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RegAllocBigBlock doesn't need LiveVariables either.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46488 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-01-29 02:32:13 +00:00
parent 6be48d49cf
commit 8822eabe36
1 changed files with 2 additions and 13 deletions
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15
lib/CodeGen/RegAllocBigBlock.cpp
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@ -97,10 +97,6 @@ namespace {
/// 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 @@ namespace {
/// 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 @@ MachineInstr *RABigBlock::reloadVirtReg(MachineBasicBlock &MBB, MachineInstr *MI
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 @@ void RABigBlock::AllocateBasicBlock(MachineBasicBlock &MBB) {
// 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 @@ bool RABigBlock::runOnMachineFunction(MachineFunction &Fn) {
MF = &Fn;
TM = &Fn.getTarget();
RegInfo = TM->getRegisterInfo();
LV = &getAnalysis<LiveVariables>();
PhysRegsUsed.assign(RegInfo->getNumRegs(), -1);