1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -passes=dfa-jump-threading %s | FileCheck %s
4 ; These tests check if selects are unfolded properly for jump threading
5 ; opportunities. There are three different patterns to consider:
6 ; 1) Both operands are constant and the false branch is unfolded by default
7 ; 2) One operand is constant and the other is another select to be unfolded. In
8 ; this case a single select is sunk to a new block to unfold.
9 ; 3) Both operands are a select, and both should be sunk to new blocks.
10 define i32 @test1(i32 %num) {
11 ; CHECK-LABEL: @test1(
13 ; CHECK-NEXT: br label [[FOR_BODY:%.*]]
15 ; CHECK-NEXT: [[COUNT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
16 ; CHECK-NEXT: [[STATE:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ poison, [[FOR_INC]] ]
17 ; CHECK-NEXT: switch i32 [[STATE]], label [[FOR_INC_JT1:%.*]] [
18 ; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
19 ; CHECK-NEXT: i32 2, label [[CASE2:%.*]]
21 ; CHECK: for.body.jt2:
22 ; CHECK-NEXT: [[COUNT_JT2:%.*]] = phi i32 [ [[INC_JT2:%.*]], [[FOR_INC_JT2:%.*]] ]
23 ; CHECK-NEXT: [[STATE_JT2:%.*]] = phi i32 [ [[STATE_NEXT_JT2:%.*]], [[FOR_INC_JT2]] ]
24 ; CHECK-NEXT: br label [[CASE2]]
25 ; CHECK: for.body.jt1:
26 ; CHECK-NEXT: [[COUNT_JT1:%.*]] = phi i32 [ [[INC_JT1:%.*]], [[FOR_INC_JT1]] ]
27 ; CHECK-NEXT: [[STATE_JT1:%.*]] = phi i32 [ [[STATE_NEXT_JT1:%.*]], [[FOR_INC_JT1]] ]
28 ; CHECK-NEXT: br label [[CASE1]]
30 ; CHECK-NEXT: [[COUNT2:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
31 ; CHECK-NEXT: br label [[FOR_INC_JT2]]
33 ; CHECK-NEXT: [[COUNT1:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
34 ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[COUNT1]], 50
35 ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE:%.*]]
36 ; CHECK: si.unfold.false:
37 ; CHECK-NEXT: br label [[FOR_INC_JT2]]
39 ; CHECK-NEXT: [[INC]] = add nsw i32 undef, 1
40 ; CHECK-NEXT: [[CMP_EXIT:%.*]] = icmp slt i32 [[INC]], [[NUM:%.*]]
41 ; CHECK-NEXT: br i1 [[CMP_EXIT]], label [[FOR_BODY]], label [[FOR_END:%.*]]
43 ; CHECK-NEXT: [[COUNT4:%.*]] = phi i32 [ [[COUNT1]], [[SI_UNFOLD_FALSE]] ], [ [[COUNT2]], [[CASE1]] ]
44 ; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[CASE1]] ], [ 2, [[SI_UNFOLD_FALSE]] ]
45 ; CHECK-NEXT: [[INC_JT2]] = add nsw i32 [[COUNT4]], 1
46 ; CHECK-NEXT: [[CMP_EXIT_JT2:%.*]] = icmp slt i32 [[INC_JT2]], [[NUM]]
47 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT2]], label [[FOR_BODY_JT2]], label [[FOR_END]]
49 ; CHECK-NEXT: [[COUNT3:%.*]] = phi i32 [ [[COUNT1]], [[CASE2]] ], [ [[COUNT]], [[FOR_BODY]] ]
