[all-commits] [llvm/llvm-project] 868d43: [InstCombine] add helper for x/pow(); NFC

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  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 868d43fbd6571d11f91564969676bb0f1b19b455
      https://github.com/llvm/llvm-project/commit/868d43fbd6571d11f91564969676bb0f1b19b455
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-02-24 (Wed, 24 Feb 2021)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp

  Log Message:
  -----------
  [InstCombine] add helper for x/pow(); NFC

We at least want to add powi to this list, so
split it off into a switch to reduce code duplication.


  Commit: a7cee55762c6564de9dfc90985fe5c14cad7f9ee
      https://github.com/llvm/llvm-project/commit/a7cee55762c6564de9dfc90985fe5c14cad7f9ee
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-02-24 (Wed, 24 Feb 2021)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
    M llvm/test/Transforms/InstCombine/fdiv.ll

  Log Message:
  -----------
  [InstCombine] fold fdiv with powi divisor (PR49147)

This extends b40fde062c for the especially non-standard
powi pattern. We want to avoid being completely wrong
on the negation-of-int-min corner case, so I'm adding
an extra FMF check for 'ninf' assuming that gives us
the flexibility to handle that possibility.
https://llvm.org/PR49147


Compare: https://github.com/llvm/llvm-project/compare/80f329bcd028...a7cee55762c6