RegAllocBigBlock doesn't need LiveVariables either.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46488 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocBigBlock.cpp b/lib/CodeGen/RegAllocBigBlock.cpp
index 64ae9f9..592650f 100644
--- a/lib/CodeGen/RegAllocBigBlock.cpp
+++ b/lib/CodeGen/RegAllocBigBlock.cpp
@@ -97,10 +97,6 @@
/// etc)
const MRegisterInfo *RegInfo;
- /// LV - Our generic LiveVariables pointer
- ///
- LiveVariables *LV;
-
typedef SmallVector<unsigned, 2> VRegTimes;
/// VRegReadTable - maps VRegs in a BB to the set of times they are read
@@ -182,7 +178,6 @@
/// getAnalaysisUsage - declares the required analyses
///
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.addRequired<LiveVariables>();
AU.addRequiredID(PHIEliminationID);
AU.addRequiredID(TwoAddressInstructionPassID);
MachineFunctionPass::getAnalysisUsage(AU);
@@ -528,9 +523,7 @@
Ops.push_back(OpNum);
if(MachineInstr* FMI = TII->foldMemoryOperand(MI, Ops, FrameIndex)) {
++NumFolded;
- // Since we changed the address of MI, make sure to update live variables
- // to know that the new instruction has the properties of the old one.
- LV->instructionChanged(MI, FMI);
+ FMI->copyKillDeadInfo(MI);
return MBB.insert(MBB.erase(MI), FMI);
}
@@ -832,11 +825,8 @@
// Finally, if this is a noop copy instruction, zap it.
unsigned SrcReg, DstReg;
- if (TII.isMoveInstr(*MI, SrcReg, DstReg) && SrcReg == DstReg) {
- LV->removeVirtualRegistersKilled(MI);
- LV->removeVirtualRegistersDead(MI);
+ if (TII.isMoveInstr(*MI, SrcReg, DstReg) && SrcReg == DstReg)
MBB.erase(MI);
- }
}
MachineBasicBlock::iterator MI = MBB.getFirstTerminator();
@@ -857,7 +847,6 @@
MF = &Fn;
TM = &Fn.getTarget();
RegInfo = TM->getRegisterInfo();
- LV = &getAnalysis<LiveVariables>();
PhysRegsUsed.assign(RegInfo->getNumRegs(), -1);