================
@@ -1665,6 +1665,22 @@ void
TwoAddressInstructionImpl::processTiedPairs(MachineInstr *MI,
// by SubRegB is compatible with RegA with no subregister. So regardless of
// whether the dest oper writes a subreg, the source oper should not.
MO.setSubReg(0);
+
+ // Update uses of RegB to uses of RegA inside the bundle.
+ if (MI->isBundle()) {
+ for (MachineInstr *InnerMI = MI; InnerMI->isBundledWithSucc();) {
+ InnerMI = InnerMI->getNextNode();
+
+ for (MachineOperand &MO : InnerMI->all_uses()) {
+ if (MO.isReg() && MO.getReg() == RegB) {
+ assert(
+ MO.getSubReg() == 0 &&
+ "tied subregister uses in bundled instructions not supported");
+ MO.setReg(RegA);
----------------
jayfoad wrote:
Then maybe assert that `MO.getSubReg() == 0 && SubRegB == 0`? Otherwise this
code will replace a use of one reg with a use of another reg with a different
size.
https://github.com/llvm/llvm-project/pull/166212
_______________________________________________
llvm-branch-commits mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
