[all-commits] [llvm/llvm-project] edd0df: AMDGPU/GlobalISel: Refine G_TRUNC legality rules

[Matt Arsenault via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: edd0dfca0dbdcdaa7cdc3861ccecda6cc5bb9b3a
      https://github.com/llvm/llvm-project/commit/edd0dfca0dbdcdaa7cdc3861ccecda6cc5bb9b3a
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2020-03-10 (Tue, 10 Mar 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-unmerge-values.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fcopysign.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-trunc.mir

  Log Message:
  -----------
  AMDGPU/GlobalISel: Refine G_TRUNC legality rules

Scalarize most truncates. Avoid touching cases that could end up in
unresolvable infinite loops.