<rdar://problem/
8959122> illegal register operands for UMULL instruction in cfrac nightly test
I'm stil working on a unit test, but the case is:
rx = movcc rx, r3
r2 = ldr
r2, r3 = umull r2, r2
The anti-dep breaker should not convert this into an illegal instruction:
r2, r2 = umull
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124932
91177308-0d34-0410-b5e6-
96231b3b80d8
{
for (RegRefIter I = RegRefBegin; I != RegRefEnd; ++I ) {
MachineOperand *MO = I->second;
- if (MO->isDef()) continue;
if (MO->getParent()->modifiesRegister(NewReg, TRI))
return true;
}