Nikita Popov 878cb38a5c [InstCombine] Add replaceOperand() helper ...

Adds a replaceOperand() helper, which is like Instruction.setOperand()
but adds the old operand to the worklist. This reduces the amount of
missing or incorrect worklist management.

This only applies the helper to a relatively small subset of
setOperand() calls in InstCombine, namely those of the pattern
`I.setOperand(); return &I;`, where it is most obviously applicable.

Differential Revision: https://reviews.llvm.org/D73803

2020-02-03 19:00:17 +01:00

89 KiB

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