13 lines
231 B
LLVM
13 lines
231 B
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
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@var = external global i64 ; <i64*> [#uses=1]
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define i32 @main() nounwind {
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entry:
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; CHECK: main:
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; CHECK: lock
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; CHECK: decq
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atomicrmw sub i64* @var, i64 1 monotonic
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unreachable
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}
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