48 lines
1.0 KiB
LLVM
48 lines
1.0 KiB
LLVM
; RUN: opt -instcombine -S %s | FileCheck %s
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; Make sure we collapse the fences in this case
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; CHECK-LABEL: define void @tinkywinky
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; CHECK-NEXT: fence seq_cst
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; CHECK-NEXT: fence syncscope("singlethread") acquire
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @tinkywinky() {
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fence seq_cst
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fence seq_cst
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fence seq_cst
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fence syncscope("singlethread") acquire
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fence syncscope("singlethread") acquire
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fence syncscope("singlethread") acquire
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ret void
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}
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; CHECK-LABEL: define void @dipsy
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; CHECK-NEXT: fence seq_cst
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; CHECK-NEXT: fence syncscope("singlethread") seq_cst
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @dipsy() {
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fence seq_cst
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fence syncscope("singlethread") seq_cst
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ret void
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}
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; CHECK-LABEL: define void @patatino
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; CHECK-NEXT: fence acquire
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; CHECK-NEXT: fence seq_cst
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; CHECK-NEXT: fence acquire
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; CHECK-NEXT: fence seq_cst
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @patatino() {
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fence acquire
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fence seq_cst
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fence acquire
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fence seq_cst
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ret void
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}
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