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| author | Tim Northover <tnorthover@apple.com> | 2014-05-30 14:41:51 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2014-05-30 14:41:51 +0000 |
| commit | 3a45d4c62136a0eb7c433a0e6435e8734aa28333 (patch) | |
| tree | be5c0e759792d6d860e6d76b2721bd47d0d8812b /lib/CodeGen/SelectionDAG | |
| parent | 645c5b94e270db6648919efc140152bbac85bcd9 (diff) | |
| download | llvm-3a45d4c62136a0eb7c433a0e6435e8734aa28333.tar.gz llvm-3a45d4c62136a0eb7c433a0e6435e8734aa28333.tar.bz2 llvm-3a45d4c62136a0eb7c433a0e6435e8734aa28333.tar.xz | |
SelectionDAG: skip barriers for unordered atomic operations
Unordered is strictly weaker than monotonic, so if the latter doesn't have any
barriers then the former certainly shouldn't.
rdar://problem/16548260
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209901 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 070e929fce..8d10a80b4d 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -3570,12 +3570,12 @@ static SDValue InsertFenceForAtomic(SDValue Chain, AtomicOrdering Order, if (Before) { if (Order == AcquireRelease || Order == SequentiallyConsistent) Order = Release; - else if (Order == Acquire || Order == Monotonic) + else if (Order == Acquire || Order == Monotonic || Order == Unordered) return Chain; } else { if (Order == AcquireRelease) Order = Acquire; - else if (Order == Release || Order == Monotonic) + else if (Order == Release || Order == Monotonic || Order == Unordered) return Chain; } SDValue Ops[3]; |