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Eliminate some deep std::vector copies. NFC.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218999 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2014-10-03 18:33:16 +00:00
parent 3c5eaffc07
commit 63688e622c
14 changed files with 25 additions and 50 deletions
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lib/CodeGen/MachineLICM.cpp
+3 -17
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@@ -143,9 +143,6 @@ namespace {
RegPressure.clear();
RegLimit.clear();
BackTrace.clear();
for (DenseMap<unsigned,std::vector<const MachineInstr*> >::iterator
CI = CSEMap.begin(), CE = CSEMap.end(); CI != CE; ++CI)
CI->second.clear();
CSEMap.clear();
}
@@ -1300,15 +1297,7 @@ void MachineLICM::InitCSEMap(MachineBasicBlock *BB) {
for (MachineBasicBlock::iterator I = BB->begin(),E = BB->end(); I != E; ++I) {
const MachineInstr *MI = &*I;
unsigned Opcode = MI->getOpcode();
DenseMap<unsigned, std::vector<const MachineInstr*> >::iterator
CI = CSEMap.find(Opcode);
if (CI != CSEMap.end())
CI->second.push_back(MI);
else {
std::vector<const MachineInstr*> CSEMIs;
CSEMIs.push_back(MI);
CSEMap.insert(std::make_pair(Opcode, CSEMIs));
}
CSEMap[Opcode].push_back(MI);
}
}
@@ -1448,11 +1437,8 @@ bool MachineLICM::Hoist(MachineInstr *MI, MachineBasicBlock *Preheader) {
// Add to the CSE map.
if (CI != CSEMap.end())
CI->second.push_back(MI);
else {
std::vector<const MachineInstr*> CSEMIs;
CSEMIs.push_back(MI);
CSEMap.insert(std::make_pair(Opcode, CSEMIs));
}
else
CSEMap[Opcode].push_back(MI);
}
++NumHoisted;