[llvm-commits] [llvm] r76865 - /llvm/trunk/lib/CodeGen/PHIElimination.cpp
Lang Hames
lhames at gmail.com
Wed Jul 22 22:44:33 PDT 2009
Author: lhames
Date: Thu Jul 23 00:44:24 2009
New Revision: 76865
URL: http://llvm.org/viewvc/llvm-project?rev=76865&view=rev
Log:
For real this time: PHI Def & Kill tracking added to PHIElimination.
Modified:
llvm/trunk/lib/CodeGen/PHIElimination.cpp
Modified: llvm/trunk/lib/CodeGen/PHIElimination.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PHIElimination.cpp?rev=76865&r1=76864&r2=76865&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PHIElimination.cpp (original)
+++ llvm/trunk/lib/CodeGen/PHIElimination.cpp Thu Jul 23 00:44:24 2009
@@ -50,6 +50,8 @@
bool llvm::PHIElimination::runOnMachineFunction(MachineFunction &Fn) {
MRI = &Fn.getRegInfo();
+ PHIDefs.clear();
+ PHIKills.clear();
analyzePHINodes(Fn);
bool Changed = false;
@@ -183,8 +185,8 @@
}
// Record PHI def.
- //assert(!hasPHIDef(DestReg) && "Vreg has multiple phi-defs?");
- //PHIDefs[DestReg] = &MBB;
+ assert(!hasPHIDef(DestReg) && "Vreg has multiple phi-defs?");
+ PHIDefs[DestReg] = &MBB;
// Update live variable information if there is any.
LiveVariables *LV = getAnalysisIfAvailable<LiveVariables>();
@@ -232,7 +234,7 @@
MachineBasicBlock &opBlock = *MPhi->getOperand(i*2+2).getMBB();
// Record the kill.
- //PHIKills[SrcReg].insert(&opBlock);
+ PHIKills[SrcReg].insert(&opBlock);
// If source is defined by an implicit def, there is no need to insert a
// copy.
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