1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
3 ; RUN: llc -mtriple=amdgcn-amd-amdhsa -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s
4 ; RUN: opt -mtriple=amdgcn-amd-amdhsa -lowerswitch -amdgpu-unify-divergent-exit-nodes -verify -structurizecfg -verify -si-annotate-control-flow -verify -S %s -o - | FileCheck -check-prefix=IR %s
6 ; A test with a divergent unreachable block and uniform return block. The
7 ; compiler needs to create a regions that includes them so that
8 ; StructurizeCFG correctly transform the CFG, and then SI Annotate Control
9 ; Flow does not fail during annotation.
11 define void @my_func(i32 %0) {
14 ; IR-NEXT: [[TMP1:%.*]] = load i32, ptr addrspace(4) null, align 8
15 ; IR-NEXT: br label [[NODEBLOCK:%.*]]
17 ; IR-NEXT: [[PIVOT:%.*]] = icmp sge i32 [[TMP1]], 1
18 ; IR-NEXT: br i1 [[PIVOT]], label [[LEAFBLOCK1:%.*]], label [[FLOW:%.*]]
20 ; IR-NEXT: [[SWITCHLEAF2:%.*]] = icmp ne i32 [[TMP1]], 1
21 ; IR-NEXT: br label [[FLOW]]
23 ; IR-NEXT: [[TMP2:%.*]] = phi i1 [ [[SWITCHLEAF2]], [[LEAFBLOCK1]] ], [ false, [[NODEBLOCK]] ]
24 ; IR-NEXT: [[TMP3:%.*]] = phi i1 [ false, [[LEAFBLOCK1]] ], [ true, [[NODEBLOCK]] ]
25 ; IR-NEXT: br i1 [[TMP3]], label [[LEAFBLOCK:%.*]], label [[FLOW11:%.*]]
27 ; IR-NEXT: [[SWITCHLEAF:%.*]] = icmp eq i32 [[TMP1]], 0
28 ; IR-NEXT: br i1 [[SWITCHLEAF]], label [[SW_BB2:%.*]], label [[FLOW12:%.*]]
30 ; IR-NEXT: [[TMP4:%.*]] = phi i1 [ [[TMP9:%.*]], [[FLOW12]] ], [ false, [[FLOW]] ]
31 ; IR-NEXT: [[TMP5:%.*]] = phi i1 [ [[TMP10:%.*]], [[FLOW12]] ], [ [[TMP2]], [[FLOW]] ]
32 ; IR-NEXT: [[TMP6:%.*]] = call { i1, i64 } @llvm.amdgcn.if.i64(i1 [[TMP5]])
33 ; IR-NEXT: [[TMP7:%.*]] = extractvalue { i1, i64 } [[TMP6]], 0
34 ; IR-NEXT: [[TMP8:%.*]] = extractvalue { i1, i64 } [[TMP6]], 1
35 ; IR-NEXT: br i1 [[TMP7]], label [[DO_BODY:%.*]], label [[FLOW17:%.*]]
37 ; IR-NEXT: br label [[NODEBLOCK7:%.*]]
39 ; IR-NEXT: [[TMP9]] = phi i1 [ [[TMP24:%.*]], [[FLOW15:%.*]] ], [ false, [[LEAFBLOCK]] ]
40 ; IR-NEXT: [[TMP10]] = phi i1 [ [[TMP25:%.*]], [[FLOW15]] ], [ true, [[LEAFBLOCK]] ]
41 ; IR-NEXT: br label [[FLOW11]]
43 ; IR-NEXT: [[PIVOT8:%.*]] = icmp sge i32 [[TMP0:%.*]], 2
44 ; IR-NEXT: [[TMP11:%.*]] = call { i1, i64 } @llvm.amdgcn.if.i64(i1 [[PIVOT8]])
45 ; IR-NEXT: [[TMP12:%.*]] = extractvalue { i1, i64 } [[TMP11]], 0
46 ; IR-NEXT: [[TMP13:%.*]] = extractvalue { i1, i64 } [[TMP11]], 1
