void SIWholeQuadMode::propagateInstruction(const MachineInstr &MI,
std::vector<WorkItem>& Worklist) {
const MachineBasicBlock &MBB = *MI.getParent();
- InstrInfo &II = Instructions[&MI];
+ InstrInfo II = Instructions[&MI]; // take a copy to prevent dangling references
BlockInfo &BI = Blocks[&MBB];
// Control flow-type instructions that are followed by WQM computations
// must themselves be in WQM.
if ((II.OutNeeds & StateWQM) && !(II.Needs & StateWQM) &&
- (MI.isBranch() || MI.isTerminator() || MI.getOpcode() == AMDGPU::SI_KILL))
+ (MI.isBranch() || MI.isTerminator() || MI.getOpcode() == AMDGPU::SI_KILL)) {
+ Instructions[&MI].Needs = StateWQM;
II.Needs = StateWQM;
+ }
// Propagate to block level
BI.Needs |= II.Needs;
void SIWholeQuadMode::propagateBlock(const MachineBasicBlock &MBB,
std::vector<WorkItem>& Worklist) {
- BlockInfo &BI = Blocks[&MBB];
+ BlockInfo BI = Blocks[&MBB]; // take a copy to prevent dangling references
// Propagate through instructions
if (!MBB.empty()) {