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| author | Jim Grosbach <grosbach@apple.com> | 2010-06-23 16:08:49 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-06-23 16:08:49 +0000 |
| commit | 5def57aaf477e3383cbd1b925233098a54273146 (patch) | |
| tree | e26f194b20abd16fd81425e32fd70ae65d0c31f1 | |
| parent | 9a526495e0c06c4014d7500788cad1929fd244d3 (diff) | |
When using libcall expansions for the atomic intrinsics, the explicit
MEMBARRIER fences aren't necessary for ARM. Tell the combiner to fold them
away.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106631 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 7f89b2d168..97a5f9da12 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -441,6 +441,8 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM) setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i8, Expand); setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i16, Expand); setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand); + // Since the libcalls include locking, fold in the fences + setShouldFoldAtomicFences(true); } // 64-bit versions are always libcalls (for now) setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Expand); |