50 ; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[CASE2]] ], [ 1, [[FOR_BODY]] ]
51 ; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT3]], 1
52 ; CHECK-NEXT: [[CMP_EXIT_JT1:%.*]] = icmp slt i32 [[INC_JT1]], [[NUM]]
53 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT1]], label [[FOR_BODY_JT1]], label [[FOR_END]]
55 ; CHECK-NEXT: ret i32 0
61 %count = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
62 %state = phi i32 [ 1, %entry ], [ %state.next, %for.inc ]
63 switch i32 %state, label %for.inc [
72 %cmp = icmp slt i32 %count, 50
73 %sel = select i1 %cmp, i32 1, i32 2
77 %state.next = phi i32 [ %sel, %case2 ], [ 1, %for.body ], [ 2, %case1 ]
78 %inc = add nsw i32 %count, 1
79 %cmp.exit = icmp slt i32 %inc, %num
80 br i1 %cmp.exit, label %for.body, label %for.end
86 define i32 @test2(i32 %num) {
87 ; CHECK-LABEL: @test2(
89 ; CHECK-NEXT: br label [[FOR_BODY:%.*]]
91 ; CHECK-NEXT: [[COUNT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
92 ; CHECK-NEXT: [[STATE:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ poison, [[FOR_INC]] ]
93 ; CHECK-NEXT: switch i32 [[STATE]], label [[FOR_INC_JT1:%.*]] [
94 ; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
95 ; CHECK-NEXT: i32 2, label [[CASE2:%.*]]
97 ; CHECK: for.body.jt3:
98 ; CHECK-NEXT: [[COUNT_JT3:%.*]] = phi i32 [ [[INC_JT3:%.*]], [[FOR_INC_JT3:%.*]] ]
99 ; CHECK-NEXT: [[STATE_JT3:%.*]] = phi i32 [ [[STATE_NEXT_JT3:%.*]], [[FOR_INC_JT3]] ]
100 ; CHECK-NEXT: br label [[FOR_INC_JT1]]
101 ; CHECK: for.body.jt2:
102 ; CHECK-NEXT: [[COUNT_JT2:%.*]] = phi i32 [ [[INC_JT2:%.*]], [[FOR_INC_JT2:%.*]] ]
103 ; CHECK-NEXT: [[STATE_JT2:%.*]] = phi i32 [ [[STATE_NEXT_JT2:%.*]], [[FOR_INC_JT2]] ]
104 ; CHECK-NEXT: br label [[CASE2]]
105 ; CHECK: for.body.jt1:
106 ; CHECK-NEXT: [[COUNT_JT1:%.*]] = phi i32 [ [[INC_JT1:%.*]], [[FOR_INC_JT1]] ]
107 ; CHECK-NEXT: [[STATE_JT1:%.*]] = phi i32 [ [[STATE_NEXT_JT1:%.*]], [[FOR_INC_JT1]] ]
108 ; CHECK-NEXT: br label [[CASE1]]
110 ; CHECK-NEXT: [[COUNT5:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
111 ; CHECK-NEXT: [[CMP_C1:%.*]] = icmp slt i32 [[COUNT5]], 50
112 ; CHECK-NEXT: [[CMP2_C1:%.*]] = icmp slt i32 [[COUNT5]], 100
113 ; CHECK-NEXT: br i1 [[CMP2_C1]], label [[SI_UNFOLD_TRUE:%.*]], label [[FOR_INC_JT3]]
115 ; CHECK-NEXT: [[COUNT3:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
116 ; CHECK-NEXT: [[CMP_C2:%.*]] = icmp slt i32 [[COUNT3]], 50
117 ; CHECK-NEXT: [[CMP2_C2:%.*]] = icmp sgt i32 [[COUNT3]], 100
118 ; CHECK-NEXT: br i1 [[CMP2_C2]], label [[FOR_INC_JT3]], label [[SI_UNFOLD_FALSE:%.*]]
119 ; CHECK: si.unfold.false:
