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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 | a8ea498171c4360ec88f0721408b0f197e60d5c2 (patch) | |
| tree | b76f189dccfbbbf80e797c5da6e98b0aabcd97dd /llvm/lib/Target/ARM/ARMISelLowering.cpp | |
| parent | b58c08b0ba5d0163111d4b7454a3d968d86c3ece (diff) | |
| download | bcm5719-llvm-a8ea498171c4360ec88f0721408b0f197e60d5c2.tar.gz bcm5719-llvm-a8ea498171c4360ec88f0721408b0f197e60d5c2.zip | |
When using libcall expansions for the atomic intrinsics, the explicit
MEMBARRIER fences aren't necessary for ARM. Tell the combiner to fold them
away.
llvm-svn: 106631
Diffstat (limited to 'llvm/lib/Target/ARM/ARMISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMISelLowering.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp index 7f89b2d1685..97a5f9da120 100644 --- a/llvm/lib/Target/ARM/ARMISelLowering.cpp +++ b/llvm/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); |
