[all-commits] [llvm/llvm-project] 381ded: [AMDGPU] Add S_MOV_B64_IMM_PSEUDO for wide constants

[Stanislav Mekhanoshin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 381ded345bdd59edcea9a87f399f67b18be7622a
      https://github.com/llvm/llvm-project/commit/381ded345bdd59edcea9a87f399f67b18be7622a
  Author: Stanislav Mekhanoshin <Stanislav.Mekhanoshin at amd.com>
  Date:   2021-06-30 (Wed, 30 Jun 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPU.h
    M llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
    M llvm/lib/Target/AMDGPU/CMakeLists.txt
    A llvm/lib/Target/AMDGPU/GCNPreRAOptimizations.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstructions.td
    M llvm/test/CodeGen/AMDGPU/GlobalISel/cvt_f32_ubyte.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/floor.f64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fshl.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fshr.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.global.atomic.csub.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/mubuf-global.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/roundeven.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/urem.i64.ll
    M llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-idiv.ll
    A llvm/test/CodeGen/AMDGPU/combine-sreg64-inits.mir
    M llvm/test/CodeGen/AMDGPU/ds_write2.ll
    M llvm/test/CodeGen/AMDGPU/inline-asm.ll
    M llvm/test/CodeGen/AMDGPU/inline-constraints.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_elt.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_elt.v2i16.ll
    M llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
    M llvm/test/CodeGen/AMDGPU/llvm.round.f64.ll
    M llvm/test/CodeGen/AMDGPU/packed-fp32.ll
    M llvm/test/CodeGen/AMDGPU/promote-alloca-vector-to-vector.ll
    A llvm/test/CodeGen/AMDGPU/remat-fp64-constants.ll
    M llvm/test/CodeGen/AMDGPU/sdiv64.ll
    M llvm/test/CodeGen/AMDGPU/shift-i128.ll
    M llvm/test/CodeGen/AMDGPU/shl.ll
    M llvm/test/CodeGen/AMDGPU/sopk-compares.ll
    M llvm/test/CodeGen/AMDGPU/srem64.ll
    M llvm/test/CodeGen/AMDGPU/udiv64.ll
    M llvm/test/CodeGen/AMDGPU/urem64.ll
    M llvm/test/CodeGen/AMDGPU/wwm-reserved-spill.ll

  Log Message:
  -----------
  [AMDGPU] Add S_MOV_B64_IMM_PSEUDO for wide constants

This is to allow 64 bit constant rematerialization. If a constant
is split into two separate moves initializing sub0 and sub1 like
now RA cannot rematerizalize a 64 bit register.

This gives 10-20% uplift in a set of huge apps heavily using double
precession math.

Fixes: SWDEV-292645

Differential Revision: https://reviews.llvm.org/D104874