sema: fix int enum implicit cast to float.

An implicit cast from int enum to a float should be a Floating_Integral cast, not an Integral_Conversion. Fixes microsoft#6884 Signed-off-by: Nathan Gauër <[email protected]>
Keenuts · Nov 12, 2024 · 5230473 · 5230473
1 parent ac36a79
commit 5230473
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Showing 3 changed files with 25 additions and 2 deletions.
diff --git a/tools/clang/lib/Sema/SemaHLSL.cpp b/tools/clang/lib/Sema/SemaHLSL.cpp
@@ -9102,7 +9102,10 @@ static bool ConvertComponent(ArTypeInfo TargetInfo, ArTypeInfo SourceInfo,
       return false;
     } else if (IS_BASIC_ENUM(SourceInfo.EltKind)) {
       // enum -> int/float
-      ComponentConversion = ICK_Integral_Conversion;
+      if (IS_BASIC_FLOAT(TargetInfo.EltKind))
+        ComponentConversion = ICK_Floating_Integral;
+      else
+        ComponentConversion = ICK_Integral_Conversion;
     } else if (TargetInfo.EltKind == AR_OBJECT_STRING) {
       if (SourceInfo.EltKind == AR_OBJECT_STRING_LITERAL) {
         ComponentConversion = ICK_Array_To_Pointer;

diff --git a/tools/clang/test/CodeGenSPIRV/type.enum.cast.hlsl b/tools/clang/test/CodeGenSPIRV/type.enum.cast.hlsl
@@ -0,0 +1,20 @@
+// RUN: %dxc -T cs_6_6 -fspv-target-env=vulkan1.3 -E main %s -spirv -fcgl | FileCheck %s
+
+enum : uint {
+  UA = 1
+};
+
+enum : int {
+  SA = 3
+};
+
+static float p;
+
+[numthreads(1, 1, 1)]
+void main() {
+//CHECK:         OpStore %foo %float_1
+  float foo = UA;
+
+//CHECK:         OpStore %bar %float_3
+  float bar = SA;
+}
diff --git a/tools/clang/test/CodeGenSPIRV/type.enum.hlsl b/tools/clang/test/CodeGenSPIRV/type.enum.hlsl
@@ -101,7 +101,7 @@ void main() {
   testParamTypeCast(Second);
 
 //CHECK:        [[a_2:%[0-9]+]] = OpLoad %int %a
-//CHECK-NEXT:   [[a_3:%[0-9]+]] = OpBitcast %float [[a_2]]
+//CHECK-NEXT:   [[a_3:%[0-9]+]] = OpConvertSToF %float [[a_2]]
 //CHECK-NEXT: [[sin:%[0-9]+]] = OpExtInst %float {{%[0-9]+}} Sin [[a_3]]
 //CHECK-NEXT:                OpStore %bar [[sin]]
   float bar = sin(a);