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Add an assert

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12010 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-29 22:01:51 +00:00
parent c81295ab24
commit 92bc3bc11c
1 changed files with 4 additions and 1 deletions
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5
lib/CodeGen/LiveVariables.cpp
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@ -277,7 +277,9 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
// PHI nodes are guaranteed to be at the top of the block... // PHI nodes are guaranteed to be at the top of the block...
for (MachineBasicBlock::iterator MI = Succ->begin(), ME = Succ->end(); for (MachineBasicBlock::iterator MI = Succ->begin(), ME = Succ->end();
MI != ME && MI->getOpcode() == TargetInstrInfo::PHI; ++MI) { MI != ME && MI->getOpcode() == TargetInstrInfo::PHI; ++MI) {
for (unsigned i = 1; ; i += 2) for (unsigned i = 1; ; i += 2) {
assert(MI->getNumOperands() > i+1 &&
"Didn't find an entry for our predecessor??");
if (MI->getOperand(i+1).getMachineBasicBlock() == MBB) { if (MI->getOperand(i+1).getMachineBasicBlock() == MBB) {
MachineOperand &MO = MI->getOperand(i); MachineOperand &MO = MI->getOperand(i);
if (!MO.getVRegValueOrNull()) { if (!MO.getVRegValueOrNull()) {
@ -290,6 +292,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
} }
} }
} }
}
// Loop over PhysRegInfo, killing any registers that are available at the // Loop over PhysRegInfo, killing any registers that are available at the
// end of the basic block. This also resets the PhysRegInfo map. // end of the basic block. This also resets the PhysRegInfo map.