120 ; CHECK-NEXT: br i1 [[CMP_C2]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE1:%.*]]
121 ; CHECK: si.unfold.false1:
122 ; CHECK-NEXT: br label [[FOR_INC_JT2]]
123 ; CHECK: si.unfold.true:
124 ; CHECK-NEXT: br i1 [[CMP_C1]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE2:%.*]]
125 ; CHECK: si.unfold.false2:
126 ; CHECK-NEXT: br label [[FOR_INC_JT2]]
128 ; CHECK-NEXT: [[INC]] = add nsw i32 undef, 1
129 ; CHECK-NEXT: [[CMP_EXIT:%.*]] = icmp slt i32 [[INC]], [[NUM:%.*]]
130 ; CHECK-NEXT: br i1 [[CMP_EXIT]], label [[FOR_BODY]], label [[FOR_END:%.*]]
131 ; CHECK: for.inc.jt3:
132 ; CHECK-NEXT: [[COUNT6:%.*]] = phi i32 [ [[COUNT3]], [[CASE2]] ], [ [[COUNT5]], [[CASE1]] ]
133 ; CHECK-NEXT: [[STATE_NEXT_JT3]] = phi i32 [ 3, [[CASE1]] ], [ 3, [[CASE2]] ]
134 ; CHECK-NEXT: [[INC_JT3]] = add nsw i32 [[COUNT6]], 1
135 ; CHECK-NEXT: [[CMP_EXIT_JT3:%.*]] = icmp slt i32 [[INC_JT3]], [[NUM]]
136 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT3]], label [[FOR_BODY_JT3:%.*]], label [[FOR_END]]
137 ; CHECK: for.inc.jt2:
138 ; CHECK-NEXT: [[COUNT7:%.*]] = phi i32 [ [[COUNT3]], [[SI_UNFOLD_FALSE1]] ], [ [[COUNT5]], [[SI_UNFOLD_FALSE2]] ]
139 ; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[SI_UNFOLD_FALSE1]] ], [ 2, [[SI_UNFOLD_FALSE2]] ]
140 ; CHECK-NEXT: [[INC_JT2]] = add nsw i32 [[COUNT7]], 1
141 ; CHECK-NEXT: [[CMP_EXIT_JT2:%.*]] = icmp slt i32 [[INC_JT2]], [[NUM]]
142 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT2]], label [[FOR_BODY_JT2]], label [[FOR_END]]
143 ; CHECK: for.inc.jt1:
144 ; CHECK-NEXT: [[COUNT4:%.*]] = phi i32 [ [[COUNT_JT3]], [[FOR_BODY_JT3]] ], [ [[COUNT3]], [[SI_UNFOLD_FALSE]] ], [ [[COUNT5]], [[SI_UNFOLD_TRUE]] ], [ [[COUNT]], [[FOR_BODY]] ]
145 ; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[FOR_BODY]] ], [ 1, [[SI_UNFOLD_FALSE]] ], [ 1, [[SI_UNFOLD_TRUE]] ], [ 1, [[FOR_BODY_JT3]] ]
146 ; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT4]], 1
147 ; CHECK-NEXT: [[CMP_EXIT_JT1:%.*]] = icmp slt i32 [[INC_JT1]], [[NUM]]
148 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT1]], label [[FOR_BODY_JT1]], label [[FOR_END]]
150 ; CHECK-NEXT: ret i32 0
156 %count = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
157 %state = phi i32 [ 1, %entry ], [ %state.next, %for.inc ]
158 switch i32 %state, label %for.inc [
164 %cmp.c1 = icmp slt i32 %count, 50
165 %cmp2.c1 = icmp slt i32 %count, 100
166 %state1.1 = select i1 %cmp.c1, i32 1, i32 2
167 %state1.2 = select i1 %cmp2.c1, i32 %state1.1, i32 3
171 %cmp.c2 = icmp slt i32 %count, 50
172 %cmp2.c2 = icmp sgt i32 %count, 100
173 %state2.1 = select i1 %cmp.c2, i32 1, i32 2
