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[SCEV] Regen a test with UTC (#147361)
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‎llvm/test/Analysis/ScalarEvolution/no-wrap-unknown-becount.ll

Lines changed: 152 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -1,19 +1,35 @@
1-
; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
1+
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
2+
; RUN: opt -disable-output -passes='print<scalar-evolution>' %s 2>&1 | FileCheck %s
3+
4+
; Check that assumes/guards guarding the backedge are taken into account
5+
; when inferring no-wrap flags.
26

37
declare void @llvm.experimental.guard(i1, ...)
48
declare void @llvm.assume(i1)
59

610
define void @s_0(i32 %n, ptr %cond) {
7-
; CHECK-LABEL: Classifying expressions for: @s_0
11+
; CHECK-LABEL: 's_0'
12+
; CHECK-NEXT: Classifying expressions for: @s_0
13+
; CHECK-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
14+
; CHECK-NEXT: --> {0,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
15+
; CHECK-NEXT: %iv.inc = add i32 %iv, 1
16+
; CHECK-NEXT: --> {1,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
17+
; CHECK-NEXT: %iv.sext = sext i32 %iv to i64
18+
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-9223372036854775808) S: [0,-9223372036854775808) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
19+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
20+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
21+
; CHECK-NEXT: Determining loop execution counts for: @s_0
22+
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
23+
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
24+
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
25+
;
826
entry:
927
br label %loop
1028

1129
loop:
1230
%iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
1331
%iv.inc = add i32 %iv, 1
1432
%iv.sext = sext i32 %iv to i64
15-
; CHECK: %iv.sext = sext i32 %iv to i64
16-
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop>
1733
%cmp = icmp slt i32 %iv, %n
1834
call void(i1, ...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
1935
%c = load volatile i1, ptr %cond
@@ -24,16 +40,28 @@ leave:
2440
}
2541

2642
define void @s_1(ptr %cond) {
27-
; CHECK-LABEL: Classifying expressions for: @s_1
43+
; CHECK-LABEL: 's_1'
44+
; CHECK-NEXT: Classifying expressions for: @s_1
45+
; CHECK-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
46+
; CHECK-NEXT: --> {0,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
47+
; CHECK-NEXT: %iv.inc = add i32 %iv, 3
48+
; CHECK-NEXT: --> {3,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
49+
; CHECK-NEXT: %iv.sext = sext i32 %iv to i64
50+
; CHECK-NEXT: --> {0,+,3}<nuw><nsw><%loop> U: [0,-9223372036854775808) S: [0,-9223372036854775808) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
51+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
52+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
53+
; CHECK-NEXT: Determining loop execution counts for: @s_1
54+
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
55+
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
56+
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
57+
;
2858
entry:
2959
br label %loop
3060

3161
loop:
3262
%iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
3363
%iv.inc = add i32 %iv, 3
3464
%iv.sext = sext i32 %iv to i64
35-
; CHECK: %iv.sext = sext i32 %iv to i64
36-
; CHECK-NEXT: --> {0,+,3}<nuw><nsw><%loop>
3765
%cmp = icmp slt i32 %iv, 10000
3866
call void(i1, ...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
3967
%c = load volatile i1, ptr %cond
@@ -44,7 +72,21 @@ leave:
4472
}
4573

4674
define void @s_2(ptr %cond) {
47-
; CHECK-LABEL: Classifying expressions for: @s_2
75+
; CHECK-LABEL: 's_2'
76+
; CHECK-NEXT: Classifying expressions for: @s_2
77+
; CHECK-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
78+
; CHECK-NEXT: --> {0,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
79+
; CHECK-NEXT: %iv.inc = add i32 %iv, 3
80+
; CHECK-NEXT: --> {3,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
81+
; CHECK-NEXT: %iv.sext = sext i32 %iv to i64
82+
; CHECK-NEXT: --> {0,+,3}<nuw><nsw><%loop> U: [0,-9223372036854775808) S: [0,-9223372036854775808) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
83+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
84+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
85+
; CHECK-NEXT: Determining loop execution counts for: @s_2
86+
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
87+
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
88+
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
89+
;
4890
entry:
4991
br label %loop
5092

@@ -53,8 +95,6 @@ loop:
5395
%iv.inc = add i32 %iv, 3
5496
%iv.sext = sext i32 %iv to i64
5597
%cmp = icmp slt i32 %iv, 10000
56-
; CHECK: %iv.sext = sext i32 %iv to i64
57-
; CHECK-NEXT: --> {0,+,3}<nuw><nsw><%loop>
5898
call void @llvm.assume(i1 %cmp)
5999
%c = load volatile i1, ptr %cond
60100
br i1 %c, label %loop, label %leave
@@ -64,7 +104,25 @@ leave:
64104
}
65105

