[all-commits] [llvm/llvm-project] 2128fc: [InstCombine] Canonicalize `gep T* X, V / sizeof(T...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2128fca6c1e3a0ba4d105f62ad0f6a841e992cfb
      https://github.com/llvm/llvm-project/commit/2128fca6c1e3a0ba4d105f62ad0f6a841e992cfb
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2023-12-29 (Fri, 29 Dec 2023)

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

  Log Message:
  -----------
  [InstCombine] Canonicalize `gep T* X, V / sizeof(T)` to `gep i8* X, V` (#76458)

This patch canonicalize `gep T* X, V / sizeof(T)` to `gep i8* X, V`.
Alive2: https://alive2.llvm.org/ce/z/7XGjiB

As this pattern has been handled by the backends, the motivation of this
patch is to reduce the ref count of sdiv, which will enable more
optimizations.