Move enabling the local stack allocation pass into the target where it belongs.

For now it's still a command line option, but the interface to the generic
code doesn't need to know that.

llvm-svn: 111942

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/LocalStackSlotAllocation.cpp b/llvm/lib/CodeGen/LocalStackSlotAllocation.cpp
index 811cb07628d..3f79593b4ed 100644
--- a/llvm/lib/CodeGen/LocalStackSlotAllocation.cpp
+++ b/llvm/lib/CodeGen/LocalStackSlotAllocation.cpp
@@ -74,10 +74,12 @@ FunctionPass *llvm::createLocalStackSlotAllocationPass() {
 
 bool LocalStackSlotPass::runOnMachineFunction(MachineFunction &MF) {
   MachineFrameInfo *MFI = MF.getFrameInfo();
+  const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
   unsigned LocalObjectCount = MFI->getObjectIndexEnd();
 
-  // Early exit if there are no locals to consider
-  if (!LocalObjectCount)
+  // If the target doesn't want/need this pass, or if there are no locals
+  // to consider, early exit.
+  if (!TRI->requiresVirtualBaseRegisters(MF) || LocalObjectCount == 0)
     return true;
 
   // Make sure we have enough space to store the local offsets.