derek.holloway
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37 lines
1.7 KiB
YAML
37 lines
1.7 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -verify-machineinstrs -run-pass=prologepilog -o - %s | FileCheck -check-prefix=GCN %s
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# The scratch register vgpr0 is used here to spill sgpr35 register.
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# The function also returns a value that goes via. vgpr0.
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# This test is to ensure the vgpr0 store/restore inserted at the prolog/epilog
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# preserves only its inactive lanes to ensure the outgoing value will not be overwritten.
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---
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name: preserve_scratch_vgpr_inactive_lanes
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tracksRegLiveness: true
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machineFunctionInfo:
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scratchRSrcReg: $sgpr0_sgpr1_sgpr2_sgpr3
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frameOffsetReg: $sgpr33
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stackPtrOffsetReg: $sgpr32
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body: |
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bb.0:
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liveins: $sgpr35, $vgpr0, $sgpr30_sgpr31
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; GCN-LABEL: name: preserve_scratch_vgpr_inactive_lanes
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; GCN: liveins: $sgpr35, $vgpr0, $sgpr30_sgpr31
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; GCN-NEXT: {{ $}}
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; GCN-NEXT: frame-setup CFI_INSTRUCTION llvm_def_aspace_cfa $sgpr32, 0, 6
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; GCN-NEXT: frame-setup CFI_INSTRUCTION llvm_register_pair $pc_reg, $sgpr30, 32, $sgpr31, 32
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; GCN-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr0
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; GCN-NEXT: $vgpr0 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr0
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; GCN-NEXT: $sgpr35 = S_MOV_B32 5
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; GCN-NEXT: $sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr0, 0
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; GCN-NEXT: renamable $vgpr0 = V_MOV_B32_e32 10, implicit $exec
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; GCN-NEXT: S_SETPC_B64_return killed renamable $sgpr30_sgpr31, implicit $vgpr0
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renamable $vgpr0 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr0
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$sgpr35 = S_MOV_B32 5
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$sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr0, 0
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renamable $vgpr0 = V_MOV_B32_e32 10, implicit $exec
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S_SETPC_B64_return killed renamable $sgpr30_sgpr31, implicit $vgpr0
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...
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