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Reduce vector reallocations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127254 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-03-08 17:28:36 +00:00
parent db04b81014
commit f337fb2fa8
1 changed files with 2 additions and 4 deletions
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6
lib/CodeGen/LiveVariables.cpp
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@@ -107,9 +107,7 @@ void LiveVariables::MarkVirtRegAliveInBlock(VarInfo& VRInfo,
// Mark the variable known alive in this bb // Mark the variable known alive in this bb
VRInfo.AliveBlocks.set(BBNum); VRInfo.AliveBlocks.set(BBNum);
for (MachineBasicBlock::const_pred_reverse_iterator PI = MBB->pred_rbegin(), WorkList.insert(WorkList.end(), MBB->pred_rbegin(), MBB->pred_rend());
E = MBB->pred_rend(); PI != E; ++PI)
WorkList.push_back(*PI);
} }
void LiveVariables::MarkVirtRegAliveInBlock(VarInfo &VRInfo, void LiveVariables::MarkVirtRegAliveInBlock(VarInfo &VRInfo,
@@ -707,7 +705,7 @@ bool LiveVariables::isLiveOut(unsigned Reg, const MachineBasicBlock &MBB) {
// Loop over all of the successors of the basic block, checking to see if // Loop over all of the successors of the basic block, checking to see if
// the value is either live in the block, or if it is killed in the block. // the value is either live in the block, or if it is killed in the block.
std::vector<MachineBasicBlock*> OpSuccBlocks; SmallVector<MachineBasicBlock*, 8> OpSuccBlocks;
for (MachineBasicBlock::const_succ_iterator SI = MBB.succ_begin(), for (MachineBasicBlock::const_succ_iterator SI = MBB.succ_begin(),
E = MBB.succ_end(); SI != E; ++SI) { E = MBB.succ_end(); SI != E; ++SI) {
MachineBasicBlock *SuccMBB = *SI; MachineBasicBlock *SuccMBB = *SI;