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Thumb1 and any pre-v6 ARM target should use the libcall expansion of 

ISD::MEMBARRIER. v7 and v7 ARM mode continue to use the custom lowering.

llvm-svn: 106204
This commit is contained in:
Jim Grosbach 2010-06-17 02:02:03 +00:00
parent ba451e80dc
commit 5712c77c89
1 changed files with 6 additions and 1 deletions
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7
llvm/lib/Target/ARM/ARMISelLowering.cpp
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@ -405,7 +405,12 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
// doesn't yet know how to not do that for SjLj. // doesn't yet know how to not do that for SjLj.
setExceptionSelectorRegister(ARM::R0); setExceptionSelectorRegister(ARM::R0);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand); setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom); // Handle atomics directly for ARMv[67] (except for Thumb1), otherwise
// use the default expansion.
TargetLowering::LegalizeAction AtomicAction =
(Subtarget->hasV7Ops() ||
(Subtarget->hasV6Ops() && !Subtarget->isThumb1Only())) ? Custom : Expand;
setOperationAction(ISD::MEMBARRIER, MVT::Other, AtomicAction);
// If the subtarget does not have extract instructions, sign_extend_inreg // If the subtarget does not have extract instructions, sign_extend_inreg
// needs to be expanded. Extract is available in ARM mode on v6 and up, // needs to be expanded. Extract is available in ARM mode on v6 and up,