[all-commits] [llvm/llvm-project] a51226: Revert "[DAGCombiner] Enable SimplifyDemandedBits ...

[Hans via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a51226057fc30510ac86b32a36a9769ddbf4c318
      https://github.com/llvm/llvm-project/commit/a51226057fc30510ac86b32a36a9769ddbf4c318
  Author: Hans Wennborg <hans at chromium.org>
  Date:   2021-01-20 (Wed, 20 Jan 2021)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/aarch64-smull.ll
    M llvm/test/CodeGen/AArch64/lowerMUL-newload.ll
    M llvm/test/CodeGen/AMDGPU/widen-smrd-loads.ll
    M llvm/test/CodeGen/ARM/lowerMUL-newload.ll
    M llvm/test/CodeGen/Thumb2/mve-satmul-loops.ll
    M llvm/test/CodeGen/Thumb2/mve-vmulh.ll
    M llvm/test/CodeGen/X86/combine-sra.ll
    M llvm/test/CodeGen/X86/known-signbits-vector.ll
    M llvm/test/CodeGen/X86/min-legal-vector-width.ll
    M llvm/test/CodeGen/X86/vector-trunc.ll

  Log Message:
  -----------
  Revert "[DAGCombiner] Enable SimplifyDemandedBits vector support for TRUNCATE"

It caused "Vector shift amounts must be in the same as their first arg"
asserts in Chromium builds. See the code review for repro instructions.

> Add DemandedElts support inside the TRUNCATE analysis.
>
> Differential Revision: https://reviews.llvm.org/D56387

This reverts commit cad4275d697c601761e0819863f487def73c67f8.