llvm/test/CodeGen/AMDGPU/fold-reload-into-exec.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs -stress-regalloc=2 -start-before=greedy -stop-after=virtregmap -o - %s | FileCheck %s

# Test that a spill of a copy of exec is not folded to be a spill of exec directly.

---

name:            merge_sgpr_spill_into_copy_from_exec_lo
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: merge_sgpr_spill_into_copy_from_exec_lo
    ; CHECK: S_NOP 0, implicit-def $exec_lo
    ; CHECK-NEXT: $sgpr0 = S_MOV_B32 $exec_lo
    ; CHECK-NEXT: $vgpr0 = IMPLICIT_DEF
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr0, 0, $vgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: S_NOP 0, implicit-def dead renamable $sgpr1, implicit-def dead renamable $sgpr0, implicit killed renamable $sgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: $exec_lo = S_MOV_B32 killed $sgpr0
    ; CHECK-NEXT: S_SENDMSG 0, implicit $m0, implicit $exec
    S_NOP 0, implicit-def $exec_lo
    %0:sreg_32 = COPY $exec_lo
    S_NOP 0, implicit-def %1:sreg_32, implicit-def %2:sreg_32, implicit %0
    $exec_lo = COPY %0
    S_SENDMSG 0, implicit $m0, implicit $exec

...
---

name:            merge_sgpr_spill_into_copy_from_exec_hi
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: merge_sgpr_spill_into_copy_from_exec_hi
    ; CHECK: S_NOP 0, implicit-def $exec_hi
    ; CHECK-NEXT: $sgpr0 = S_MOV_B32 $exec_hi
    ; CHECK-NEXT: $vgpr0 = IMPLICIT_DEF
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr0, 0, $vgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: S_NOP 0, implicit-def dead renamable $sgpr1, implicit-def dead renamable $sgpr0, implicit killed renamable $sgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: $exec_hi = S_MOV_B32 killed $sgpr0
    ; CHECK-NEXT: S_SENDMSG 0, implicit $m0, implicit $exec
    S_NOP 0, implicit-def $exec_hi
    %0:sreg_32 = COPY $exec_hi
    S_NOP 0, implicit-def %1:sreg_32, implicit-def %2:sreg_32, implicit %0
    $exec_hi = COPY %0
    S_SENDMSG 0, implicit $m0, implicit $exec

...
---

name:            merge_sgpr_spill_into_copy_from_exec
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: merge_sgpr_spill_into_copy_from_exec
    ; CHECK: S_NOP 0, implicit-def $exec
    ; CHECK-NEXT: $sgpr0_sgpr1 = S_MOV_B64 $exec
    ; CHECK-NEXT: $vgpr0 = IMPLICIT_DEF
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr0, 0, $vgpr0, implicit-def $sgpr0_sgpr1, implicit $sgpr0_sgpr1
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr1, 1, $vgpr0, implicit $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0, implicit-def $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr1 = V_READLANE_B32 $vgpr0, 1
    ; CHECK-NEXT: S_NOP 0, implicit-def dead renamable $sgpr2_sgpr3, implicit-def dead renamable $sgpr0_sgpr1, implicit killed renamable $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0, implicit-def $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr1 = V_READLANE_B32 $vgpr0, 1
    ; CHECK-NEXT: $exec = S_MOV_B64 killed $sgpr0_sgpr1
    ; CHECK-NEXT: S_SENDMSG 0, implicit $m0, implicit $exec
    S_NOP 0, implicit-def $exec
    %0:sreg_64 = COPY $exec
    S_NOP 0, implicit-def %1:sreg_64, implicit-def %2:sreg_64, implicit %0
    $exec = COPY %0
    S_SENDMSG 0, implicit $m0, implicit $exec

...

# Test that a reload into a copy of exec is not folded to be a reload of exec directly.

---

name:            reload_sgpr_spill_into_copy_to_exec_lo
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: reload_sgpr_spill_into_copy_to_exec_lo
    ; CHECK: S_NOP 0, implicit-def renamable $sgpr0, implicit-def dead renamable $sgpr1, implicit-def $exec_lo
    ; CHECK-NEXT: $vgpr0 = IMPLICIT_DEF
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr0, 0, $vgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: S_NOP 0, implicit killed renamable $sgpr0, implicit-def dead renamable $sgpr1, implicit-def dead renamable $sgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: $exec_lo = S_MOV_B32 killed $sgpr0
    ; CHECK-NEXT: S_SENDMSG 0, implicit $m0, implicit $exec
    S_NOP 0, implicit-def %0:sreg_32, implicit-def %1:sreg_32, implicit-def $exec_lo
    S_NOP 0, implicit %0, implicit-def %3:sreg_32, implicit-def %4:sreg_32
    $exec_lo = COPY %0
    S_SENDMSG 0, implicit $m0, implicit $exec

...
---

name:            reload_sgpr_spill_into_copy_to_exec_hi
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: reload_sgpr_spill_into_copy_to_exec_hi
    ; CHECK: S_NOP 0, implicit-def renamable $sgpr0, implicit-def dead renamable $sgpr1, implicit-def $exec_hi
    ; CHECK-NEXT: $vgpr0 = IMPLICIT_DEF
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr0, 0, $vgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: S_NOP 0, implicit killed renamable $sgpr0, implicit-def dead renamable $sgpr1, implicit-def dead renamable $sgpr0
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0
    ; CHECK-NEXT: $exec_hi = S_MOV_B32 killed $sgpr0
    ; CHECK-NEXT: S_SENDMSG 0, implicit $m0, implicit $exec
    S_NOP 0, implicit-def %0:sreg_32, implicit-def %1:sreg_32, implicit-def $exec_hi
    S_NOP 0, implicit %0, implicit-def %3:sreg_32, implicit-def %4:sreg_32
    $exec_hi = COPY %0
    S_SENDMSG 0, implicit $m0, implicit $exec

...
---

name:            reload_sgpr_spill_into_copy_to_exec
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: reload_sgpr_spill_into_copy_to_exec
    ; CHECK: S_NOP 0, implicit-def renamable $sgpr0_sgpr1, implicit-def dead renamable $sgpr2_sgpr3, implicit-def $exec
    ; CHECK-NEXT: $vgpr0 = IMPLICIT_DEF
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr0, 0, $vgpr0, implicit-def $sgpr0_sgpr1, implicit $sgpr0_sgpr1
    ; CHECK-NEXT: $vgpr0 = V_WRITELANE_B32 killed $sgpr1, 1, $vgpr0, implicit $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0, implicit-def $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr1 = V_READLANE_B32 $vgpr0, 1
    ; CHECK-NEXT: S_NOP 0, implicit killed renamable $sgpr0_sgpr1, implicit-def dead renamable $sgpr2_sgpr3, implicit-def dead renamable $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr0 = V_READLANE_B32 $vgpr0, 0, implicit-def $sgpr0_sgpr1
    ; CHECK-NEXT: $sgpr1 = V_READLANE_B32 $vgpr0, 1
    ; CHECK-NEXT: $exec = S_MOV_B64 killed $sgpr0_sgpr1
    ; CHECK-NEXT: S_SENDMSG 0, implicit $m0, implicit $exec
    S_NOP 0, implicit-def %0:sreg_64, implicit-def %1:sreg_64, implicit-def $exec
    S_NOP 0, implicit %0, implicit-def %3:sreg_64, implicit-def %4:sreg_64
    $exec = COPY %0
    S_SENDMSG 0, implicit $m0, implicit $exec

...