X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FOptimizePHIs.cpp;h=d28292d9fe51c5271660726ca728165e0c1f0fdd;hb=ab08da75d70c76fd946483e29366264c92cc092b;hp=748a59c3c963b9c8d685c220bb8b33bf97cf1c51;hpb=9f998de8918c1dd5a8b8ec564af00107859898e0;p=oota-llvm.git

diff --git a/lib/CodeGen/OptimizePHIs.cpp b/lib/CodeGen/OptimizePHIs.cpp
index 748a59c3c96..d28292d9fe5 100644
--- a/lib/CodeGen/OptimizePHIs.cpp
+++ b/lib/CodeGen/OptimizePHIs.cpp
@@ -12,7 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "phi-opt"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/Statistic.h"
@@ -21,8 +20,11 @@
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/IR/Function.h"
 #include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
 using namespace llvm;
 
+#define DEBUG_TYPE "phi-opt"
+
 STATISTIC(NumPHICycles, "Number of PHI cycles replaced");
 STATISTIC(NumDeadPHICycles, "Number of dead PHI cycles");
 
@@ -61,8 +63,11 @@ INITIALIZE_PASS(OptimizePHIs, "opt-phis",
                 "Optimize machine instruction PHIs", false, false)
 
 bool OptimizePHIs::runOnMachineFunction(MachineFunction &Fn) {
+  if (skipOptnoneFunction(*Fn.getFunction()))
+    return false;
+
   MRI = &Fn.getRegInfo();
-  TII = Fn.getTarget().getInstrInfo();
+  TII = Fn.getSubtarget().getInstrInfo();
 
   // Find dead PHI cycles and PHI cycles that can be replaced by a single
   // value.  InstCombine does these optimizations, but DAG legalization may
@@ -139,10 +144,8 @@ bool OptimizePHIs::IsDeadPHICycle(MachineInstr *MI, InstrSet &PHIsInCycle) {
   if (PHIsInCycle.size() == 16)
     return false;
 
-  for (MachineRegisterInfo::use_iterator I = MRI->use_begin(DstReg),
-         E = MRI->use_end(); I != E; ++I) {
-    MachineInstr *UseMI = &*I;
-    if (!UseMI->isPHI() || !IsDeadPHICycle(UseMI, PHIsInCycle))
+  for (MachineInstr &UseMI : MRI->use_instructions(DstReg)) {
+    if (!UseMI.isPHI() || !IsDeadPHICycle(&UseMI, PHIsInCycle))
       return false;
   }