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ca396e391e
The syntax for "cmpxchg" should now look something like: cmpxchg i32* %addr, i32 42, i32 3 acquire monotonic where the second ordering argument gives the required semantics in the case that no exchange takes place. It should be no stronger than the first ordering constraint and cannot be either "release" or "acq_rel" (since no store will have taken place). rdar://problem/15996804 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203559 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
735 B
LLVM
23 lines
735 B
LLVM
; RUN: llvm-dis < %s.bc | FileCheck %s
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; cmpxchg-upgrade.ll.bc was produced by running a version of llvm-as from just
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; before the IR change on this file.
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define void @test(i32* %addr) {
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cmpxchg i32* %addr, i32 42, i32 0 monotonic
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; CHECK: cmpxchg i32* %addr, i32 42, i32 0 monotonic monotonic
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cmpxchg i32* %addr, i32 42, i32 0 acquire
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; CHECK: cmpxchg i32* %addr, i32 42, i32 0 acquire acquire
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cmpxchg i32* %addr, i32 42, i32 0 release
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; CHECK: cmpxchg i32* %addr, i32 42, i32 0 release monotonic
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cmpxchg i32* %addr, i32 42, i32 0 acq_rel
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; CHECK: cmpxchg i32* %addr, i32 42, i32 0 acq_rel acquire
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cmpxchg i32* %addr, i32 42, i32 0 seq_cst
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; CHECK: cmpxchg i32* %addr, i32 42, i32 0 seq_cst seq_cst
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ret void
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} |