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