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| author | Jonathan Roelofs <jonathan@codesourcery.com> | 2014-08-21 14:35:47 +0000 |
|---|---|---|
| committer | Jonathan Roelofs <jonathan@codesourcery.com> | 2014-08-21 14:35:47 +0000 |
| commit | 5e98ff967b23e84edf96513ac6e12213104b3148 (patch) | |
| tree | ade5afb7b80ab45a8cded9c4f08e27ae1a87865f /llvm/lib/Target/ARM/ARMTargetMachine.cpp | |
| parent | a96344b50d09e299184772ccd06f9b30c0022f65 (diff) | |
| download | bcm5719-llvm-5e98ff967b23e84edf96513ac6e12213104b3148.tar.gz bcm5719-llvm-5e98ff967b23e84edf96513ac6e12213104b3148.zip | |
Add a thread-model knob for lowering atomics on baremetal & single threaded systems
http://reviews.llvm.org/D4984
llvm-svn: 216182
Diffstat (limited to 'llvm/lib/Target/ARM/ARMTargetMachine.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMTargetMachine.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/ARMTargetMachine.cpp b/llvm/lib/Target/ARM/ARMTargetMachine.cpp index d85194b75ec..fc164ada35f 100644 --- a/llvm/lib/Target/ARM/ARMTargetMachine.cpp +++ b/llvm/lib/Target/ARM/ARMTargetMachine.cpp @@ -158,7 +158,10 @@ TargetPassConfig *ARMBaseTargetMachine::createPassConfig(PassManagerBase &PM) { } void ARMPassConfig::addIRPasses() { - addPass(createAtomicExpandLoadLinkedPass(TM)); + if (TM->Options.ThreadModel == ThreadModel::Single) + addPass(createLowerAtomicPass()); + else + addPass(createAtomicExpandLoadLinkedPass(TM)); // Cmpxchg instructions are often used with a subsequent comparison to // determine whether it succeeded. We can exploit existing control-flow in |