174 %state2.2 = select i1 %cmp2.c2, i32 3, i32 %state2.1
178 %state.next = phi i32 [ %state1.2, %case1 ], [ %state2.2, %case2 ], [ 1, %for.body ]
179 %inc = add nsw i32 %count, 1
180 %cmp.exit = icmp slt i32 %inc, %num
181 br i1 %cmp.exit, label %for.body, label %for.end
187 define i32 @test3(i32 %num) {
188 ; CHECK-LABEL: @test3(
190 ; CHECK-NEXT: br label [[FOR_BODY:%.*]]
192 ; CHECK-NEXT: [[COUNT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
193 ; CHECK-NEXT: [[STATE:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ poison, [[FOR_INC]] ]
194 ; CHECK-NEXT: switch i32 [[STATE]], label [[FOR_INC_JT1:%.*]] [
195 ; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
196 ; CHECK-NEXT: i32 2, label [[CASE2:%.*]]
198 ; CHECK: for.body.jt4:
199 ; CHECK-NEXT: [[COUNT_JT4:%.*]] = phi i32 [ [[INC_JT4:%.*]], [[FOR_INC_JT4:%.*]] ]
200 ; CHECK-NEXT: [[STATE_JT4:%.*]] = phi i32 [ [[STATE_NEXT_JT4:%.*]], [[FOR_INC_JT4]] ]
201 ; CHECK-NEXT: br label [[FOR_INC_JT1]]
202 ; CHECK: for.body.jt3:
203 ; CHECK-NEXT: [[COUNT_JT3:%.*]] = phi i32 [ [[INC_JT3:%.*]], [[FOR_INC_JT3:%.*]] ]
204 ; CHECK-NEXT: [[STATE_JT3:%.*]] = phi i32 [ [[STATE_NEXT_JT3:%.*]], [[FOR_INC_JT3]] ]
205 ; CHECK-NEXT: br label [[FOR_INC_JT1]]
206 ; CHECK: for.body.jt2:
207 ; CHECK-NEXT: [[COUNT_JT2:%.*]] = phi i32 [ [[INC_JT2:%.*]], [[FOR_INC_JT2:%.*]] ]
208 ; CHECK-NEXT: [[STATE_JT2:%.*]] = phi i32 [ [[STATE_NEXT_JT2:%.*]], [[FOR_INC_JT2]] ]
209 ; CHECK-NEXT: br label [[CASE2]]
210 ; CHECK: for.body.jt1:
211 ; CHECK-NEXT: [[COUNT_JT1:%.*]] = phi i32 [ [[INC_JT1:%.*]], [[FOR_INC_JT1]] ]
212 ; CHECK-NEXT: [[STATE_JT1:%.*]] = phi i32 [ [[STATE_NEXT_JT1:%.*]], [[FOR_INC_JT1]] ]
213 ; CHECK-NEXT: br label [[CASE1]]
215 ; CHECK-NEXT: [[COUNT5:%.*]] = phi i32 [ [[COUNT_JT1]], [[FOR_BODY_JT1:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
216 ; CHECK-NEXT: br label [[FOR_INC_JT2]]
218 ; CHECK-NEXT: [[COUNT4:%.*]] = phi i32 [ [[COUNT_JT2]], [[FOR_BODY_JT2:%.*]] ], [ [[COUNT]], [[FOR_BODY]] ]
219 ; CHECK-NEXT: [[CMP_1:%.*]] = icmp slt i32 [[COUNT4]], 50
220 ; CHECK-NEXT: [[CMP_2:%.*]] = icmp slt i32 [[COUNT4]], 100
221 ; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[COUNT4]], 1
222 ; CHECK-NEXT: [[CMP_3:%.*]] = icmp eq i32 [[TMP0]], 0
223 ; CHECK-NEXT: br i1 [[CMP_3]], label [[SI_UNFOLD_TRUE:%.*]], label [[SI_UNFOLD_FALSE:%.*]]
224 ; CHECK: si.unfold.true:
225 ; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_INC_JT1]], label [[SI_UNFOLD_FALSE2:%.*]]
226 ; CHECK: si.unfold.false:
227 ; CHECK-NEXT: br i1 [[CMP_2]], label [[FOR_INC_JT3]], label [[SI_UNFOLD_FALSE1:%.*]]
