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

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Target/TargetSubtargetInfo.cpp b/llvm/lib/Target/TargetSubtargetInfo.cpp
index 0c388f8fb26..ce00fcc6273 100644
--- a/llvm/lib/Target/TargetSubtargetInfo.cpp
+++ b/llvm/lib/Target/TargetSubtargetInfo.cpp
@@ -39,6 +39,10 @@ bool TargetSubtargetInfo::useMachineScheduler() const {
   return enableMachineScheduler();
 }
 
+bool TargetSubtargetInfo::enableAtomicExpandLoadLinked() const {
+  return true;
+}
+
 bool TargetSubtargetInfo::enableMachineScheduler() const {
   return false;
 }