1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -verify-machineinstrs -run-pass=prologepilog -o - %s | FileCheck -check-prefix=GCN %s
# The scratch register vgpr0 is used here to spill sgpr35 register.
# The function also returns a value that goes via. vgpr0.
# This test is to ensure the vgpr0 store/restore inserted at the prolog/epilog
# preserves only its inactive lanes to ensure the outgoing value will not be overwritten.
---
name: preserve_scratch_vgpr_inactive_lanes
tracksRegLiveness: true
machineFunctionInfo:
scratchRSrcReg: $sgpr0_sgpr1_sgpr2_sgpr3
frameOffsetReg: $sgpr33
stackPtrOffsetReg: $sgpr32
body: |
bb.0:
liveins: $sgpr35, $vgpr0, $sgpr30_sgpr31
; GCN-LABEL: name: preserve_scratch_vgpr_inactive_lanes
; GCN: liveins: $sgpr35, $vgpr0, $sgpr30_sgpr31
; GCN-NEXT: {{ $}}
; GCN-NEXT: $vgpr0 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr0
; GCN-NEXT: $sgpr35 = S_MOV_B32 5
; GCN-NEXT: $sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr0, 0
; GCN-NEXT: renamable $vgpr0 = V_MOV_B32_e32 10, implicit $exec
; GCN-NEXT: S_SETPC_B64_return killed renamable $sgpr30_sgpr31, implicit $vgpr0
renamable $vgpr0 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr0
$sgpr35 = S_MOV_B32 5
$sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr0, 0
renamable $vgpr0 = V_MOV_B32_e32 10, implicit $exec
S_SETPC_B64_return killed renamable $sgpr30_sgpr31, implicit $vgpr0
...
|