228 ; CHECK: si.unfold.false1:
229 ; CHECK-NEXT: br label [[FOR_INC_JT4]]
230 ; CHECK: si.unfold.false2:
231 ; CHECK-NEXT: br label [[FOR_INC_JT2]]
233 ; CHECK-NEXT: [[INC]] = add nsw i32 undef, 1
234 ; CHECK-NEXT: [[CMP_EXIT:%.*]] = icmp slt i32 [[INC]], [[NUM:%.*]]
235 ; CHECK-NEXT: br i1 [[CMP_EXIT]], label [[FOR_BODY]], label [[FOR_END:%.*]]
236 ; CHECK: for.inc.jt4:
237 ; CHECK-NEXT: [[STATE_NEXT_JT4]] = phi i32 [ 4, [[SI_UNFOLD_FALSE1]] ]
238 ; CHECK-NEXT: [[INC_JT4]] = add nsw i32 [[COUNT4]], 1
239 ; CHECK-NEXT: [[CMP_EXIT_JT4:%.*]] = icmp slt i32 [[INC_JT4]], [[NUM]]
240 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT4]], label [[FOR_BODY_JT4:%.*]], label [[FOR_END]]
241 ; CHECK: for.inc.jt3:
242 ; CHECK-NEXT: [[STATE_NEXT_JT3]] = phi i32 [ 3, [[SI_UNFOLD_FALSE]] ]
243 ; CHECK-NEXT: [[INC_JT3]] = add nsw i32 [[COUNT4]], 1
244 ; CHECK-NEXT: [[CMP_EXIT_JT3:%.*]] = icmp slt i32 [[INC_JT3]], [[NUM]]
245 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT3]], label [[FOR_BODY_JT3:%.*]], label [[FOR_END]]
246 ; CHECK: for.inc.jt2:
247 ; CHECK-NEXT: [[COUNT6:%.*]] = phi i32 [ [[COUNT4]], [[SI_UNFOLD_FALSE2]] ], [ [[COUNT5]], [[CASE1]] ]
248 ; CHECK-NEXT: [[STATE_NEXT_JT2]] = phi i32 [ 2, [[CASE1]] ], [ 2, [[SI_UNFOLD_FALSE2]] ]
249 ; CHECK-NEXT: [[INC_JT2]] = add nsw i32 [[COUNT6]], 1
250 ; CHECK-NEXT: [[CMP_EXIT_JT2:%.*]] = icmp slt i32 [[INC_JT2]], [[NUM]]
251 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT2]], label [[FOR_BODY_JT2]], label [[FOR_END]]
252 ; CHECK: for.inc.jt1:
253 ; CHECK-NEXT: [[COUNT3:%.*]] = phi i32 [ [[COUNT_JT4]], [[FOR_BODY_JT4]] ], [ [[COUNT_JT3]], [[FOR_BODY_JT3]] ], [ [[COUNT4]], [[SI_UNFOLD_TRUE]] ], [ [[COUNT]], [[FOR_BODY]] ]
254 ; CHECK-NEXT: [[STATE_NEXT_JT1]] = phi i32 [ 1, [[FOR_BODY]] ], [ 1, [[SI_UNFOLD_TRUE]] ], [ 1, [[FOR_BODY_JT3]] ], [ 1, [[FOR_BODY_JT4]] ]
255 ; CHECK-NEXT: [[INC_JT1]] = add nsw i32 [[COUNT3]], 1
256 ; CHECK-NEXT: [[CMP_EXIT_JT1:%.*]] = icmp slt i32 [[INC_JT1]], [[NUM]]
257 ; CHECK-NEXT: br i1 [[CMP_EXIT_JT1]], label [[FOR_BODY_JT1]], label [[FOR_END]]
259 ; CHECK-NEXT: ret i32 0
265 %count = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
266 %state = phi i32 [ 1, %entry ], [ %state.next, %for.inc ]
267 switch i32 %state, label %for.inc [
276 %cmp.1 = icmp slt i32 %count, 50
277 %cmp.2 = icmp slt i32 %count, 100
278 %0 = and i32 %count, 1
279 %cmp.3 = icmp eq i32 %0, 0
280 %sel.1 = select i1 %cmp.1, i32 1, i32 2
281 %sel.2 = select i1 %cmp.2, i32 3, i32 4
282 %sel.3 = select i1 %cmp.3, i32 %sel.1, i32 %sel.2
286 %state.next = phi i32 [ %sel.3, %case2 ], [ 1, %for.body ], [ 2, %case1 ]
