From 7072cf62a52787c461e3371ad36e1754e8a0dc97 Mon Sep 17 00:00:00 2001 From: Jim Grosbach Date: Thu, 17 Jun 2010 02:02:03 +0000 Subject: [PATCH] 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106204 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/ARM/ARMISelLowering.cpp | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index d684c057b29..2d963fa9703 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -405,7 +405,12 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM) // doesn't yet know how to not do that for SjLj. setExceptionSelectorRegister(ARM::R0); 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 // needs to be expanded. Extract is available in ARM mode on v6 and up,