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| author | Tim Northover <tnorthover@apple.com> | 2014-03-11 10:48:52 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2014-03-11 10:48:52 +0000 |
| commit | ca396e391e13d417605ebed06780d92c88f14a6b (patch) | |
| tree | a984bbd50ef52c0ad3f0fd66b81d1021b072d16c /test/Assembler | |
| parent | fb411c8b8ce42689d42b0d8e3a871d81f86a7298 (diff) | |
| download | llvm-ca396e391e13d417605ebed06780d92c88f14a6b.tar.gz llvm-ca396e391e13d417605ebed06780d92c88f14a6b.tar.bz2 llvm-ca396e391e13d417605ebed06780d92c88f14a6b.tar.xz | |
IR: add a second ordering operand to cmpxhg for failure
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
Diffstat (limited to 'test/Assembler')
| -rw-r--r-- | test/Assembler/atomic.ll | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/test/Assembler/atomic.ll b/test/Assembler/atomic.ll index b245cdea75..a2ae58e296 100644 --- a/test/Assembler/atomic.ll +++ b/test/Assembler/atomic.ll @@ -10,10 +10,12 @@ define void @f(i32* %x) { store atomic i32 3, i32* %x release, align 4 ; CHECK: store atomic volatile i32 3, i32* %x singlethread monotonic, align 4 store atomic volatile i32 3, i32* %x singlethread monotonic, align 4 - ; CHECK: cmpxchg i32* %x, i32 1, i32 0 singlethread monotonic - cmpxchg i32* %x, i32 1, i32 0 singlethread monotonic - ; CHECK: cmpxchg volatile i32* %x, i32 0, i32 1 acq_rel - cmpxchg volatile i32* %x, i32 0, i32 1 acq_rel + ; CHECK: cmpxchg i32* %x, i32 1, i32 0 singlethread monotonic monotonic + cmpxchg i32* %x, i32 1, i32 0 singlethread monotonic monotonic + ; CHECK: cmpxchg volatile i32* %x, i32 0, i32 1 acq_rel acquire + cmpxchg volatile i32* %x, i32 0, i32 1 acq_rel acquire + ; CHECK: cmpxchg i32* %x, i32 42, i32 0 acq_rel monotonic + cmpxchg i32* %x, i32 42, i32 0 acq_rel monotonic ; CHECK: atomicrmw add i32* %x, i32 10 seq_cst atomicrmw add i32* %x, i32 10 seq_cst ; CHECK: atomicrmw volatile xchg i32* %x, i32 10 monotonic |