287 %inc = add nsw i32 %count, 1
288 %cmp.exit = icmp slt i32 %inc, %num
289 br i1 %cmp.exit, label %for.body, label %for.end
295 define void @select_coming_elsewhere(i1 %cond, i16 %a, i16 %b) {
296 ; CHECK-LABEL: @select_coming_elsewhere(
298 ; CHECK-NEXT: [[DIV:%.*]] = select i1 [[COND:%.*]], i16 [[A:%.*]], i16 [[B:%.*]]
299 ; CHECK-NEXT: br label [[FOR_COND:%.*]]
301 ; CHECK-NEXT: [[E_ADDR_0:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[DIV]], [[LOR_END:%.*]] ]
302 ; CHECK-NEXT: switch i16 [[E_ADDR_0]], label [[LOR_END]] [
305 ; CHECK-NEXT: br label [[FOR_COND]]
308 %div = select i1 %cond, i16 %a, i16 %b
311 for.cond: ; preds = %lor.end, %entry
312 %e.addr.0 = phi i16 [ 0, %entry ], [ %div, %lor.end ]
313 switch i16 %e.addr.0, label %lor.end [
316 lor.end: ; preds = %for.cond
320 define void @pr65222(i32 %flags, i1 %cmp, i1 %tobool.not) {
321 ; CHECK-LABEL: @pr65222(
323 ; CHECK-NEXT: br label [[WHILE_COND:%.*]]
325 ; CHECK-NEXT: br i1 [[CMP:%.*]], label [[THEN:%.*]], label [[IF_END:%.*]]
327 ; CHECK-NEXT: br i1 [[TOBOOL_NOT:%.*]], label [[SI_UNFOLD_TRUE:%.*]], label [[SI_UNFOLD_FALSE:%.*]]
328 ; CHECK: si.unfold.true:
329 ; CHECK-NEXT: br i1 [[CMP]], label [[IF_END]], label [[SI_UNFOLD_FALSE2:%.*]]
330 ; CHECK: si.unfold.false:
331 ; CHECK-NEXT: br i1 [[CMP]], label [[IF_END]], label [[SI_UNFOLD_FALSE1:%.*]]
332 ; CHECK: si.unfold.false1:
333 ; CHECK-NEXT: br label [[IF_END]]
334 ; CHECK: si.unfold.false2:
335 ; CHECK-NEXT: br label [[IF_END]]
337 ; CHECK-NEXT: [[UNFOLDED:%.*]] = phi i32 [ [[FLAGS:%.*]], [[WHILE_COND]] ], [ 3, [[SI_UNFOLD_TRUE]] ], [ 2, [[SI_UNFOLD_FALSE]] ], [ 0, [[SI_UNFOLD_FALSE1]] ], [ 1, [[SI_UNFOLD_FALSE2]] ]
338 ; CHECK-NEXT: [[OTHER:%.*]] = phi i32 [ [[FLAGS]], [[WHILE_COND]] ], [ 0, [[SI_UNFOLD_TRUE]] ], [ 0, [[SI_UNFOLD_FALSE]] ], [ 0, [[SI_UNFOLD_FALSE1]] ], [ 0, [[SI_UNFOLD_FALSE2]] ]
339 ; CHECK-NEXT: switch i32 [[UNFOLDED]], label [[UNREACHABLE:%.*]] [
340 ; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
342 ; CHECK: unreachable:
343 ; CHECK-NEXT: unreachable
345 ; CHECK-NEXT: br label [[WHILE_COND]]
350 while.cond: ; preds = %sw.bb147, %if.end, %entry
351 br i1 %cmp, label %then, label %if.end
353 then: ; preds = %while.cond
354 %cond = select i1 %cmp, i32 2, i32 0
355 %cond1 = select i1 %cmp, i32 3, i32 1
356 %tounfold = select i1 %tobool.not, i32 %cond1, i32 %cond
359 if.end: ; preds = %then, %while.cond
360 %unfolded = phi i32 [ %tounfold, %then ], [ %flags, %while.cond ]
361 %other = phi i32 [ 0, %then ], [ %flags, %while.cond ]
362 switch i32 %unfolded, label %unreachable [
369 sw.bb: ; preds = %if.end