+  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() {
+  fract_ed2f79();
+  return;
+}
+
+kernel void compute_main() {
+  fract_ed2f79();
+  return;
+}
+

test/tint/builtins/gen/literal/fract/ed2f79.wgsl.expected.spvasm

@@ -0,0 +1,67 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 33
+; 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 %fract_ed2f79 "fract_ed2f79"
+               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_0_25 = OpConstant %float 0.25
+         %15 = OpConstantComposite %v3float %float_0_25 %float_0_25 %float_0_25
+%_ptr_Function_v3float = OpTypePointer Function %v3float
+         %18 = OpConstantNull %v3float
+         %19 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
+%fract_ed2f79 = 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 %fract_ed2f79
+               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
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %fract_ed2f79
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %31 = OpLabel
+         %32 = OpFunctionCall %void %fract_ed2f79
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/literal/fract/ed2f79.wgsl.expected.wgsl

@@ -0,0 +1,19 @@
+fn fract_ed2f79() {
+  var res = fract(vec3(1.25));
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_ed2f79();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_ed2f79();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_ed2f79();
+}

test/tint/builtins/gen/literal/fract/fa5c71.wgsl

@@ -23,7 +23,7 @@
 
 // fn fract(f32) -> f32
 fn fract_fa5c71() {
-  var res: f32 = fract(1.f);
+  var res: f32 = fract(1.25f);
 }
 
 @vertex

test/tint/builtins/gen/literal/fract/fa5c71.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_fa5c71() {
-  float res = frac(1.0f);
+  float res = 0.25f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/fa5c71.wgsl.expected.fxc.hlsl

@@ -1,5 +1,5 @@
 void fract_fa5c71() {
-  float res = frac(1.0f);
+  float res = 0.25f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/fa5c71.wgsl.expected.glsl

@@ -1,7 +1,7 @@
 #version 310 es
 
 void fract_fa5c71() {
-  float res = fract(1.0f);
+  float res = 0.25f;
 }
 
 vec4 vertex_main() {
@@ -21,7 +21,7 @@ void main() {
 precision mediump float;
 
 void fract_fa5c71() {
-  float res = fract(1.0f);
+  float res = 0.25f;
 }
 
 void fragment_main() {
@@ -35,7 +35,7 @@ void main() {
 #version 310 es
 
 void fract_fa5c71() {
-  float res = fract(1.0f);
+  float res = 0.25f;
 }
 
 void compute_main() {

test/tint/builtins/gen/literal/fract/fa5c71.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_fa5c71() {
-  float res = fract(1.0f);
+  float res = 0.25f;
 }
 
 struct tint_symbol {

test/tint/builtins/gen/literal/fract/fa5c71.wgsl.expected.spvasm

@@ -1,10 +1,9 @@
 ; SPIR-V
 ; Version: 1.3
 ; Generator: Google Tint Compiler; 0
-; Bound: 31
+; 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"
@@ -31,35 +30,35 @@
 %vertex_point_size = OpVariable %_ptr_Output_float Output %8
        %void = OpTypeVoid
           %9 = OpTypeFunction %void
-    %float_1 = OpConstant %float 1
+ %float_0_25 = OpConstant %float 0.25
 %_ptr_Function_float = OpTypePointer Function %float
-         %18 = OpTypeFunction %v4float
+         %16 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
 %fract_fa5c71 = OpFunction %void None %9
          %12 = OpLabel
         %res = OpVariable %_ptr_Function_float Function %8
-         %13 = OpExtInst %float %14 Fract %float_1
+               OpStore %res %float_0_25
-               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 %fract_fa5c71
+         %19 = OpFunctionCall %void %fract_fa5c71
                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
+         %25 = OpLabel
-         %27 = OpFunctionCall %void %fract_fa5c71
+         %26 = OpFunctionCall %void %fract_fa5c71
                OpReturn
                OpFunctionEnd
 %compute_main = OpFunction %void None %9
-         %29 = OpLabel
+         %28 = OpLabel
-         %30 = OpFunctionCall %void %fract_fa5c71
+         %29 = OpFunctionCall %void %fract_fa5c71
                OpReturn
                OpFunctionEnd

test/tint/builtins/gen/literal/fract/fa5c71.wgsl.expected.wgsl

@@ -1,5 +1,5 @@
 fn fract_fa5c71() {
-  var res : f32 = fract(1.0f);
+  var res : f32 = fract(1.25f);
 }
 
 @vertex

test/tint/builtins/gen/var/fract/181aa9.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn fract(vec<2, f16>) -> vec<2, f16>
 fn fract_181aa9() {
-  var arg_0 = vec2<f16>(1.h);
+  var arg_0 = vec2<f16>(1.25h);
   var res: vec2<f16> = fract(arg_0);
 }
 

test/tint/builtins/gen/var/fract/181aa9.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_181aa9() {
-  vector<float16_t, 2> arg_0 = (float16_t(1.0h)).xx;
+  vector<float16_t, 2> arg_0 = (float16_t(1.25h)).xx;
   vector<float16_t, 2> res = frac(arg_0);
 }
 

test/tint/builtins/gen/var/fract/181aa9.wgsl.expected.glsl

@@ -2,7 +2,7 @@
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_181aa9() {
-  f16vec2 arg_0 = f16vec2(1.0hf);
+  f16vec2 arg_0 = f16vec2(1.25hf);
   f16vec2 res = fract(arg_0);
 }
 
@@ -24,7 +24,7 @@ void main() {
 precision mediump float;
 
 void fract_181aa9() {
-  f16vec2 arg_0 = f16vec2(1.0hf);
+  f16vec2 arg_0 = f16vec2(1.25hf);
   f16vec2 res = fract(arg_0);
 }
 