47 ; IR-NEXT: br i1 [[TMP12]], label [[LEAFBLOCK5:%.*]], label [[FLOW13:%.*]]
49 ; IR-NEXT: [[SWITCHLEAF6:%.*]] = icmp eq i32 [[TMP0]], 2
50 ; IR-NEXT: br label [[FLOW13]]
52 ; IR-NEXT: [[TMP14:%.*]] = phi i1 [ true, [[LEAFBLOCK5]] ], [ false, [[NODEBLOCK7]] ]
53 ; IR-NEXT: [[TMP15:%.*]] = phi i1 [ [[SWITCHLEAF6]], [[LEAFBLOCK5]] ], [ false, [[NODEBLOCK7]] ]
54 ; IR-NEXT: [[TMP16:%.*]] = call { i1, i64 } @llvm.amdgcn.else.i64.i64(i64 [[TMP13]])
55 ; IR-NEXT: [[TMP17:%.*]] = extractvalue { i1, i64 } [[TMP16]], 0
56 ; IR-NEXT: [[TMP18:%.*]] = extractvalue { i1, i64 } [[TMP16]], 1
57 ; IR-NEXT: br i1 [[TMP17]], label [[LEAFBLOCK3:%.*]], label [[FLOW14:%.*]]
59 ; IR-NEXT: [[SWITCHLEAF4:%.*]] = icmp eq i32 [[TMP0]], 0
60 ; IR-NEXT: [[SWITCHLEAF4_INV:%.*]] = xor i1 [[SWITCHLEAF4]], true
61 ; IR-NEXT: br label [[FLOW14]]
63 ; IR-NEXT: [[TMP19:%.*]] = phi i1 [ [[SWITCHLEAF4_INV]], [[LEAFBLOCK3]] ], [ [[TMP14]], [[FLOW13]] ]
64 ; IR-NEXT: [[TMP20:%.*]] = phi i1 [ [[SWITCHLEAF4]], [[LEAFBLOCK3]] ], [ [[TMP15]], [[FLOW13]] ]
65 ; IR-NEXT: call void @llvm.amdgcn.end.cf.i64(i64 [[TMP18]])
66 ; IR-NEXT: [[TMP21:%.*]] = call { i1, i64 } @llvm.amdgcn.if.i64(i1 [[TMP20]])
67 ; IR-NEXT: [[TMP22:%.*]] = extractvalue { i1, i64 } [[TMP21]], 0
68 ; IR-NEXT: [[TMP23:%.*]] = extractvalue { i1, i64 } [[TMP21]], 1
69 ; IR-NEXT: br i1 [[TMP22]], label [[LAND_LHS_TRUE_I:%.*]], label [[FLOW15]]
70 ; IR: land.lhs.true.i:
71 ; IR-NEXT: br label [[LEAFBLOCK9:%.*]]
73 ; IR-NEXT: [[TMP24]] = phi i1 [ [[TMP29:%.*]], [[FLOW16:%.*]] ], [ false, [[FLOW14]] ]
74 ; IR-NEXT: [[TMP25]] = phi i1 [ [[TMP30:%.*]], [[FLOW16]] ], [ [[TMP19]], [[FLOW14]] ]
75 ; IR-NEXT: call void @llvm.amdgcn.end.cf.i64(i64 [[TMP23]])
76 ; IR-NEXT: br label [[FLOW12]]
78 ; IR-NEXT: [[SWITCHLEAF10:%.*]] = icmp sgt i32 [[TMP0]], 1
79 ; IR-NEXT: [[TMP26:%.*]] = call { i1, i64 } @llvm.amdgcn.if.i64(i1 [[SWITCHLEAF10]])
80 ; IR-NEXT: [[TMP27:%.*]] = extractvalue { i1, i64 } [[TMP26]], 0
81 ; IR-NEXT: [[TMP28:%.*]] = extractvalue { i1, i64 } [[TMP26]], 1
82 ; IR-NEXT: br i1 [[TMP27]], label [[DO_BODY_I_I_I_I:%.*]], label [[FLOW16]]
83 ; IR: do.body.i.i.i.i:
84 ; IR-NEXT: tail call fastcc void null()
85 ; IR-NEXT: br label [[FLOW16]]
87 ; IR-NEXT: [[TMP29]] = phi i1 [ true, [[DO_BODY_I_I_I_I]] ], [ false, [[LEAFBLOCK9]] ]
88 ; IR-NEXT: [[TMP30]] = phi i1 [ false, [[DO_BODY_I_I_I_I]] ], [ true, [[LEAFBLOCK9]] ]
89 ; IR-NEXT: call void @llvm.amdgcn.end.cf.i64(i64 [[TMP28]])
