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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 2
# RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -verify-machineinstrs -run-pass=prologepilog -o - %s | FileCheck -check-prefix=GCN %s
--- |
declare amdgpu_cs_chain void @callee()
declare amdgpu_gfx void @gfx_callee()
define amdgpu_cs_chain_preserve void @preserve_active_lanes_above_args() {ret void}
define amdgpu_cs_chain_preserve void @preserve_all_lanes_wwm_above_args() {ret void}
define amdgpu_cs_chain_preserve void @dont_preserve_args() {ret void}
define amdgpu_cs_chain_preserve void @preserve_inactive_lanes_wwm_args() {ret void}
define amdgpu_cs_chain_preserve void @dont_preserve_if_no_chain_calls() {ret void}
define amdgpu_cs_chain_preserve void @dont_preserve_v0_v7() {ret void}
define amdgpu_cs_chain_preserve void @dont_preserve_sgpr() {ret void}
...
---
# NOTE: Since we don't know what the args are, we rely on the fact that we can't
# call llvm.amdgcn.cs.chain with more parameters than we received - so anything
# that is used by the SI_CS_CHAIN_TC_W32 is assumed to have been an arg and therefore
# not preserved.
---
name: preserve_active_lanes_above_args
tracksRegLiveness: true
frameInfo:
hasTailCall: true
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
body: |
bb.0:
liveins: $sgpr0, $vgpr8, $vgpr9
; GCN-LABEL: name: preserve_active_lanes_above_args
; GCN: liveins: $sgpr0, $vgpr8, $vgpr9, $vgpr10
; GCN-NEXT: {{ $}}
; GCN-NEXT: SCRATCH_STORE_DWORD_ST killed $vgpr10, 0, 0, implicit $exec, implicit $flat_scr :: (store (s32) into %stack.0, addrspace 5)
; GCN-NEXT: renamable $vgpr10 = V_MOV_B32_e32 10, implicit $exec
; GCN-NEXT: $vgpr8 = COPY killed renamable $vgpr10
; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
; GCN-NEXT: renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
; GCN-NEXT: $vgpr10 = SCRATCH_LOAD_DWORD_ST 0, 0, implicit $exec, implicit $flat_scr :: (load (s32) from %stack.0, addrspace 5)
; GCN-NEXT: SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
renamable $vgpr10 = V_MOV_B32_e32 10, implicit $exec
$vgpr8 = COPY renamable killed $vgpr10
renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
...
---
name: preserve_all_lanes_wwm_above_args
tracksRegLiveness: true
frameInfo:
hasTailCall: true
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
wwmReservedRegs:
- '$vgpr11'
body: |
bb.0:
liveins: $sgpr0, $sgpr35, $vgpr8, $vgpr9, $vgpr10
; GCN-LABEL: name: preserve_all_lanes_wwm_above_args
; GCN: liveins: $sgpr0, $sgpr35, $vgpr8, $vgpr9, $vgpr10
; GCN-NEXT: {{ $}}
; GCN-NEXT: $sgpr1 = S_OR_SAVEEXEC_B32 -1, implicit-def $exec, implicit-def dead $scc, implicit $exec
; GCN-NEXT: SCRATCH_STORE_DWORD_ST $vgpr10, 0, 0, implicit $exec, implicit $flat_scr :: (store (s32) into %stack.0, addrspace 5)
; GCN-NEXT: SCRATCH_STORE_DWORD_ST killed $vgpr11, 4, 0, implicit $exec, implicit $flat_scr :: (store (s32) into %stack.1, addrspace 5)
; GCN-NEXT: $exec_lo = S_MOV_B32 killed $sgpr1
; GCN-NEXT: renamable $vgpr10 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr10
; GCN-NEXT: $sgpr35 = S_MOV_B32 5
; GCN-NEXT: $sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr10, 0
; GCN-NEXT: renamable $vgpr10 = V_MOV_B32_e32 10, implicit $exec
; GCN-NEXT: $vgpr8 = COPY killed renamable $vgpr10
; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
; GCN-NEXT: renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
; GCN-NEXT: $sgpr1 = S_OR_SAVEEXEC_B32 -1, implicit-def $exec, implicit-def dead $scc, implicit $exec
; GCN-NEXT: $vgpr10 = SCRATCH_LOAD_DWORD_SADDR $sgpr32, 0, 0, implicit $exec, implicit $flat_scr :: (load (s32) from %stack.0, addrspace 5)
; GCN-NEXT: $vgpr11 = SCRATCH_LOAD_DWORD_SADDR $sgpr32, 4, 0, implicit $exec, implicit $flat_scr :: (load (s32) from %stack.1, addrspace 5)
; GCN-NEXT: $exec_lo = S_MOV_B32 killed $sgpr1
; GCN-NEXT: SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
renamable $vgpr10 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr10
$sgpr35 = S_MOV_B32 5
$sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr10, 0
renamable $vgpr10 = V_MOV_B32_e32 10, implicit $exec
$vgpr8 = COPY renamable killed $vgpr10
renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
...
