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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck --check-prefixes=GFX9-NO-BACKOFF %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -verify-machineinstrs < %s | FileCheck --check-prefixes=GFX9-BACKOFF %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx942 -verify-machineinstrs < %s | FileCheck --check-prefixes=GFX942-BACKOFF %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -mattr=-back-off-barrier -verify-machineinstrs < %s | FileCheck --check-prefixes=GFX9-NO-BACKOFF %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1010 -verify-machineinstrs < %s | FileCheck --check-prefixes=GFX10-BACKOFF %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1100 -verify-machineinstrs < %s | FileCheck --check-prefixes=GFX11-BACKOFF %s
; Subtargets must wait for outstanding memory instructions before a barrier if
; they cannot back off of the barrier.
define void @back_off_barrier_no_fence(ptr %in, ptr %out) #0 {
; GFX9-NO-BACKOFF-LABEL: back_off_barrier_no_fence:
; GFX9-NO-BACKOFF: ; %bb.0:
; GFX9-NO-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX9-NO-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX9-NO-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-NO-BACKOFF-NEXT: s_barrier
; GFX9-NO-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX9-NO-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-NO-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX9-BACKOFF-LABEL: back_off_barrier_no_fence:
; GFX9-BACKOFF: ; %bb.0:
; GFX9-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX9-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX9-BACKOFF-NEXT: s_barrier
; GFX9-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX9-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX942-BACKOFF-LABEL: back_off_barrier_no_fence:
; GFX942-BACKOFF: ; %bb.0:
; GFX942-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX942-BACKOFF-NEXT: s_barrier
; GFX942-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX942-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX942-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX942-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-BACKOFF-LABEL: back_off_barrier_no_fence:
; GFX10-BACKOFF: ; %bb.0:
; GFX10-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX10-BACKOFF-NEXT: s_barrier
; GFX10-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX10-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX10-BACKOFF-NEXT: s_waitcnt lgkmcnt(0)
; GFX10-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX11-BACKOFF-LABEL: back_off_barrier_no_fence:
; GFX11-BACKOFF: ; %bb.0:
; GFX11-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX11-BACKOFF-NEXT: flat_load_b32 v0, v[0:1]
; GFX11-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX11-BACKOFF-NEXT: s_waitcnt_vscnt null, 0x0
; GFX11-BACKOFF-NEXT: s_barrier
; GFX11-BACKOFF-NEXT: flat_store_b32 v[2:3], v0
; GFX11-BACKOFF-NEXT: s_waitcnt lgkmcnt(0)
; GFX11-BACKOFF-NEXT: s_setpc_b64 s[30:31]
%load = load i32, ptr %in
call void @llvm.amdgcn.s.barrier()
store i32 %load, ptr %out
ret void
}
define void @back_off_barrier_with_fence(ptr %in, ptr %out) #0 {
; GFX9-NO-BACKOFF-LABEL: back_off_barrier_with_fence:
; GFX9-NO-BACKOFF: ; %bb.0:
; GFX9-NO-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX9-NO-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX9-NO-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-NO-BACKOFF-NEXT: s_barrier
; GFX9-NO-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX9-NO-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-NO-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX9-BACKOFF-LABEL: back_off_barrier_with_fence:
; GFX9-BACKOFF: ; %bb.0:
; GFX9-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX9-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX9-BACKOFF-NEXT: s_waitcnt lgkmcnt(0)
; GFX9-BACKOFF-NEXT: s_barrier
; GFX9-BACKOFF-NEXT: s_waitcnt vmcnt(0)
; GFX9-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX9-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX9-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX942-BACKOFF-LABEL: back_off_barrier_with_fence:
; GFX942-BACKOFF: ; %bb.0:
; GFX942-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX942-BACKOFF-NEXT: s_waitcnt lgkmcnt(0)
; GFX942-BACKOFF-NEXT: s_barrier
; GFX942-BACKOFF-NEXT: s_waitcnt vmcnt(0)
; GFX942-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX942-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX942-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-BACKOFF-LABEL: back_off_barrier_with_fence:
; GFX10-BACKOFF: ; %bb.0:
; GFX10-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-BACKOFF-NEXT: flat_load_dword v0, v[0:1]
; GFX10-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX10-BACKOFF-NEXT: s_waitcnt_vscnt null, 0x0
; GFX10-BACKOFF-NEXT: s_barrier
; GFX10-BACKOFF-NEXT: buffer_gl0_inv
; GFX10-BACKOFF-NEXT: flat_store_dword v[2:3], v0
; GFX10-BACKOFF-NEXT: s_waitcnt lgkmcnt(0)
; GFX10-BACKOFF-NEXT: s_setpc_b64 s[30:31]
;
; GFX11-BACKOFF-LABEL: back_off_barrier_with_fence:
; GFX11-BACKOFF: ; %bb.0:
; GFX11-BACKOFF-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX11-BACKOFF-NEXT: flat_load_b32 v0, v[0:1]
; GFX11-BACKOFF-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX11-BACKOFF-NEXT: s_waitcnt_vscnt null, 0x0
; GFX11-BACKOFF-NEXT: s_barrier
; GFX11-BACKOFF-NEXT: buffer_gl0_inv
; GFX11-BACKOFF-NEXT: flat_store_b32 v[2:3], v0
; GFX11-BACKOFF-NEXT: s_waitcnt lgkmcnt(0)
; GFX11-BACKOFF-NEXT: s_setpc_b64 s[30:31]
%load = load i32, ptr %in
fence syncscope("workgroup") release
call void @llvm.amdgcn.s.barrier()
fence syncscope("workgroup") acquire
store i32 %load, ptr %out
ret void
}
declare void @llvm.amdgcn.s.barrier()
attributes #0 = { nounwind }
|
