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Add a big assert making sure 2 address instructions are formed right

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llvm-svn: 5057
This commit is contained in:
Chris Lattner 2002-12-15 21:02:20 +00:00
parent c3be436a6a
commit da3e75b117
1 changed files with 6 additions and 0 deletions
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6
lib/CodeGen/RegAllocSimple.cpp
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@ -379,6 +379,12 @@ void RegAllocSimple::AllocateBasicBlock(MachineBasicBlock &MBB) {
if (TM.getInstrInfo().isTwoAddrInstr(MI->getOpcode()) && i == 0) {
// must be same register number as the first operand
// This maps a = b + c into b += c, and saves b into a's spot
assert(MI->getOperand(1).isRegister() &&
MI->getOperand(1).getAllocatedRegNum() &&
MF->getRegClass(virtualReg) ==
PhysRegClasses[MI->getOperand(1).getAllocatedRegNum()] &&
"Two address instruction invalid!");
physReg = MI->getOperand(1).getAllocatedRegNum();
} else {
physReg = getFreeReg(virtualReg);