---
name: dont_preserve_args
tracksRegLiveness: true
frameInfo:
hasTailCall: true
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
body: |
bb.0:
liveins: $sgpr0, $vgpr8, $vgpr9
; GCN-LABEL: name: dont_preserve_args
; GCN: liveins: $sgpr0, $vgpr8, $vgpr9
; GCN-NEXT: {{ $}}
; GCN-NEXT: renamable $vgpr8 = V_MOV_B32_e32 10, implicit $exec
; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
; GCN-NEXT: renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
; GCN-NEXT: SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
renamable $vgpr8 = V_MOV_B32_e32 10, implicit $exec
renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
...
---
name: preserve_inactive_lanes_wwm_args
tracksRegLiveness: true
frameInfo:
hasTailCall: true
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
wwmReservedRegs:
- '$vgpr9'
body: |
bb.0:
liveins: $sgpr0, $sgpr35, $vgpr8, $vgpr9, $vgpr10
; GCN-LABEL: name: preserve_inactive_lanes_wwm_args
; GCN: liveins: $sgpr0, $sgpr35, $vgpr8, $vgpr9, $vgpr10
; GCN-NEXT: {{ $}}
; GCN-NEXT: $sgpr1 = S_OR_SAVEEXEC_B32 -1, implicit-def $exec, implicit-def dead $scc, implicit $exec
; GCN-NEXT: SCRATCH_STORE_DWORD_ST $vgpr8, 0, 0, implicit $exec, implicit $flat_scr :: (store (s32) into %stack.0, addrspace 5)
; GCN-NEXT: SCRATCH_STORE_DWORD_ST $vgpr9, 4, 0, implicit $exec, implicit $flat_scr :: (store (s32) into %stack.1, addrspace 5)
; GCN-NEXT: $exec_lo = S_MOV_B32 killed $sgpr1
; GCN-NEXT: renamable $vgpr8 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr8
; GCN-NEXT: $sgpr35 = S_MOV_B32 5
; GCN-NEXT: $sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr8, 0
; GCN-NEXT: renamable $vgpr8 = V_MOV_B32_e32 10, implicit $exec
; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
; GCN-NEXT: renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
; GCN-NEXT: $sgpr1 = S_OR_SAVEEXEC_B32 -1, implicit-def $exec, implicit-def dead $scc, implicit $exec
; GCN-NEXT: $vgpr8 = SCRATCH_LOAD_DWORD_SADDR $sgpr32, 0, 0, implicit $exec, implicit $flat_scr, implicit $vgpr8(tied-def 0) :: (load (s32) from %stack.0, addrspace 5)
; GCN-NEXT: $vgpr9 = SCRATCH_LOAD_DWORD_SADDR $sgpr32, 4, 0, implicit $exec, implicit $flat_scr, implicit $vgpr9(tied-def 0) :: (load (s32) from %stack.1, addrspace 5)
; GCN-NEXT: $exec_lo = S_MOV_B32 killed $sgpr1
; GCN-NEXT: SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
renamable $vgpr8 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr8
$sgpr35 = S_MOV_B32 5
$sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr8, 0
renamable $vgpr8 = V_MOV_B32_e32 10, implicit $exec
renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
...
