Enable virtual register based frame index scavenging by default for ARM & T2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85335 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
index 11cd1ef..169e178 100644
--- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
@@ -42,11 +42,11 @@
 
 static cl::opt<bool>
 ScavengeFrameIndexVals("arm-virtual-frame-index-vals", cl::Hidden,
-          cl::init(false),
+          cl::init(true),
           cl::desc("Resolve frame index values via scavenging in PEI"));
 
 static cl::opt<bool>
-ReuseFrameIndexVals("arm-reuse-frame-index-vals", cl::Hidden, cl::init(false),
+ReuseFrameIndexVals("arm-reuse-frame-index-vals", cl::Hidden, cl::init(true),
           cl::desc("Reuse repeated frame index values"));
 
 static cl::opt<bool>