[all-commits] [llvm/llvm-project] d30cf7: [InstCombine] complete fold extractvalue (any_mul_...

[ZCBing via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d30cf77cb1e4f743c52adbd52bf4f079794eded3
      https://github.com/llvm/llvm-project/commit/d30cf77cb1e4f743c52adbd52bf4f079794eded3
  Author: Chenbing Zheng <Chenbing.Zheng at streamcomputing.com>
  Date:   2022-09-02 (Fri, 02 Sep 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/with_overflow.ll

  Log Message:
  -----------
  [InstCombine] complete fold extractvalue (any_mul_with_overflow X, -1)

When we do extractvalue (any_mul_with_overflow X, -1) --> (-X and icmp),
which left partly failed to match vector constant with poison element.
This patch try to fix it.

Alive2: https://alive2.llvm.org/ce/z/2rGp_3

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D132996