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author | Tim Northover <tnorthover@apple.com> | 2014-03-11 10:48:52 +0000 |
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committer | Tim Northover <tnorthover@apple.com> | 2014-03-11 10:48:52 +0000 |
commit | ca396e391e13d417605ebed06780d92c88f14a6b (patch) | |
tree | a984bbd50ef52c0ad3f0fd66b81d1021b072d16c /test/Instrumentation/MemorySanitizer | |
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/Instrumentation/MemorySanitizer')
-rw-r--r-- | test/Instrumentation/MemorySanitizer/atomics.ll | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/test/Instrumentation/MemorySanitizer/atomics.ll b/test/Instrumentation/MemorySanitizer/atomics.ll index ff0245262c..98697d7038 100644 --- a/test/Instrumentation/MemorySanitizer/atomics.ll +++ b/test/Instrumentation/MemorySanitizer/atomics.ll @@ -37,7 +37,7 @@ entry: define i32 @Cmpxchg(i32* %p, i32 %a, i32 %b) sanitize_memory { entry: - %0 = cmpxchg i32* %p, i32 %a, i32 %b seq_cst + %0 = cmpxchg i32* %p, i32 %a, i32 %b seq_cst seq_cst ret i32 %0 } @@ -46,16 +46,16 @@ entry: ; CHECK: icmp ; CHECK: br ; CHECK: @__msan_warning -; CHECK: cmpxchg {{.*}} seq_cst +; CHECK: cmpxchg {{.*}} seq_cst seq_cst ; CHECK: store i32 0, {{.*}} @__msan_retval_tls ; CHECK: ret i32 -; relaxed cmpxchg: bump up to "release" +; relaxed cmpxchg: bump up to "release monotonic" define i32 @CmpxchgMonotonic(i32* %p, i32 %a, i32 %b) sanitize_memory { entry: - %0 = cmpxchg i32* %p, i32 %a, i32 %b monotonic + %0 = cmpxchg i32* %p, i32 %a, i32 %b monotonic monotonic ret i32 %0 } @@ -64,7 +64,7 @@ entry: ; CHECK: icmp ; CHECK: br ; CHECK: @__msan_warning -; CHECK: cmpxchg {{.*}} release +; CHECK: cmpxchg {{.*}} release monotonic ; CHECK: store i32 0, {{.*}} @__msan_retval_tls ; CHECK: ret i32 |