68fab44acf
This can fold the immediate into the physical destination, but this
should not look for further users of the register. Fixes regression
introduced by 766cb615a3.
113 lines
3.0 KiB
YAML
113 lines
3.0 KiB
YAML
# RUN: llc -march=amdgcn -run-pass si-fold-operands -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s
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# GCN-LABEL: name: fold-imm-copy
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# GCN: [[SREG:%[0-9+]]]:sreg_32_xm0 = S_MOV_B32 65535
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# GCN: V_AND_B32_e32 [[SREG]]
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---
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name: fold-imm-copy
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $vgpr0, $sgpr0_sgpr1
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%0:vgpr_32 = COPY $vgpr0
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%1:sgpr_64 = COPY $sgpr0_sgpr1
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%2:sgpr_128 = S_LOAD_DWORDX4_IMM %1, 9, 0, 0
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%3:sreg_32_xm0 = S_MOV_B32 2
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%4:vgpr_32 = V_LSHLREV_B32_e64 killed %3, %0, implicit $exec
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%5:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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%6:vreg_64 = REG_SEQUENCE killed %4, %subreg.sub0, killed %5, %subreg.sub1
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%7:vgpr_32 = BUFFER_LOAD_DWORD_ADDR64 %6, %2, 0, 4, 0, 0, 0, 0, 0, implicit $exec
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%8:sreg_32_xm0 = S_MOV_B32 65535
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%9:vgpr_32 = COPY %8
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%10:vgpr_32 = V_AND_B32_e32 %7, %9, implicit $exec
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...
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---
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# GCN-LABEL: name: no_extra_fold_on_same_opnd
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# The first XOR needs commuting to fold that immediate operand.
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# GCN: V_XOR_B32_e32 0, %1
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# GCN: V_XOR_B32_e32 %2, %4.sub0
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name: no_extra_fold_on_same_opnd
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tracksRegLiveness: true
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body: |
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bb.0:
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%0:vgpr_32 = IMPLICIT_DEF
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%1:vgpr_32 = IMPLICIT_DEF
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%2:vgpr_32 = IMPLICIT_DEF
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%3:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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%4:vreg_64 = REG_SEQUENCE killed %0, %subreg.sub0, killed %3, %subreg.sub1
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%5:vgpr_32 = V_XOR_B32_e32 %1, %4.sub1, implicit $exec
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%6:vgpr_32 = V_XOR_B32_e32 %2, %4.sub0, implicit $exec
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...
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---
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# Make sure the subreg index is not reinterpreted when folding
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# immediates
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#
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# GCN-LABEL: name: clear_subreg_imm_fold{{$}}
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# GCN: %1:sgpr_32 = S_MOV_B32 4294967288
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# GCN: %2:sgpr_32 = S_MOV_B32 4294967295
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name: clear_subreg_imm_fold
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tracksRegLiveness: true
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body: |
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bb.0:
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%0:sreg_64 = S_MOV_B64 -8
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%1:sgpr_32 = COPY %0.sub0
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%2:sgpr_32 = COPY %0.sub1
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S_ENDPGM 0, implicit %1, implicit %2
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...
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# GCN-LABEL: name: no_fold_imm_into_m0{{$}}
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# GCN: %0:sreg_32 = S_MOV_B32 -8
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# GCN-NEXT: $m0 = COPY %0
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---
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name: no_fold_imm_into_m0
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tracksRegLiveness: true
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body: |
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bb.0:
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%0:sreg_32 = S_MOV_B32 -8
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$m0 = COPY %0
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S_ENDPGM 0, implicit $m0
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...
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# GCN-LABEL: name: fold_sgpr_imm_to_vgpr_copy{{$}}
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# GCN: $vgpr0 = V_MOV_B32_e32 -8, implicit $exec
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---
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name: fold_sgpr_imm_to_vgpr_copy
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tracksRegLiveness: true
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body: |
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bb.0:
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%0:sreg_32 = S_MOV_B32 -8
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$vgpr0 = COPY %0
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S_ENDPGM 0, implicit $vgpr0
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...
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# The users of $vgpr1 should not be visited for further immediate
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# folding.
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# GCN-LABEL: name: no_fold_physreg_users_vgpr{{$}}
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# GCN: $vgpr1 = V_MOV_B32_e32 0, implicit $exec
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# GCN-NEXT: S_NOP 0, implicit-def $vgpr1
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# GCN-NEXT: %2:vgpr_32 = COPY $vgpr1
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# GCN-NEXT: $vgpr2 = COPY %2
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---
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name: no_fold_physreg_users_vgpr
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tracksRegLiveness: true
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body: |
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bb.0:
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%0:sreg_32 = S_MOV_B32 0
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%1:vgpr_32 = COPY %0
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$vgpr1 = COPY %0
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S_NOP 0, implicit-def $vgpr1
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%2:vgpr_32 = COPY $vgpr1
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$vgpr2 = COPY %2
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S_ENDPGM 0
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...
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