Add a new subtarget hook for whether or not we'd like to enable
the atomic load linked expander pass to run for a particular
subtarget. This requires a check of the subtarget and so save
the TargetMachine rather than only TargetLoweringInfo and update
all callers.
llvm-svn: 211314
diff --git a/llvm/lib/Target/ARM/ARMTargetMachine.cpp b/llvm/lib/Target/ARM/ARMTargetMachine.cpp
index 7a3836a..434d3b0 100644
--- a/llvm/lib/Target/ARM/ARMTargetMachine.cpp
+++ b/llvm/lib/Target/ARM/ARMTargetMachine.cpp
@@ -171,16 +171,15 @@
}
void ARMPassConfig::addIRPasses() {
- const ARMSubtarget *Subtarget = &getARMSubtarget();
- if (Subtarget->hasAnyDataBarrier() && !Subtarget->isThumb1Only()) {
- addPass(createAtomicExpandLoadLinkedPass(TM));
+ addPass(createAtomicExpandLoadLinkedPass(TM));
- // Cmpxchg instructions are often used with a subsequent comparison to
- // determine whether it succeeded. We can exploit existing control-flow in
- // ldrex/strex loops to simplify this, but it needs tidying up.
+ // Cmpxchg instructions are often used with a subsequent comparison to
+ // determine whether it succeeded. We can exploit existing control-flow in
+ // ldrex/strex loops to simplify this, but it needs tidying up.
+ const ARMSubtarget *Subtarget = &getARMSubtarget();
+ if (Subtarget->hasAnyDataBarrier() && !Subtarget->isThumb1Only())
if (TM->getOptLevel() != CodeGenOpt::None && EnableAtomicTidy)
addPass(createCFGSimplificationPass());
- }
TargetPassConfig::addIRPasses();
}