90 ; IR-NEXT: br label [[FLOW15]]
92 ; IR-NEXT: tail call fastcc void null()
93 ; IR-NEXT: br label [[FLOW17]]
95 ; IR-NEXT: [[TMP31:%.*]] = phi i1 [ true, [[DO_BODY]] ], [ [[TMP4]], [[FLOW11]] ]
96 ; IR-NEXT: call void @llvm.amdgcn.end.cf.i64(i64 [[TMP8]])
97 ; IR-NEXT: [[TMP32:%.*]] = call { i1, i64 } @llvm.amdgcn.if.i64(i1 [[TMP31]])
98 ; IR-NEXT: [[TMP33:%.*]] = extractvalue { i1, i64 } [[TMP32]], 0
99 ; IR-NEXT: [[TMP34:%.*]] = extractvalue { i1, i64 } [[TMP32]], 1
100 ; IR-NEXT: br i1 [[TMP33]], label [[UNIFIEDUNREACHABLEBLOCK:%.*]], label [[UNIFIEDRETURNBLOCK:%.*]]
101 ; IR: UnifiedUnreachableBlock:
102 ; IR-NEXT: call void @llvm.amdgcn.unreachable()
103 ; IR-NEXT: br label [[UNIFIEDRETURNBLOCK]]
104 ; IR: UnifiedReturnBlock:
105 ; IR-NEXT: call void @llvm.amdgcn.end.cf.i64(i64 [[TMP34]])
108 ; GCN-LABEL: my_func:
109 ; GCN: ; %bb.0: ; %entry
110 ; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
111 ; GCN-NEXT: s_mov_b64 s[4:5], 0
112 ; GCN-NEXT: s_load_dword s10, s[4:5], 0x0
113 ; GCN-NEXT: s_mov_b64 s[8:9], -1
114 ; GCN-NEXT: s_waitcnt lgkmcnt(0)
115 ; GCN-NEXT: s_cmp_lt_i32 s10, 1
116 ; GCN-NEXT: s_mov_b64 s[6:7], 0
117 ; GCN-NEXT: s_cbranch_scc1 .LBB0_7
118 ; GCN-NEXT: ; %bb.1: ; %LeafBlock1
119 ; GCN-NEXT: s_cmp_lg_u32 s10, 1
120 ; GCN-NEXT: s_cselect_b64 s[6:7], -1, 0
121 ; GCN-NEXT: s_mov_b64 vcc, exec
122 ; GCN-NEXT: s_cbranch_execz .LBB0_8
123 ; GCN-NEXT: .LBB0_2: ; %Flow11
124 ; GCN-NEXT: s_and_saveexec_b64 s[8:9], s[6:7]
125 ; GCN-NEXT: s_cbranch_execz .LBB0_4
126 ; GCN-NEXT: .LBB0_3: ; %do.body
127 ; GCN-NEXT: s_or_b64 s[4:5], s[4:5], exec
128 ; GCN-NEXT: .LBB0_4: ; %Flow17
129 ; GCN-NEXT: s_or_b64 exec, exec, s[8:9]
130 ; GCN-NEXT: s_and_saveexec_b64 s[6:7], s[4:5]
131 ; GCN-NEXT: s_cbranch_execz .LBB0_6
132 ; GCN-NEXT: ; %bb.5: ; %UnifiedUnreachableBlock
133 ; GCN-NEXT: ; divergent unreachable
134 ; GCN-NEXT: .LBB0_6: ; %UnifiedReturnBlock
135 ; GCN-NEXT: s_or_b64 exec, exec, s[6:7]
136 ; GCN-NEXT: s_setpc_b64 s[30:31]
137 ; GCN-NEXT: .LBB0_7: ; %Flow
138 ; GCN-NEXT: s_andn2_b64 vcc, exec, s[8:9]
139 ; GCN-NEXT: s_cbranch_vccnz .LBB0_2
140 ; GCN-NEXT: .LBB0_8: ; %LeafBlock
141 ; GCN-NEXT: s_cmp_eq_u32 s10, 0
142 ; GCN-NEXT: s_cbranch_scc1 .LBB0_10
144 ; GCN-NEXT: s_mov_b64 s[6:7], -1
145 ; GCN-NEXT: s_and_saveexec_b64 s[8:9], s[6:7]
146 ; GCN-NEXT: s_cbranch_execnz .LBB0_3
147 ; GCN-NEXT: s_branch .LBB0_4
148 ; GCN-NEXT: .LBB0_10: ; %NodeBlock7
