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1# RUN: llc -o - %s -march=amdgcn -mcpu=fiji -run-pass=si-insert-waitcnts -verify-machineinstrs | FileCheck -check-prefix=GCN %s
2
3# GCN-LABEL: waitcnt-back-edge-loop
4# GCN: bb.2
5# GCN: S_WAITCNT 112
6# GCN: $vgpr5 = V_CVT_I32_F32_e32 killed $vgpr5, implicit $exec
7
8---
9name: waitcnt-back-edge-loop
10body:             |
11  bb.0:
12    successors: %bb.1
13
14    $vgpr1 = V_MOV_B32_e32 0, implicit $exec, implicit-def $vgpr1_vgpr2
15    $vgpr2 = V_MOV_B32_e32 0, implicit $exec, implicit-def $vgpr1_vgpr2
16    $vgpr4 = FLAT_LOAD_DWORD $vgpr1_vgpr2, 0, 0, 0, implicit $exec, implicit $flat_scr :: (volatile load 4 from `float addrspace(1)* null`, addrspace 1)
17    $vgpr0 = FLAT_LOAD_DWORD $vgpr1_vgpr2, 0, 0, 0, implicit $exec, implicit $flat_scr :: (volatile load 4 from `float addrspace(1)* null`, addrspace 1)
18    $sgpr0_sgpr1 = V_CMP_EQ_U32_e64 3, killed $sgpr4, implicit $exec
19    $vgpr3 = V_CNDMASK_B32_e64 -1082130432, 1065353216, killed $sgpr0_sgpr1, implicit $exec
20    $vgpr5 = V_MOV_B32_e32 $vgpr0, implicit $exec, implicit $exec
21    S_BRANCH %bb.1
22
23  bb.3:
24    successors: %bb.1
25
26    $vgpr5 = FLAT_LOAD_DWORD $vgpr1_vgpr2, 0, 0, 0, implicit $exec, implicit $flat_scr :: (volatile load 4 from `float addrspace(1)* null`, addrspace 1)
27
28  bb.1:
29    successors: %bb.5, %bb.2
30
31    $vgpr5 = V_CVT_I32_F32_e32 killed $vgpr5, implicit $exec
32    V_CMP_NE_U32_e32 0, $vgpr5, implicit-def $vcc, implicit $exec
33    $vcc = S_AND_B64 $exec, killed $vcc, implicit-def dead $scc
34    S_CBRANCH_VCCZ %bb.5, implicit killed $vcc
35
36  bb.2:
37    successors: %bb.4, %bb.3
38
39    V_CMP_EQ_U32_e32 9, killed $vgpr5, implicit-def $vcc, implicit $exec
40    $vcc = S_AND_B64 $exec, killed $vcc, implicit-def dead $scc
41    S_CBRANCH_VCCZ %bb.3, implicit killed $vcc
42
43  bb.4:
44    successors: %bb.3, %bb.1
45
46    $vgpr5 = FLAT_LOAD_DWORD $vgpr1_vgpr2, 0, 0, 0, implicit $exec, implicit $flat_scr :: (volatile load 4 from `float addrspace(1)* null`, addrspace 1)
47    $vgpr4 = V_CVT_I32_F32_e32 $vgpr5, implicit $exec
48    V_CMP_EQ_U32_e32 2, killed $vgpr4, implicit-def $vcc, implicit $exec
49    $vcc = S_AND_B64 $exec, killed $vcc, implicit-def dead $scc
50    $vgpr4 = V_MOV_B32_e32 $vgpr5, implicit $exec, implicit $exec
51    S_CBRANCH_VCCZ %bb.1, implicit killed $vcc
52    S_BRANCH %bb.3
53
54  bb.5:
55
56    $vgpr4 = V_MAC_F32_e32 killed $vgpr0, killed $vgpr3, killed $vgpr4, implicit $exec
57    EXP_DONE 12, killed $vgpr4, undef $vgpr0, undef $vgpr0, undef $vgpr0, 0, 0, 15, implicit $exec
58    S_ENDPGM
59...
60---
61
62# GCN-LABEL: name: waitcnt-multiple-back-edges{{$}}
63# GCN: bb.0:
64# GCN: S_WAITCNT 0
65# GCN-NEXT: S_BRANCH %bb.2
66
67name: waitcnt-multiple-back-edges
68body: |
69  bb.0:
70    S_BRANCH %bb.2
71
72  bb.1:
73    S_BRANCH %bb.2
74
75  bb.2:
76    S_CBRANCH_VCCZ %bb.1, implicit $vcc
77
78  bb.3:
79    S_CBRANCH_VCCNZ %bb.5, implicit $vcc
80
81  bb.4:
82    BUFFER_ATOMIC_ADD_OFFSET renamable $vgpr0, renamable $sgpr12_sgpr13_sgpr14_sgpr15, 0, 4, 0, implicit $exec
83    S_CBRANCH_SCC0 %bb.2, implicit $scc
84    S_BRANCH %bb.6
85
86  bb.5:
87    S_CBRANCH_SCC0 %bb.2, implicit $scc
88    S_BRANCH %bb.6
89
90  bb.6:
91    S_CBRANCH_SCC1 %bb.0, implicit $scc
92    S_ENDPGM
93...
94