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[KeyInstr][Clang] Coerce through memory atom

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This commit is contained in:
Orlando Cazalet-Hyams 2025-04-07 11:57:46 +01:00
parent 51bedf4b28
commit e5779b993f
2 changed files with 31 additions and 4 deletions
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9
clang/lib/CodeGen/CGCall.cpp
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@ -1435,10 +1435,11 @@ void CodeGenFunction::CreateCoercedStore(llvm::Value *Src, Address Dst,
RawAddress Tmp =
CreateTempAllocaForCoercion(*this, SrcTy, Dst.getAlignment());
Builder.CreateStore(Src, Tmp);
Builder.CreateMemCpy(Dst.emitRawPointer(*this),
Dst.getAlignment().getAsAlign(), Tmp.getPointer(),
Tmp.getAlignment().getAsAlign(),
Builder.CreateTypeSize(IntPtrTy, DstSize));
auto *I = Builder.CreateMemCpy(
Dst.emitRawPointer(*this), Dst.getAlignment().getAsAlign(),
Tmp.getPointer(), Tmp.getAlignment().getAsAlign(),
Builder.CreateTypeSize(IntPtrTy, DstSize));
addInstToCurrentSourceAtom(I, Src);
}
}

26
clang/test/KeyInstructions/coerced-through-memory.c Normal file
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@ -0,0 +1,26 @@
// RUN: %clang -gkey-instructions -gno-column-info -x c++ %s -gmlt -S -emit-llvm -o - -target aarch64-windows-msvc \
// RUN: | FileCheck %s --implicit-check-not atomGroup --implicit-check-not atomRank
// RUN: %clang -gkey-instructions -gno-column-info -x c %s -gmlt -S -emit-llvm -o - -target aarch64-windows-msvc \
// RUN: | FileCheck %s --implicit-check-not atomGroup --implicit-check-not atomRank
typedef struct {
short a;
int b;
short c;
} S;
S getS(void);
void f() {
// CHECK: %call = call [2 x i64] {{.*}}getS{{.*}}(), !dbg [[G1R2:!.*]]
//// Note: The store to the tmp alloca isn't part of the atom.
// CHECK: store [2 x i64] %call, ptr %tmp.coerce, align 8
// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %s, ptr align 8 %tmp.coerce, i64 12, i1 false), !dbg [[G1R1:!.*]]
S s = getS();
// CHECK: ret void, !dbg [[G2R1:!.*]]
}
// CHECK: [[G1R2]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 2)
// CHECK: [[G1R1]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 1)
// CHECK: [[G2R1]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 1)