[llvm-commits] [llvm] r84664 - /llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp

[Jim Grosbach]

Author: grosbach
Date: Tue Oct 20 15:19:50 2009
New Revision: 84664

URL: http://llvm.org/viewvc/llvm-project?rev=84664&view=rev
Log:
add cmd line opt to disable frame index reuse for ARM and T2. debug aid.

Modified:
    llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp?rev=84664&r1=84663&r2=84664&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp Tue Oct 20 15:19:50 2009
@@ -36,8 +36,13 @@
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/CommandLine.h"
 using namespace llvm;
 
+static cl::opt<bool>
+ReuseFrameIndexVals("arm-reuse-frame-index-vals", cl::Hidden, cl::init(true),
+          cl::desc("Reuse repeated frame index values"));
+
 unsigned ARMBaseRegisterInfo::getRegisterNumbering(unsigned RegEnum,
                                                    bool *isSPVFP) {
   if (isSPVFP)
@@ -1088,6 +1093,8 @@
                              Offset, Pred, PredReg, TII);
     }
     MI.getOperand(i).ChangeToRegister(ScratchReg, false, false, true);
+    if (!ReuseFrameIndexVals)
+      ScratchReg = 0;
   }
   return ScratchReg;
 }