[wgsl-in] Handle all(bool) and any(bool)

Fixes gfx-rs#1911.

src/front/wgsl/lower/mod.rs

@@ -1696,7 +1696,20 @@ impl<'source, 'temp> Lowerer<'source, 'temp> {
                     let argument = self.expression(args.next()?, ctx.reborrow())?;
                     args.finish()?;
 
-                    crate::Expression::Relational { fun, argument }
+                    // Check for no-op all(bool) and any(bool):
+                    let argument_unmodified = matches!(
+                        fun,
+                        crate::RelationalFunction::All | crate::RelationalFunction::Any
+                    ) && {
+                        ctx.grow_types(argument)?;
+                        matches!(ctx.resolved_inner(argument), &crate::TypeInner::Scalar { kind, .. } if kind == crate::ScalarKind::Bool)
+                    };
+
+                    if argument_unmodified {
+                        return Ok(Some(argument));
+                    } else {
+                        crate::Expression::Relational { fun, argument }
+                    }
                 } else if let Some((axis, ctrl)) = conv::map_derivative(function.name) {
                     let mut args = ctx.prepare_args(arguments, 1, span);
                     let expr = self.expression(args.next()?, ctx.reborrow())?;

tests/in/standard.wgsl

@@ -1,5 +1,11 @@
 // Standard functions.
 
+fn test_any_and_all_for_bool() -> bool {
+    let a = any(true);
+    return all(a);
+}
+
+
 @fragment
 fn derivatives(@builtin(position) foo: vec4<f32>) -> @location(0) vec4<f32> {
     var x = dpdxCoarse(foo);
@@ -14,5 +20,7 @@ fn derivatives(@builtin(position) foo: vec4<f32>) -> @location(0) vec4<f32> {
     y = dpdy(foo);
     z = fwidth(foo);
 
+    let a = test_any_and_all_for_bool();
+
     return (x + y) * z;
 }

tests/out/glsl/standard.derivatives.Fragment.glsl

@@ -5,6 +5,10 @@ precision highp int;
 
 layout(location = 0) out vec4 _fs2p_location0;
 
+bool test_any_and_all_for_bool() {
+    return true;
+}
+
 void main() {
     vec4 foo = gl_FragCoord;
     vec4 x = vec4(0.0);
@@ -28,10 +32,11 @@ void main() {
     y = _e11;
     vec4 _e12 = fwidth(foo);
     z = _e12;
-    vec4 _e13 = x;
-    vec4 _e14 = y;
-    vec4 _e16 = z;
-    _fs2p_location0 = ((_e13 + _e14) * _e16);
+    bool _e13 = test_any_and_all_for_bool();
+    vec4 _e14 = x;
+    vec4 _e15 = y;
+    vec4 _e17 = z;
+    _fs2p_location0 = ((_e14 + _e15) * _e17);
     return;
 }
 

tests/out/hlsl/standard.hlsl

@@ -2,6 +2,11 @@ struct FragmentInput_derivatives {
     float4 foo_1 : SV_Position;
 };
 
+bool test_any_and_all_for_bool()
+{
+    return true;
+}
+
 float4 derivatives(FragmentInput_derivatives fragmentinput_derivatives) : SV_Target0
 {
     float4 foo = fragmentinput_derivatives.foo_1;
@@ -27,8 +32,9 @@ float4 derivatives(FragmentInput_derivatives fragmentinput_derivatives) : SV_Tar
     y = _expr11;
     float4 _expr12 = fwidth(foo);
     z = _expr12;
-    float4 _expr13 = x;
-    float4 _expr14 = y;
-    float4 _expr16 = z;
-    return ((_expr13 + _expr14) * _expr16);
+    const bool _e13 = test_any_and_all_for_bool();
+    float4 _expr14 = x;
+    float4 _expr15 = y;
+    float4 _expr17 = z;
+    return ((_expr14 + _expr15) * _expr17);
 }

tests/out/msl/standard.msl

@@ -5,6 +5,11 @@
 using metal::uint;
 
 
+bool test_any_and_all_for_bool(
+) {
+    return true;
+}
+
 struct derivativesInput {
 };
 struct derivativesOutput {
@@ -34,8 +39,9 @@ fragment derivativesOutput derivatives(
     y = _e11;
     metal::float4 _e12 = metal::fwidth(foo);
     z = _e12;
-    metal::float4 _e13 = x;
-    metal::float4 _e14 = y;
-    metal::float4 _e16 = z;
-    return derivativesOutput { (_e13 + _e14) * _e16 };
+    bool _e13 = test_any_and_all_for_bool();
+    metal::float4 _e14 = x;
+    metal::float4 _e15 = y;
+    metal::float4 _e17 = z;
+    return derivativesOutput { (_e14 + _e15) * _e17 };
 }

