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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -march=amdgcn -mcpu=gfx900 -o - -verify-coalescing -run-pass=simple-register-coalescing %s | FileCheck -check-prefix=GCN %s
---
# Do not rematerialize V_MOV_B32 at COPY because source register %1 is killed.
name: no_remat_killed_src_in_inst
tracksRegLiveness: true
body: |
bb.0:
liveins: $vgpr0
; GCN-LABEL: name: no_remat_killed_src_in_inst
; GCN: liveins: $vgpr0
; GCN-NEXT: {{ $}}
; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GCN-NEXT: [[V_ADD_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e32 1, [[COPY]], implicit $exec
; GCN-NEXT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 [[V_ADD_U32_e32_]], implicit $exec
; GCN-NEXT: $vgpr0 = COPY [[V_MOV_B32_e32_]]
; GCN-NEXT: SI_RETURN_TO_EPILOG $vgpr0
%0:vgpr_32 = COPY $vgpr0
%1:vgpr_32 = V_ADD_U32_e32 1, %0, implicit $exec
%2:vgpr_32 = V_MOV_B32_e32 killed %1, implicit $exec
$vgpr0 = COPY killed %2
SI_RETURN_TO_EPILOG killed $vgpr0
...
---
# Do not rematerialize V_MOV_B32 at COPY because source register %1 is killed
# after the MOV but before the COPY.
name: no_remat_killed_src_after_inst
tracksRegLiveness: true
body: |
bb.0:
liveins: $vgpr0
; GCN-LABEL: name: no_remat_killed_src_after_inst
; GCN: liveins: $vgpr0
; GCN-NEXT: {{ $}}
; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GCN-NEXT: [[V_ADD_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e32 1, [[COPY]], implicit $exec
; GCN-NEXT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 [[V_ADD_U32_e32_]], implicit $exec
; GCN-NEXT: KILL [[V_ADD_U32_e32_]]
; GCN-NEXT: $vgpr0 = COPY [[V_MOV_B32_e32_]]
; GCN-NEXT: SI_RETURN_TO_EPILOG $vgpr0
%0:vgpr_32 = COPY $vgpr0
%1:vgpr_32 = V_ADD_U32_e32 1, %0, implicit $exec
%2:vgpr_32 = V_MOV_B32_e32 %1, implicit $exec
KILL %1
$vgpr0 = COPY killed %2
SI_RETURN_TO_EPILOG killed $vgpr0
...
---
# Even if %1 is not killed do not rematerialize V_MOV_B32 so that we do not
# extend %1 liverange.
name: no_remat_alive_src_in_inst_unused
tracksRegLiveness: true
body: |
bb.0:
liveins: $vgpr0
; GCN-LABEL: name: no_remat_alive_src_in_inst_unused
; GCN: liveins: $vgpr0
; GCN-NEXT: {{ $}}
; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GCN-NEXT: [[V_ADD_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e32 1, [[COPY]], implicit $exec
; GCN-NEXT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 [[V_ADD_U32_e32_]], implicit $exec
; GCN-NEXT: $vgpr0 = COPY [[V_MOV_B32_e32_]]
; GCN-NEXT: SI_RETURN_TO_EPILOG $vgpr0
%0:vgpr_32 = COPY $vgpr0
%1:vgpr_32 = V_ADD_U32_e32 1, %0, implicit $exec
%2:vgpr_32 = V_MOV_B32_e32 %1, implicit $exec
$vgpr0 = COPY killed %2
SI_RETURN_TO_EPILOG killed $vgpr0
...
---
# Rematerialize V_MOV_B32 since %1 is available at COPY and still alive.
name: remat_alive_src_in_inst_used_and_available
tracksRegLiveness: true
body: |
bb.0:
liveins: $vgpr0
; GCN-LABEL: name: remat_alive_src_in_inst_used_and_available
; GCN: liveins: $vgpr0
; GCN-NEXT: {{ $}}
; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GCN-NEXT: [[V_ADD_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e32 1, [[COPY]], implicit $exec
; GCN-NEXT: $vgpr0 = V_MOV_B32_e32 [[V_ADD_U32_e32_]], implicit $exec
; GCN-NEXT: SI_RETURN_TO_EPILOG $vgpr0
%0:vgpr_32 = COPY $vgpr0
%1:vgpr_32 = V_ADD_U32_e32 1, %0, implicit $exec
%2:vgpr_32 = V_MOV_B32_e32 %1, implicit $exec
$vgpr0 = COPY killed %2, implicit %1
SI_RETURN_TO_EPILOG killed $vgpr0
...
|
