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AMDGPU: Fix incorrectly deleting copies after spilling SGPR tuples The implicit def of the super register would appear to kill any live uses of components before the spill, and would be deleted by MachineCopyPropagation. We need to add implicit uses of the super register, similarly to what copyPhysReg does. VGPR tuples appear to be correctly handled already. I need to double check the SGPR->memory path.
2020-08-29 02:58:33 +08:00
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=si-lower-sgpr-spills,prologepilog,machine-cp -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s
# Make sure the initial first $sgpr1 = COPY $sgpr2 copy is not deleted
# by the copy propagation after lowering the spill.
---
name: spill_sgpr128_use_subreg
tracksRegLiveness: true
machineFunctionInfo:
hasSpilledSGPRs: true
scratchRSrcReg: $sgpr100_sgpr101_sgpr102_sgpr103
stackPtrOffsetReg: $sgpr32
stack:
- { id: 0, stack-id: sgpr-spill, type: spill-slot, size: 16, alignment: 4 }
body: |
bb.0:
liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4, $sgpr5, $sgpr6, $sgpr7, $vgpr0, $vgpr1, $vgpr2, $vgpr3
; GCN-LABEL: name: spill_sgpr128_use_subreg
; GCN: liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4, $sgpr5, $sgpr6, $sgpr7, $vgpr0, $vgpr1, $vgpr2, $vgpr3
; GCN: renamable $sgpr1 = COPY $sgpr2
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr0, 0, undef $vgpr0, implicit-def $sgpr0_sgpr1_sgpr2_sgpr3, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr1, 1, $vgpr0, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr2, 2, $vgpr0, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr3, 3, $vgpr0, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: renamable $sgpr8 = COPY killed renamable $sgpr1
; GCN: S_ENDPGM 0, implicit $sgpr8
renamable $sgpr1 = COPY $sgpr2
SI_SPILL_S128_SAVE renamable $sgpr0_sgpr1_sgpr2_sgpr3, %stack.0, implicit $exec, implicit $sgpr100_sgpr101_sgpr102_sgpr103, implicit $sgpr32 :: (store 16 into %stack.0, align 4, addrspace 5)
renamable $sgpr8 = COPY killed renamable $sgpr1
S_ENDPGM 0, implicit $sgpr8
...
---
name: spill_sgpr128_use_kill
tracksRegLiveness: true
machineFunctionInfo:
hasSpilledSGPRs: true
scratchRSrcReg: $sgpr100_sgpr101_sgpr102_sgpr103
stackPtrOffsetReg: $sgpr32
stack:
- { id: 0, stack-id: sgpr-spill, type: spill-slot, size: 16, alignment: 4 }
body: |
bb.0:
liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4, $sgpr5, $sgpr6, $sgpr7, $vgpr0, $vgpr1, $vgpr2, $vgpr3
; GCN-LABEL: name: spill_sgpr128_use_kill
; GCN: liveins: $sgpr0, $sgpr1, $sgpr2, $sgpr3, $sgpr4, $sgpr5, $sgpr6, $sgpr7, $vgpr0, $vgpr1, $vgpr2, $vgpr3
; GCN: renamable $sgpr1 = COPY $sgpr2
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr0, 0, undef $vgpr0, implicit-def $sgpr0_sgpr1_sgpr2_sgpr3, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr1, 1, $vgpr0, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: $vgpr0 = V_WRITELANE_B32_vi $sgpr2, 2, $vgpr0, implicit $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: $vgpr0 = V_WRITELANE_B32_vi killed $sgpr3, 3, $vgpr0, implicit killed $sgpr0_sgpr1_sgpr2_sgpr3
; GCN: S_ENDPGM 0
renamable $sgpr1 = COPY $sgpr2
SI_SPILL_S128_SAVE renamable killed $sgpr0_sgpr1_sgpr2_sgpr3, %stack.0, implicit $exec, implicit $sgpr100_sgpr101_sgpr102_sgpr103, implicit $sgpr32 :: (store 16 into %stack.0, align 4, addrspace 5)
S_ENDPGM 0
...
---
name: spill_vgpr128_use_subreg
tracksRegLiveness: true
machineFunctionInfo:
scratchRSrcReg: $sgpr100_sgpr101_sgpr102_sgpr103
stackPtrOffsetReg: $sgpr32
stack:
- { id: 0, type: spill-slot, size: 16, alignment: 4 }
body: |
bb.0:
liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5, $vgpr6, $vgpr7
; GCN-LABEL: name: spill_vgpr128_use_subreg
; GCN: liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5, $vgpr6, $vgpr7
; GCN: renamable $vgpr1 = COPY $vgpr2
; GCN: BUFFER_STORE_DWORD_OFFSET $vgpr0, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 0, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0, addrspace 5)
; GCN: BUFFER_STORE_DWORD_OFFSET $vgpr1, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 4, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0 + 4, addrspace 5)
; GCN: BUFFER_STORE_DWORD_OFFSET $vgpr2, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 8, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0 + 8, addrspace 5)
; GCN: BUFFER_STORE_DWORD_OFFSET $vgpr3, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 12, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0 + 12, addrspace 5)
; GCN: renamable $vgpr8 = COPY $vgpr2
; GCN: S_ENDPGM 0, implicit $vgpr8
renamable $vgpr1 = COPY $vgpr2
SI_SPILL_V128_SAVE renamable $vgpr0_vgpr1_vgpr2_vgpr3, %stack.0, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 0, implicit $exec :: (store 16 into %stack.0, align 4, addrspace 5)
renamable $vgpr8 = COPY killed renamable $vgpr1
S_ENDPGM 0, implicit $vgpr8
...
---
name: spill_vgpr128_use_kill
tracksRegLiveness: true
machineFunctionInfo:
scratchRSrcReg: $sgpr100_sgpr101_sgpr102_sgpr103
stackPtrOffsetReg: $sgpr32
stack:
- { id: 0, type: spill-slot, size: 16, alignment: 4 }
body: |
bb.0:
liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5, $vgpr6, $vgpr7
; GCN-LABEL: name: spill_vgpr128_use_kill
; GCN: liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5, $vgpr6, $vgpr7
; GCN: renamable $vgpr1 = COPY $vgpr2
; GCN: BUFFER_STORE_DWORD_OFFSET killed $vgpr0, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 0, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0, addrspace 5)
; GCN: BUFFER_STORE_DWORD_OFFSET killed $vgpr1, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 4, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0 + 4, addrspace 5)
; GCN: BUFFER_STORE_DWORD_OFFSET killed $vgpr2, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 8, 0, 0, 0, 0, 0, implicit $exec, implicit $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0 + 8, addrspace 5)
; GCN: BUFFER_STORE_DWORD_OFFSET killed $vgpr3, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 12, 0, 0, 0, 0, 0, implicit $exec, implicit killed $vgpr0_vgpr1_vgpr2_vgpr3 :: (store 4 into %stack.0 + 12, addrspace 5)
; GCN: S_ENDPGM 0
renamable $vgpr1 = COPY $vgpr2
SI_SPILL_V128_SAVE renamable killed $vgpr0_vgpr1_vgpr2_vgpr3, %stack.0, $sgpr100_sgpr101_sgpr102_sgpr103, $sgpr32, 0, implicit $exec :: (store 16 into %stack.0, align 4, addrspace 5)
S_ENDPGM 0
...