@@ -40,7 +40,7 @@ void main() {
 #extension GL_AMD_gpu_shader_half_float : require
 
 void fract_181aa9() {
-  f16vec2 arg_0 = f16vec2(1.0hf);
+  f16vec2 arg_0 = f16vec2(1.25hf);
   f16vec2 res = fract(arg_0);
 }
 

test/tint/builtins/gen/var/fract/181aa9.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 void fract_181aa9() {
-  half2 arg_0 = half2(1.0h);
+  half2 arg_0 = half2(1.25h);
   half2 res = fract(arg_0);
 }
 

test/tint/builtins/gen/var/fract/181aa9.wgsl.expected.spvasm

@@ -38,8 +38,8 @@
           %9 = OpTypeFunction %void
        %half = OpTypeFloat 16
      %v2half = OpTypeVector %half 2
-%half_0x1p_0 = OpConstant %half 0x1p+0
+%half_0x1_4p_0 = OpConstant %half 0x1.4p+0
-         %16 = OpConstantComposite %v2half %half_0x1p_0 %half_0x1p_0
+         %16 = OpConstantComposite %v2half %half_0x1_4p_0 %half_0x1_4p_0
 %_ptr_Function_v2half = OpTypePointer Function %v2half
          %19 = OpConstantNull %v2half
          %24 = OpTypeFunction %v4float

test/tint/builtins/gen/var/fract/181aa9.wgsl.expected.wgsl

@@ -1,7 +1,7 @@
 enable f16;
 
 fn fract_181aa9() {
-  var arg_0 = vec2<f16>(1.0h);
+  var arg_0 = vec2<f16>(1.25h);
   var res : vec2<f16> = fract(arg_0);
 }
 

test/tint/builtins/gen/var/fract/2eddfe.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 fract(fa) -> fa
+fn fract_2eddfe() {
+  const arg_0 = 1.25;
+  var res = fract(arg_0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_2eddfe();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_2eddfe();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_2eddfe();
+}

test/tint/builtins/gen/var/fract/2eddfe.wgsl.expected.dxc.hlsl

@@ -0,0 +1,30 @@
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_2eddfe();
+  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() {
+  fract_2eddfe();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_2eddfe();
+  return;
+}

test/tint/builtins/gen/var/fract/2eddfe.wgsl.expected.fxc.hlsl

@@ -0,0 +1,30 @@
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  fract_2eddfe();
+  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() {
+  fract_2eddfe();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  fract_2eddfe();
+  return;
+}

test/tint/builtins/gen/var/fract/2eddfe.wgsl.expected.glsl

@@ -0,0 +1,49 @@
+#version 310 es
+
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+vec4 vertex_main() {
+  fract_2eddfe();
+  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 fract_2eddfe() {
+  float res = 0.25f;
+}
+
+void fragment_main() {
+  fract_2eddfe();
+}
+
+void main() {
+  fragment_main();
+  return;
+}
+#version 310 es
+
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+void compute_main() {
+  fract_2eddfe();
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  compute_main();
+  return;
+}

test/tint/builtins/gen/var/fract/2eddfe.wgsl.expected.msl

@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void fract_2eddfe() {
+  float res = 0.25f;
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+  fract_2eddfe();
+  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() {
+  fract_2eddfe();
+  return;
+}
+
+kernel void compute_main() {
+  fract_2eddfe();
+  return;
+}
+

test/tint/builtins/gen/var/fract/2eddfe.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 %fract_2eddfe "fract_2eddfe"
+               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_0_25 = OpConstant %float 0.25
+%_ptr_Function_float = OpTypePointer Function %float
+         %16 = OpTypeFunction %v4float
+    %float_1 = OpConstant %float 1
+%fract_2eddfe = OpFunction %void None %9
+         %12 = OpLabel
+        %res = OpVariable %_ptr_Function_float Function %8
+               OpStore %res %float_0_25
+               OpReturn
+               OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %16
+         %18 = OpLabel
+         %19 = OpFunctionCall %void %fract_2eddfe
+               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
+         %25 = OpLabel
+         %26 = OpFunctionCall %void %fract_2eddfe
+               OpReturn
+               OpFunctionEnd
+%compute_main = OpFunction %void None %9
+         %28 = OpLabel
+         %29 = OpFunctionCall %void %fract_2eddfe
+               OpReturn
+               OpFunctionEnd

test/tint/builtins/gen/var/fract/2eddfe.wgsl.expected.wgsl

@@ -0,0 +1,20 @@
+fn fract_2eddfe() {
+  const arg_0 = 1.25;
+  var res = fract(arg_0);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  fract_2eddfe();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  fract_2eddfe();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  fract_2eddfe();
+}

test/tint/builtins/gen/var/fract/498c77.wgsl

@@ -25,7 +25,7 @@ enable f16;
 
 // fn fract(vec<4, f16>) -> vec<4, f16>
 fn fract_498c77() {
-  var arg_0 = vec4<f16>(1.h);
+  var arg_0 = vec4<f16>(1.25h);
   var res: vec4<f16> = fract(arg_0);
 }
 

test/tint/builtins/gen/var/fract/498c77.wgsl.expected.dxc.hlsl

@@ -1,5 +1,5 @@
 void fract_498c77() {
-  vector<float16_t, 4> arg_0 = (float16_t(1.0h)).xxxx;
+  vector<float16_t, 4> arg_0 = (float16_t(1.25h)).xxxx;
   vector<float16_t, 4> res = frac(arg_0);
 }