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Reapply r107655 with fixes; insert the pseudo instruction into

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the block before calling the expansion hook. And don't
put EFLAGS in a mbb's live-in list twice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107691 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-07-06 20:24:04 +00:00
parent 004c82ad7c
commit 14152b480d
15 changed files with 280 additions and 212 deletions
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30
lib/CodeGen/MachineBasicBlock.cpp
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@ -335,12 +335,32 @@ void MachineBasicBlock::transferSuccessors(MachineBasicBlock *fromMBB) {
if (this == fromMBB)
return;
for (MachineBasicBlock::succ_iterator I = fromMBB->succ_begin(),
E = fromMBB->succ_end(); I != E; ++I)
addSuccessor(*I);
while (!fromMBB->succ_empty()) {
MachineBasicBlock *Succ = *fromMBB->succ_begin();
addSuccessor(Succ);
fromMBB->removeSuccessor(Succ);
}
}
void
MachineBasicBlock::transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB) {
if (this == fromMBB)
return;
while (!fromMBB->succ_empty())
fromMBB->removeSuccessor(fromMBB->succ_begin());
while (!fromMBB->succ_empty()) {
MachineBasicBlock *Succ = *fromMBB->succ_begin();
addSuccessor(Succ);
fromMBB->removeSuccessor(Succ);
// Fix up any PHI nodes in the successor.
for (MachineBasicBlock::iterator MI = Succ->begin(), ME = Succ->end();
MI != ME && MI->isPHI(); ++MI)
for (unsigned i = 2, e = MI->getNumOperands()+1; i != e; i += 2) {
MachineOperand &MO = MI->getOperand(i);
if (MO.getMBB() == fromMBB)
MO.setMBB(this);
}
}
}
bool MachineBasicBlock::isSuccessor(const MachineBasicBlock *MBB) const {