derek.holloway
7502bf64a4
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36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o - | FileCheck %s --check-prefix=CIR
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o - | FileCheck %s --check-prefix=LLVM
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=OGCG
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// Empty union (no padding, size 0 in CIR)
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union Empty {};
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// CIR: !rec_Empty = !cir.union<"Empty" {}>
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// LLVM: %union.Empty = type {}
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// OGCG: %union.Empty = type {}
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// Aligned empty union (size 0, alignment 16)
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union EmptyAligned {} __attribute__((aligned(16)));
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// CIR: !rec_EmptyAligned = !cir.union<"EmptyAligned" {}>
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// LLVM: %union.EmptyAligned = type {}
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// OGCG: %union.EmptyAligned = type {}
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void useEmpty() {
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union Empty e;
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}
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// CIR: cir.func {{.*}}@useEmpty()
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// CIR: cir.alloca !rec_Empty, !cir.ptr<!rec_Empty>, ["e"] {alignment = 1 : i64}
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// LLVM: define {{.*}} void @useEmpty()
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// LLVM: alloca %union.Empty, i64 1, align 1
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// OGCG: define {{.*}} void @useEmpty()
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// OGCG: alloca %union.Empty, align 1
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void useEmptyAligned() {
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union EmptyAligned e;
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}
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// CIR: cir.func {{.*}}@useEmptyAligned()
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// CIR: cir.alloca !rec_EmptyAligned, !cir.ptr<!rec_EmptyAligned>, ["e"] {alignment = 16 : i64}
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// LLVM: define {{.*}} void @useEmptyAligned()
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// LLVM: alloca %union.EmptyAligned, i64 1, align 16
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// OGCG: define {{.*}} void @useEmptyAligned()
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// OGCG: alloca %union.EmptyAligned, align 16
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