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[clang] Fixed a crash when explicitly casting to atomic complex #172163

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[clang] Fixed a crash when explicitly casting to atomic complex #172163

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1 change: 1 addition & 0 deletions clang/docs/ReleaseNotes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -800,6 +800,7 @@ Crash and bug fixes
containing a single colon. (#GH167905)
- Fixed a crash when parsing malformed #pragma clang loop vectorize_width(4,8,16)
by diagnosing invalid comma-separated argument lists. (#GH166325)
- Fixed a crash when explicitly casting a scalar to an atomic complex. (#GH114885)

Improvements
^^^^^^^^^^^^
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2 changes: 2 additions & 0 deletions clang/lib/CodeGen/CGExprComplex.cpp
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Expand Up @@ -533,6 +533,8 @@ ComplexPairTy ComplexExprEmitter::EmitScalarToComplexCast(llvm::Value *Val,
QualType DestType,
SourceLocation Loc) {
// Convert the input element to the element type of the complex.
if (DestType->isAtomicType())
DestType = DestType->castAs<AtomicType>()->getValueType();
DestType = DestType->castAs<ComplexType>()->getElementType();
Val = CGF.EmitScalarConversion(Val, SrcType, DestType, Loc);

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15 changes: 15 additions & 0 deletions clang/test/CodeGen/complex.c
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Expand Up @@ -593,3 +593,18 @@ void imag_on_scalar_with_type_promotion() {
_Float16 _Complex a;
_Float16 b = __real__(__imag__ a);
}

// CHECK-LABEL: define dso_local void @explicit_cast_scalar_to_atomic_complex(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[A:%.*]] = alloca { float, float }, align 8
// CHECK-NEXT: [[A_REALP:%.*]] = getelementptr inbounds nuw { float, float }, ptr [[A]], i32 0, i32 0
// CHECK-NEXT: [[A_IMAGP:%.*]] = getelementptr inbounds nuw { float, float }, ptr [[A]], i32 0, i32 1
// CHECK-NEXT: store float 2.000000e+00, ptr [[A_REALP]], align 8
// CHECK-NEXT: store float 0.000000e+00, ptr [[A_IMAGP]], align 4
// CHECK-NEXT: ret void
//
void explicit_cast_scalar_to_atomic_complex() {
_Atomic _Complex float a = (_Atomic _Complex float)2.0f;
}