---
name: dont_preserve_if_no_chain_calls
tracksRegLiveness: true
frameInfo:
hasTailCall: false
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
wwmReservedRegs:
- '$vgpr9'
body: |
bb.0:
liveins: $sgpr0, $sgpr35, $vgpr0, $vgpr8, $vgpr9
; GCN-LABEL: name: dont_preserve_if_no_chain_calls
; GCN: liveins: $sgpr0, $sgpr35, $vgpr0, $vgpr8, $vgpr9
; GCN-NEXT: {{ $}}
; GCN-NEXT: renamable $vgpr8 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr8
; GCN-NEXT: $sgpr35 = S_MOV_B32 5
; GCN-NEXT: $sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr8, 0
; GCN-NEXT: renamable $vgpr8 = V_MOV_B32_e32 10, implicit $exec
; GCN-NEXT: $vgpr9 = V_MOV_B32_e32 20, implicit $exec
; GCN-NEXT: $vgpr10 = V_MOV_B32_e32 30, implicit $exec
; GCN-NEXT: S_ENDPGM 0
renamable $vgpr8 = SI_SPILL_S32_TO_VGPR $sgpr35, 0, killed $vgpr8
$sgpr35 = S_MOV_B32 5
$sgpr35 = SI_RESTORE_S32_FROM_VGPR $vgpr8, 0
renamable $vgpr8 = V_MOV_B32_e32 10, implicit $exec
$vgpr9 = V_MOV_B32_e32 20, implicit $exec
$vgpr10 = V_MOV_B32_e32 30, implicit $exec
S_ENDPGM 0
...
---
name: dont_preserve_v0_v7
tracksRegLiveness: true
frameInfo:
hasTailCall: true
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
wwmReservedRegs:
- '$vgpr1'
body: |
bb.0:
liveins: $sgpr0, $sgpr35, $vgpr0, $vgpr8
; GCN-LABEL: name: dont_preserve_v0_v7
; GCN: liveins: $sgpr0, $sgpr35, $vgpr0, $vgpr8
; GCN-NEXT: {{ $}}
; GCN-NEXT: renamable $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: renamable $vgpr7 = V_MOV_B32_e32 16, implicit $exec
; GCN-NEXT: renamable $vgpr8 = COPY killed renamable $vgpr0
; GCN-NEXT: renamable $vgpr9 = COPY killed renamable $vgpr7
; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
; GCN-NEXT: renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
; GCN-NEXT: SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
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
renamable $vgpr7 = V_MOV_B32_e32 16, implicit $exec
renamable $vgpr8 = COPY killed renamable $vgpr0
renamable $vgpr9 = COPY killed renamable $vgpr7
renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0, implicit $vgpr8, implicit $vgpr9
...
---
name: dont_preserve_sgpr
tracksRegLiveness: true
frameInfo:
hasTailCall: true
machineFunctionInfo:
stackPtrOffsetReg: '$sgpr32'
isChainFunction: true
returnsVoid: true
body: |
bb.0:
liveins: $sgpr0
; GCN-LABEL: name: dont_preserve_sgpr
; GCN: liveins: $sgpr0
; GCN-NEXT: {{ $}}
; GCN-NEXT: renamable $sgpr1 = S_ADD_I32 killed renamable $sgpr0, renamable $sgpr0, implicit-def dead $scc
; GCN-NEXT: $sgpr0 = COPY killed renamable $sgpr1
; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
; GCN-NEXT: renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
; GCN-NEXT: SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0
renamable $sgpr1 = S_ADD_I32 killed renamable $sgpr0, renamable $sgpr0, implicit-def dead $scc
$sgpr0 = COPY killed renamable $sgpr1
renamable $sgpr4_sgpr5 = SI_PC_ADD_REL_OFFSET target-flags(amdgpu-gotprel32-lo) @callee + 4, target-flags(amdgpu-gotprel32-hi) @callee + 12, implicit-def dead $scc
renamable $sgpr4_sgpr5 = S_LOAD_DWORDX2_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (p0) from got, addrspace 4)
SI_CS_CHAIN_TC_W32 killed renamable $sgpr4_sgpr5, @callee, 0, -1, amdgpu_allvgprs, implicit $sgpr0
...
|
