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Wow. I definitely shouldn't write code when I'm tird.

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Make my previous patch actually do what it was intended to do.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44061 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-11-13 19:56:28 +00:00
parent b1d40d9dd7
commit 660c5b9514
1 changed files with 24 additions and 19 deletions
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43
include/llvm/CodeGen/BreakCriticalMachineEdge.h
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@ -52,27 +52,16 @@ MachineBasicBlock* SplitCriticalMachineEdge(MachineBasicBlock* src,
break;
}
// Scan the operands of this branch, finding all uses of this MBB
std::vector<unsigned> toRemove;
unsigned reg = 0;
// Scan the operands of this branch, replacing any uses of dst with
// crit_mbb.
for (unsigned i = 0, e = mii->getNumOperands(); i != e; ++i) {
MachineOperand & mo = mii->getOperand(i);
if (mo.isMachineBasicBlock() &&
mo.getMachineBasicBlock() == dst)
reg = mii->getOperand(i-1).getReg();
toRemove.push_back(i-1);
mo.getMachineBasicBlock() == dst) {
found_branch = true;
mo.setMachineBasicBlock(crit_mbb);
}
}
// Remove all uses of this MBB
for (std::vector<unsigned>::reverse_iterator I = toRemove.rbegin(),
E = toRemove.rend(); I != E; ++I) {
mii->RemoveOperand(*I+1);
mii->RemoveOperand(*I);
}
// Add a single use corresponding to the new MBB
mii->addRegOperand(reg, false);
mii->addMachineBasicBlockOperand(crit_mbb);
}
// TODO: This is tentative. It may be necessary to fix this code. Maybe
@ -89,10 +78,26 @@ MachineBasicBlock* SplitCriticalMachineEdge(MachineBasicBlock* src,
if(mii->getOpcode() != TargetInstrInfo::PHI)
break;
// Find the operands corresponding to the source block
std::vector<unsigned> toRemove;
unsigned reg = 0;
for (unsigned u = 0; u != mii->getNumOperands(); ++u)
if (mii->getOperand(u).isMachineBasicBlock() &&
mii->getOperand(u).getMachineBasicBlock() == src)
mii->getOperand(u).setMachineBasicBlock(crit_mbb);
mii->getOperand(u).getMachineBasicBlock() == src) {
reg = mii->getOperand(u-1).getReg();
toRemove.push_back(u-1);
}
// Remove all uses of this MBB
for (std::vector<unsigned>::reverse_iterator I = toRemove.rbegin(),
E = toRemove.rend(); I != E; ++I) {
mii->RemoveOperand(*I+1);
mii->RemoveOperand(*I);
}
// Add a single use corresponding to the new MBB
mii->addRegOperand(reg, false);
mii->addMachineBasicBlockOperand(crit_mbb);
}
return crit_mbb;