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Identity copies should not contribute to spill weight.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84978 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-10-23 23:09:19 +00:00
parent 7388037dd1
commit c9dfeb1be8
2 changed files with 28 additions and 4 deletions
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7
lib/CodeGen/SimpleRegisterCoalescing.cpp
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@ -2556,6 +2556,7 @@ static bool isZeroLengthInterval(LiveInterval *li, LiveIntervals *li_) {
return true;
}
void SimpleRegisterCoalescing::CalculateSpillWeights() {
SmallSet<unsigned, 4> Processed;
for (MachineFunction::iterator mbbi = mf_->begin(), mbbe = mf_->end();
@ -2566,9 +2567,11 @@ void SimpleRegisterCoalescing::CalculateSpillWeights() {
unsigned loopDepth = loop ? loop->getLoopDepth() : 0;
bool isExit = loop ? loop->isLoopExit(MBB) : false;
for (MachineBasicBlock::iterator mii = MBB->begin(), mie = MBB->end();
for (MachineBasicBlock::const_iterator mii = MBB->begin(), mie = MBB->end();
mii != mie; ++mii) {
MachineInstr *MI = mii;
const MachineInstr *MI = mii;
if (tii_->isIdentityCopy(*MI))
continue;
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &mopi = MI->getOperand(i);