[llvm-branch-commits] [llvm] CodeGen: More accurate mayAlias for instructions with multiple MMOs (PR #166211)

[Jay Foad via llvm-branch-commits]

https://github.com/jayfoad commented:

This patch highlights a problem that I have run into before: _if_ we want to support a single opcode (in this case BUNDLE) that may or may not load or store depending on its operands, then the current definitions of `MachineInstr::mayLoad` and `mayStore` are not good enough, because they just check a static property of the opcode.

If `mayLoad` and `mayStore` were more sophisticated then this check would have been handled already at L1527.

Having said that, in the short term I have no objection to this patch.

https://github.com/llvm/llvm-project/pull/166211