[all-commits] [llvm/llvm-project] a4ced0: [AMDGPU] SIFoldOperands: eagerly delete dead copies

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4ced03d3425f8808b09e3586659fdb5b9c4605d
      https://github.com/llvm/llvm-project/commit/a4ced03d3425f8808b09e3586659fdb5b9c4605d
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2021-04-09 (Fri, 09 Apr 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/cvt_f32_ubyte.ll
    M llvm/test/CodeGen/AMDGPU/flat-scratch-fold-fi.mir
    M llvm/test/CodeGen/AMDGPU/fold-cndmask-wave32.mir
    M llvm/test/CodeGen/AMDGPU/fold-cndmask.mir
    M llvm/test/CodeGen/AMDGPU/fold-imm-f16-f32.mir
    M llvm/test/CodeGen/AMDGPU/fold-operands-order.mir
    M llvm/test/CodeGen/AMDGPU/fold-readlane.mir
    M llvm/test/CodeGen/AMDGPU/huge-number-operand-folds.mir
    M llvm/test/CodeGen/AMDGPU/promote-constOffset-to-imm.ll
    M llvm/test/CodeGen/AMDGPU/udiv64.ll
    M llvm/test/CodeGen/AMDGPU/urem64.ll

  Log Message:
  -----------
  [AMDGPU] SIFoldOperands: eagerly delete dead copies

This is cheap to implement, means less work for future passes like
MachineDCE, and slightly improves the folding in some cases.

Differential Revision: https://reviews.llvm.org/D100117