tests/out/spv/standard.spvasm

@@ -1,56 +1,66 @@
 ; SPIR-V
 ; Version: 1.1
 ; Generator: rspirv
-; Bound: 33
+; Bound: 40
 OpCapability Shader
 OpCapability DerivativeControl
 %1 = OpExtInstImport "GLSL.std.450"
 OpMemoryModel Logical GLSL450
-OpEntryPoint Fragment %16 "derivatives" %11 %14
-OpExecutionMode %16 OriginUpperLeft
-OpDecorate %11 BuiltIn FragCoord
-OpDecorate %14 Location 0
+OpEntryPoint Fragment %22 "derivatives" %17 %20
+OpExecutionMode %22 OriginUpperLeft
+OpDecorate %17 BuiltIn FragCoord
+OpDecorate %20 Location 0
 %2 = OpTypeVoid
-%4 = OpTypeFloat 32
-%3 = OpTypeVector %4 4
-%6 = OpTypePointer Function %3
-%7 = OpConstantNull  %3
-%12 = OpTypePointer Input %3
-%11 = OpVariable  %12  Input
-%15 = OpTypePointer Output %3
-%14 = OpVariable  %15  Output
-%17 = OpTypeFunction %2
-%16 = OpFunction  %2  None %17
+%3 = OpTypeBool
+%5 = OpTypeFloat 32
+%4 = OpTypeVector %5 4
+%8 = OpTypeFunction %3
+%9 = OpConstantTrue  %3
+%12 = OpTypePointer Function %4
+%13 = OpConstantNull  %4
+%18 = OpTypePointer Input %4
+%17 = OpVariable  %18  Input
+%21 = OpTypePointer Output %4
+%20 = OpVariable  %21  Output
+%23 = OpTypeFunction %2
+%7 = OpFunction  %3  None %8
+%6 = OpLabel
+OpBranch %10
 %10 = OpLabel
-%5 = OpVariable  %6  Function %7
-%8 = OpVariable  %6  Function %7
-%9 = OpVariable  %6  Function %7
-%13 = OpLoad  %3  %11
-OpBranch %18
-%18 = OpLabel
-%19 = OpDPdxCoarse  %3  %13
-OpStore %5 %19
-%20 = OpDPdyCoarse  %3  %13
-OpStore %8 %20
-%21 = OpFwidthCoarse  %3  %13
-OpStore %9 %21
-%22 = OpDPdxFine  %3  %13
-OpStore %5 %22
-%23 = OpDPdyFine  %3  %13
-OpStore %8 %23
-%24 = OpFwidthFine  %3  %13
-OpStore %9 %24
-%25 = OpDPdx  %3  %13
-OpStore %5 %25
-%26 = OpDPdy  %3  %13
-OpStore %8 %26
-%27 = OpFwidth  %3  %13
-OpStore %9 %27
-%28 = OpLoad  %3  %5
-%29 = OpLoad  %3  %8
-%30 = OpFAdd  %3  %28 %29
-%31 = OpLoad  %3  %9
-%32 = OpFMul  %3  %30 %31
+OpReturnValue %9
+OpFunctionEnd
+%22 = OpFunction  %2  None %23
+%16 = OpLabel
+%11 = OpVariable  %12  Function %13
+%14 = OpVariable  %12  Function %13
+%15 = OpVariable  %12  Function %13
+%19 = OpLoad  %4  %17
+OpBranch %24
+%24 = OpLabel
+%25 = OpDPdxCoarse  %4  %19
+OpStore %11 %25
+%26 = OpDPdyCoarse  %4  %19
+OpStore %14 %26
+%27 = OpFwidthCoarse  %4  %19
+OpStore %15 %27
+%28 = OpDPdxFine  %4  %19
+OpStore %11 %28
+%29 = OpDPdyFine  %4  %19
+OpStore %14 %29
+%30 = OpFwidthFine  %4  %19
+OpStore %15 %30
+%31 = OpDPdx  %4  %19
+OpStore %11 %31
+%32 = OpDPdy  %4  %19
 OpStore %14 %32
+%33 = OpFwidth  %4  %19
+OpStore %15 %33
+%34 = OpFunctionCall  %3  %7
+%35 = OpLoad  %4  %11
+%36 = OpLoad  %4  %14
+%37 = OpFAdd  %4  %35 %36
+%38 = OpLoad  %4  %15
+%39 = OpFMul  %4  %37 %38
+OpStore %20 %39
 OpReturn
 OpFunctionEnd

tests/out/wgsl/standard.wgsl

@@ -1,3 +1,7 @@
+fn test_any_and_all_for_bool() -> bool {
+    return true;
+}
+
 @fragment 
 fn derivatives(@builtin(position) foo: vec4<f32>) -> @location(0) vec4<f32> {
     var x: vec4<f32>;
@@ -22,8 +26,9 @@ fn derivatives(@builtin(position) foo: vec4<f32>) -> @location(0) vec4<f32> {
     y = _e11;
     let _e12 = fwidth(foo);
     z = _e12;
-    let _e13 = x;
-    let _e14 = y;
-    let _e16 = z;
-    return ((_e13 + _e14) * _e16);
+    let _e13 = test_any_and_all_for_bool();
+    let _e14 = x;
+    let _e15 = y;
+    let _e17 = z;
+    return ((_e14 + _e15) * _e17);
 }