Summary:
The code in LiveRangeEdit::eliminateDeadDef() that computes isOrigDef
doesn't handle instructions in which operand 0 is not a def (e.g. KILL)
correctly. Add a check that operand 0 is a def before doing the rest of
the isOrigDef computation.
Reviewers: qcolombet, MatzeB, wmi
Subscribers: mcrosier, llvm-commits
Differential Revision: https://reviews.llvm.org/D27174
llvm-svn: 288189
bool ReadsPhysRegs = false;
bool isOrigDef = false;
unsigned Dest;
- if (VRM && MI->getOperand(0).isReg()) {
+ if (VRM && MI->getOperand(0).isReg() && MI->getOperand(0).isDef()) {
+ assert(MI->getDesc().getNumDefs() == 1);
Dest = MI->getOperand(0).getReg();
unsigned Original = VRM->getOriginal(Dest);
LiveInterval &OrigLI = LIS.getInterval(Original);