commit 36b56886974eae4f9c5ebc96befd3e7bfe5de338
author Stephen Hines <srhines@google.com> Wed Apr 23 16:57:46 2014 -0700
committer Stephen Hines <srhines@google.com> Thu Apr 24 15:53:16 2014 -0700
tree e6cfb69fbbd937f450eeb83bfb83b9da3b01275a
parent 69a8640022b04415ae9fac62f8ab090601d8f889

Update to LLVM 3.5a.

Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617

lib/CodeGen/OptimizePHIs.cpp

diff --git a/lib/CodeGen/OptimizePHIs.cpp b/lib/CodeGen/OptimizePHIs.cpp
index 3982612..56cb673 100644
--- a/lib/CodeGen/OptimizePHIs.cpp
+++ b/lib/CodeGen/OptimizePHIs.cpp
@@ -37,9 +37,9 @@
       initializeOptimizePHIsPass(*PassRegistry::getPassRegistry());
     }
 
-    virtual bool runOnMachineFunction(MachineFunction &MF);
+    bool runOnMachineFunction(MachineFunction &MF) override;
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesCFG();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
@@ -61,6 +61,9 @@
                 "Optimize machine instruction PHIs", false, false)
 
 bool OptimizePHIs::runOnMachineFunction(MachineFunction &Fn) {
+  if (skipOptnoneFunction(*Fn.getFunction()))
+    return false;
+
   MRI = &Fn.getRegInfo();
   TII = Fn.getTarget().getInstrInfo();
 
@@ -139,10 +142,8 @@
   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;
   }