[flang-commits] [flang] [mlir] [mlir][Transforms] `GreedyPatternRewriteDriver`: Do not CSE constants during iterations (PR #75897)

[Jacques Pienaar via flang-commits]

https://github.com/jpienaar commented:

This makes sense to me. Previously the constant folding optimization limited the patterns that can be used. This change gives most of the same folding optimization while avoiding that. (we may need to hoist out some helpers there eventually). I'll wait for someone else to chime in too given change centrality, but this looks close to least disruptive change that avoids the issue.

https://github.com/llvm/llvm-project/pull/75897