diff options
| author | Jim Grosbach <grosbach@apple.com> | 2010-06-23 16:07:42 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-06-23 16:07:42 +0000 |
| commit | b58c08b0ba5d0163111d4b7454a3d968d86c3ece (patch) | |
| tree | 0986225298bfcd1e9be2bc5c2ac237eb5d1e0e6b /llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | |
| parent | 1fc3bdc61e55c30f790ff2b79ec4ef941645c75b (diff) | |
| download | bcm5719-llvm-b58c08b0ba5d0163111d4b7454a3d968d86c3ece.tar.gz bcm5719-llvm-b58c08b0ba5d0163111d4b7454a3d968d86c3ece.zip | |
Some targets don't require the fencing MEMBARRIER instructions surrounding
atomic intrinsics, either because the use locking instructions for the
atomics, or because they perform the locking directly. Add support in the
DAG combiner to fold away the fences.
llvm-svn: 106630
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 945cbbb6cce..bfd689b4d1e 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -581,6 +581,7 @@ TargetLowering::TargetLowering(const TargetMachine &tm, IfCvtBlockSizeLimit = 2; IfCvtDupBlockSizeLimit = 0; PrefLoopAlignment = 0; + ShouldFoldAtomicFences = false; InitLibcallNames(LibcallRoutineNames); InitCmpLibcallCCs(CmpLibcallCCs); |
