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The SchedModel allows the addition of ReadAdvances to express that certain operands of the instructions are needed at a later point than the others. RegAlloc may add pseudo operands that are not part of the instruction descriptor, and therefore cannot have any read advance entries. This meant that in some cases the desired read advance was nullified by such a pseudo operand, which still had the original latency. This patch fixes this by making sure that such pseudo operands get a zero latency during DAG construction. Review: Matthias Braun, Ulrich Weigand. https://reviews.llvm.org/D49671 llvm-svn: 345606
46 lines
2.4 KiB
YAML
46 lines
2.4 KiB
YAML
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=fiji -verify-machineinstrs -run-pass=post-RA-sched -o - %s | FileCheck %s
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# Make sure ScheduleDAGInstrs::fixupKills does not produce invalid kill flags.
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---
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name: func0
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $sgpr7, $sgpr0_sgpr1_sgpr2_sgpr3
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$sgpr33 = S_MOV_B32 $sgpr7
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$sgpr32 = S_MOV_B32 $sgpr33
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$sgpr10 = S_MOV_B32 5
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$sgpr9 = S_MOV_B32 4
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$sgpr8 = S_MOV_B32 3
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BUNDLE implicit-def $sgpr6_sgpr7, implicit-def $sgpr6, implicit-def $sgpr7, implicit-def $scc {
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$sgpr6_sgpr7 = S_GETPC_B64
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$sgpr6 = S_ADD_U32 internal $sgpr6, 0, implicit-def $scc
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$sgpr7 = S_ADDC_U32 internal $sgpr7,0, implicit-def $scc, implicit internal $scc
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}
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$sgpr4 = S_MOV_B32 $sgpr33
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$vgpr0 = V_MOV_B32_e32 $sgpr8, implicit $exec, implicit-def $vgpr0_vgpr1_vgpr2_vgpr3, implicit $sgpr8_sgpr9_sgpr10_sgpr11
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$vgpr1 = V_MOV_B32_e32 $sgpr9, implicit $exec, implicit $sgpr8_sgpr9_sgpr10_sgpr11
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$vgpr2 = V_MOV_B32_e32 $sgpr10, implicit $exec, implicit $sgpr8_sgpr9_sgpr10_sgpr11
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$vgpr3 = V_MOV_B32_e32 $sgpr11, implicit $exec, implicit $sgpr8_sgpr9_sgpr10_sgpr11, implicit $exec
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S_NOP 0, implicit killed $sgpr6_sgpr7, implicit $sgpr0_sgpr1_sgpr2_sgpr3, implicit $sgpr4, implicit killed $vgpr0_vgpr1_vgpr2_vgpr3
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S_ENDPGM
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...
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# CHECK-LABEL: name: func0
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# CHECK-DAG: $sgpr10 = S_MOV_B32 5
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# CHECK-DAG: $sgpr9 = S_MOV_B32 4
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# CHECK-DAG: $sgpr8 = S_MOV_B32 3
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# CHECK-DAG: $sgpr33 = S_MOV_B32 killed $sgpr7
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# CHECK: $vgpr0 = V_MOV_B32_e32 $sgpr8, implicit $exec, implicit-def $vgpr0_vgpr1_vgpr2_vgpr3, implicit $sgpr8_sgpr9_sgpr10_sgpr11
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# CHECK: $sgpr32 = S_MOV_B32 $sgpr33
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# CHECK: BUNDLE implicit-def $sgpr6_sgpr7, implicit-def $sgpr6, implicit-def $sgpr7, implicit-def $scc {
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# CHECK: $sgpr6_sgpr7 = S_GETPC_B64
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# CHECK: $sgpr6 = S_ADD_U32 internal $sgpr6, 0, implicit-def $scc
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# CHECK: $sgpr7 = S_ADDC_U32 internal $sgpr7, 0, implicit-def $scc, implicit internal $scc
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# CHECK: }
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# CHECK: $sgpr4 = S_MOV_B32 killed $sgpr33
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# CHECK: $vgpr1 = V_MOV_B32_e32 $sgpr9, implicit $exec, implicit $sgpr8_sgpr9_sgpr10_sgpr11
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# CHECK: $vgpr2 = V_MOV_B32_e32 $sgpr10, implicit $exec, implicit $sgpr8_sgpr9_sgpr10_sgpr11
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# CHECK: $vgpr3 = V_MOV_B32_e32 killed $sgpr11, implicit $exec, implicit $sgpr8_sgpr9_sgpr10_sgpr11, implicit $exec
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# CHECK: S_NOP 0, implicit killed $sgpr6_sgpr7, implicit $sgpr0_sgpr1_sgpr2_sgpr3, implicit $sgpr4, implicit killed $vgpr0_vgpr1_vgpr2_vgpr3
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# CHECK: S_ENDPGM
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