Enable thumb1 register scavenging by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83496 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 10 deletions

diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp
index 55298a4dde..896689cc1e 100644
--- a/lib/CodeGen/PrologEpilogInserter.cpp
+++ b/lib/CodeGen/PrologEpilogInserter.cpp
@@ -44,16 +44,6 @@ char PEI::ID = 0;
 static RegisterPass<PEI>
 X("prologepilog", "Prologue/Epilogue Insertion");
 
-// FIXME: For now, the frame index scavenging is off by default and only
-// used by the Thumb1 target. When it's the default and replaces the current
-// on-the-fly PEI scavenging for all targets, requiresRegisterScavenging()
-// will replace this.
-cl::opt<bool>
-FrameIndexVirtualScavenging("enable-frame-index-scavenging",
-                            cl::Hidden,
-                            cl::desc("Enable frame index elimination with"
-                                     "virtual register scavenging"));
-
 /// createPrologEpilogCodeInserter - This function returns a pass that inserts
 /// prolog and epilog code, and eliminates abstract frame references.
 ///
@@ -66,6 +56,7 @@ bool PEI::runOnMachineFunction(MachineFunction &Fn) {
   const Function* F = Fn.getFunction();
   const TargetRegisterInfo *TRI = Fn.getTarget().getRegisterInfo();
   RS = TRI->requiresRegisterScavenging(Fn) ? new RegScavenger() : NULL;
+  FrameIndexVirtualScavenging = TRI->requiresFrameIndexScavenging(Fn);
 
   // Get MachineModuleInfo so that we can track the construction of the
   // frame.