[HLSL] Make bool in hlsl i32 (#122977)

make a bool's memory representation i32 in hlsl
add new test
fix broken test
Closes #122932

Author: spall

clang/lib/Basic/TargetInfo.cpp

@@ -425,6 +425,7 @@ void TargetInfo::adjust(DiagnosticsEngine &Diags, LangOptions &Opts) {
   // HLSL explicitly defines the sizes and formats of some data types, and we
   // need to conform to those regardless of what architecture you are targeting.
   if (Opts.HLSL) {
+    BoolWidth = BoolAlign = 32;
     LongWidth = LongAlign = 64;
     if (!Opts.NativeHalfType) {
       HalfFormat = &llvm::APFloat::IEEEsingle();

clang/test/CodeGenHLSL/Bool.hlsl

@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.3-library -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
+
+// CHECK-LABEL: define noundef i1 {{.*}}fn{{.*}}(i1 noundef %x)
+// CHECK: [[X:%.*]] = alloca i32, align 4
+// CHECK-NEXT: [[Y:%.*]] = zext i1 {{%.*}} to i32
+// CHECK-NEXT: store i32 [[Y]], ptr [[X]], align 4
+// CHECK-NEXT: [[Z:%.*]] = load i32, ptr [[X]], align 4
+// CHECK-NEXT: [[L:%.*]] = trunc i32 [[Z]] to i1
+// CHECK-NEXT: ret i1 [[L]]
+bool fn(bool x) {
+  return x;
+}

clang/test/SemaHLSL/BuiltIns/asfloat-errors.hlsl

@@ -24,12 +24,3 @@ float test_float_half(half p1) {
     // expected-note@hlsl/hlsl_detail.h:* {{candidate template ignored: could not match 'vector<half, N>' against 'half'}}
     // expected-note@hlsl/hlsl_detail.h:* {{candidate template ignored: substitution failure [with U = float, T = half]: no type named 'Type'}}
 }
-
-
-float test_float_half(bool p1) {
-    return asfloat(p1);
-    // expected-error@hlsl/hlsl_intrinsics.h:* {{no matching function for call to 'bit_cast'}}
-    // expected-note@-2 {{in instantiation of function template specialization 'hlsl::asfloat<bool>'}}
-    // expected-note@hlsl/hlsl_detail.h:* {{candidate template ignored: could not match 'vector<bool, N>' against 'bool'}}
-    // expected-note@hlsl/hlsl_detail.h:* {{candidate template ignored: substitution failure [with U = float, T = bool]: no type named 'Type'}}
-}