[all-commits] [llvm/llvm-project] be2afb: [AMDGPU] Remove fix up operand from SI_ELSE

[Carl Ritson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: be2afbd019de37f1da1af9d6224972deac6f3792
      https://github.com/llvm/llvm-project/commit/be2afbd019de37f1da1af9d6224972deac6f3792
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2020-10-20 (Tue, 20 Oct 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstructions.td
    M llvm/lib/Target/AMDGPU/SILowerControlFlow.cpp
    M llvm/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp
    M llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-brcond.mir
    M llvm/test/CodeGen/AMDGPU/collapse-endcf.mir
    M llvm/test/CodeGen/AMDGPU/control-flow-fastregalloc.ll
    M llvm/test/CodeGen/AMDGPU/lower-control-flow-other-terminators.mir

  Log Message:
  -----------
  [AMDGPU] Remove fix up operand from SI_ELSE

Remove immediate operand from SI_ELSE which indicates if EXEC has
been modified.  Instead always emit code that handles EXEC and
remove unnecessary instructions during pre-RA optimisation.

This facilitates passes (i.e. SIWholeQuadMode) adding exec mask
manipulation post control flow lowering, and pre control flow
lower passes do not need to be aware of SI_ELSE handling.

Reviewed By: nhaehnle

Differential Revision: https://reviews.llvm.org/D89644