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Fix a memory bug: increment an iterator of a deleted machine instr.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48853 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-03-27 01:27:25 +00:00
parent 7c1483bc6f
commit 7a963fa8ee
2 changed files with 31 additions and 2 deletions
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9
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -200,7 +200,8 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
for (MachineFunction::iterator mbbi = MF.begin(), mbbe = MF.end();
mbbi != mbbe; ++mbbi) {
for (MachineBasicBlock::iterator mi = mbbi->begin(), me = mbbi->end();
mi != me; ++mi) {
mi != me; ) {
MachineBasicBlock::iterator nmi = next(mi);
const TargetInstrDesc &TID = mi->getDesc();
bool FirstTied = true;
@ -298,7 +299,10 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
// then one instruction.
Sunk = Sink3AddrInstruction(mbbi, New, regB, mi);
mbbi->erase(mi); // Nuke the old inst.
if (!Sunk) mi = New;
if (!Sunk) {
mi = New;
nmi = next(mi);
}
++NumConvertedTo3Addr;
// Done with this instruction.
break;
@ -337,6 +341,7 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
DOUT << "\t\trewrite to:\t"; DEBUG(mi->print(*cerr.stream(), &TM));
}
mi = nmi;
}
}