149 ; GCN-NEXT: v_cmp_lt_i32_e32 vcc, 1, v0
150 ; GCN-NEXT: s_mov_b64 s[8:9], 0
151 ; GCN-NEXT: s_mov_b64 s[6:7], 0
152 ; GCN-NEXT: s_and_saveexec_b64 s[4:5], vcc
153 ; GCN-NEXT: s_xor_b64 s[4:5], exec, s[4:5]
154 ; GCN-NEXT: s_cbranch_execz .LBB0_12
155 ; GCN-NEXT: ; %bb.11: ; %LeafBlock5
156 ; GCN-NEXT: s_mov_b64 s[6:7], exec
157 ; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 2, v0
158 ; GCN-NEXT: s_and_b64 s[8:9], vcc, exec
159 ; GCN-NEXT: .LBB0_12: ; %Flow13
160 ; GCN-NEXT: s_andn2_saveexec_b64 s[10:11], s[4:5]
161 ; GCN-NEXT: s_cbranch_execz .LBB0_14
162 ; GCN-NEXT: ; %bb.13: ; %LeafBlock3
163 ; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
164 ; GCN-NEXT: v_cmp_ne_u32_e64 s[4:5], 0, v0
165 ; GCN-NEXT: s_andn2_b64 s[6:7], s[6:7], exec
166 ; GCN-NEXT: s_andn2_b64 s[8:9], s[8:9], exec
167 ; GCN-NEXT: s_and_b64 s[4:5], s[4:5], exec
168 ; GCN-NEXT: s_and_b64 s[12:13], vcc, exec
169 ; GCN-NEXT: s_or_b64 s[6:7], s[6:7], s[4:5]
170 ; GCN-NEXT: s_or_b64 s[8:9], s[8:9], s[12:13]
171 ; GCN-NEXT: .LBB0_14: ; %Flow14
172 ; GCN-NEXT: s_or_b64 exec, exec, s[10:11]
173 ; GCN-NEXT: s_mov_b64 s[4:5], 0
174 ; GCN-NEXT: s_and_saveexec_b64 s[10:11], s[8:9]
175 ; GCN-NEXT: s_cbranch_execz .LBB0_18
176 ; GCN-NEXT: ; %bb.15: ; %LeafBlock9
177 ; GCN-NEXT: v_cmp_lt_i32_e32 vcc, 1, v0
178 ; GCN-NEXT: s_mov_b64 s[8:9], -1
179 ; GCN-NEXT: s_and_saveexec_b64 s[12:13], vcc
180 ; GCN-NEXT: s_cbranch_execz .LBB0_17
181 ; GCN-NEXT: ; %bb.16: ; %do.body.i.i.i.i
182 ; GCN-NEXT: s_mov_b64 s[4:5], exec
183 ; GCN-NEXT: s_xor_b64 s[8:9], exec, -1
184 ; GCN-NEXT: .LBB0_17: ; %Flow16
185 ; GCN-NEXT: s_or_b64 exec, exec, s[12:13]
186 ; GCN-NEXT: s_and_b64 s[4:5], s[4:5], exec
187 ; GCN-NEXT: s_andn2_b64 s[6:7], s[6:7], exec
188 ; GCN-NEXT: s_and_b64 s[8:9], s[8:9], exec
189 ; GCN-NEXT: s_or_b64 s[6:7], s[6:7], s[8:9]
190 ; GCN-NEXT: .LBB0_18: ; %Flow15
191 ; GCN-NEXT: s_or_b64 exec, exec, s[10:11]
192 ; GCN-NEXT: s_and_saveexec_b64 s[8:9], s[6:7]
193 ; GCN-NEXT: s_cbranch_execnz .LBB0_3
194 ; GCN-NEXT: s_branch .LBB0_4
196 %1 = load i32, ptr addrspace(4) null, align 8
197 switch i32 %1, label %do.body [
206 switch i32 %0, label %do.body [
207 i32 0, label %land.lhs.true.i
208 i32 2, label %land.lhs.true.i
212 switch i32 %0, label %do.body.i.i.i.i [
213 i32 0, label %do.body
214 i32 1, label %do.body
218 tail call fastcc void null()
222 tail call fastcc void null()