66106
define void @s_3(i32 %start, ptr %cond) {
67-
; CHECK-LABEL: Classifying expressions for: @s_3
107+
; CHECK-LABEL: 's_3'
108+
; CHECK-NEXT: Classifying expressions for: @s_3
109+
; CHECK-NEXT: %iv = phi i32 [ %start, %entry ], [ %iv.inc, %be ]
110+
; CHECK-NEXT: --> {%start,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
111+
; CHECK-NEXT: %iv.inc = add i32 %iv, 3
112+
; CHECK-NEXT: --> {(3 + %start),+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
113+
; CHECK-NEXT: %iv.inc.sext = sext i32 %iv.inc to i64
114+
; CHECK-NEXT: --> {(sext i32 (3 + %start) to i64),+,3}<nsw><%loop> U: [-2147483648,4294977296) S: [-2147483648,4294977296) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
115+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
116+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
117+
; CHECK-NEXT: Determining loop execution counts for: @s_3
118+
; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
119+
; CHECK-NEXT: exit count for loop: ((((-1 * (1 umin ((-1 * %start) + (10000 smax %start))))<nuw><nsw> + (-1 * %start) + (10000 smax %start)) /u 3) + (1 umin ((-1 * %start) + (10000 smax %start))))
120+
; CHECK-NEXT: exit count for be: ***COULDNOTCOMPUTE***
121+
; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 715831216
122+
; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((((-1 * (1 umin ((-1 * %start) + (10000 smax %start))))<nuw><nsw> + (-1 * %start) + (10000 smax %start)) /u 3) + (1 umin ((-1 * %start) + (10000 smax %start))))
123+
; CHECK-NEXT: symbolic max exit count for loop: ((((-1 * (1 umin ((-1 * %start) + (10000 smax %start))))<nuw><nsw> + (-1 * %start) + (10000 smax %start)) /u 3) + (1 umin ((-1 * %start) + (10000 smax %start))))
124+
; CHECK-NEXT: symbolic max exit count for be: ***COULDNOTCOMPUTE***
125+
;
68126
entry:
69127
br label %loop
70128

@@ -76,8 +134,6 @@ loop:
76134
be:
77135
%iv.inc = add i32 %iv, 3
78136
%iv.inc.sext = sext i32 %iv.inc to i64
79-
; CHECK: %iv.inc.sext = sext i32 %iv.inc to i64
80-
; CHECK-NEXT: --> {(sext i32 (3 + %start) to i64),+,3}<nsw><%loop>
81137
%c = load volatile i1, ptr %cond
82138
br i1 %c, label %loop, label %leave
83139

@@ -86,7 +142,25 @@ leave:
86142
}
87143

88144
define void @s_4(i32 %start, ptr %cond) {
89-
; CHECK-LABEL: Classifying expressions for: @s_4
145+
; CHECK-LABEL: 's_4'
146+
; CHECK-NEXT: Classifying expressions for: @s_4
147+
; CHECK-NEXT: %iv = phi i32 [ %start, %entry ], [ %iv.inc, %be ]
148+
; CHECK-NEXT: --> {%start,+,-3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
149+
; CHECK-NEXT: %iv.inc = add i32 %iv, -3
150+
; CHECK-NEXT: --> {(-3 + %start),+,-3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
151+
; CHECK-NEXT: %iv.inc.sext = sext i32 %iv.inc to i64
152+
; CHECK-NEXT: --> {(sext i32 (-3 + %start) to i64),+,-3}<nsw><%loop> U: [-4294968296,2147483648) S: [-4294968296,2147483648) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
153+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
154+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
155+
; CHECK-NEXT: Determining loop execution counts for: @s_4
156+
; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
157+
; CHECK-NEXT: exit count for loop: ((2 + (-1 * (-1000 smin %start)) + %start) /u 3)
158+
; CHECK-NEXT: exit count for be: ***COULDNOTCOMPUTE***
159+
; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 715828216
160+
; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((2 + (-1 * (-1000 smin %start)) + %start) /u 3)
161+
; CHECK-NEXT: symbolic max exit count for loop: ((2 + (-1 * (-1000 smin %start)) + %start) /u 3)
162+
; CHECK-NEXT: symbolic max exit count for be: ***COULDNOTCOMPUTE***
163+
;
90164
entry:
91165
br label %loop
92166

@@ -98,8 +172,6 @@ loop:
98172
be:
99173
%iv.inc = add i32 %iv, -3
100174
%iv.inc.sext = sext i32 %iv.inc to i64
101-
; CHECK: %iv.inc.sext = sext i32 %iv.inc to i64
102-
; CHECK-NEXT: --> {(sext i32 (-3 + %start) to i64),+,-3}<nsw><%loop>
103175
%c = load volatile i1, ptr %cond
104176
br i1 %c, label %loop, label %leave
105177

@@ -108,16 +180,28 @@ leave:
108180
}
109181

110182
define void @u_0(i32 %n, ptr %cond) {
111-
; CHECK-LABEL: Classifying expressions for: @u_0
183+
; CHECK-LABEL: 'u_0'
184+
; CHECK-NEXT: Classifying expressions for: @u_0
185+
; CHECK-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
186+
; CHECK-NEXT: --> {0,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
187+
; CHECK-NEXT: %iv.inc = add i32 %iv, 1
188+
; CHECK-NEXT: --> {1,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
189+
; CHECK-NEXT: %iv.zext = zext i32 %iv to i64
190+
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
191+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
192+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
193+
; CHECK-NEXT: Determining loop execution counts for: @u_0
194+
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
195+
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
196+
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
197+
;
112198
entry:
113199
br label %loop
114200

115201
loop:
116202
%iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
117203
%iv.inc = add i32 %iv, 1
118204
%iv.zext = zext i32 %iv to i64
119-
; CHECK: %iv.zext = zext i32 %iv to i64
120-
; CHECK-NEXT: --> {0,+,1}<nuw><%loop>
121205
%cmp = icmp ult i32 %iv, %n
122206
call void(i1, ...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
123207
%c = load volatile i1, ptr %cond
@@ -128,16 +212,28 @@ leave:
128212
}
129213

130214
define void @u_1(ptr %cond) {
131-
; CHECK-LABEL: Classifying expressions for: @u_1
215+
; CHECK-LABEL: 'u_1'
216+
; CHECK-NEXT: Classifying expressions for: @u_1
217+
; CHECK-NEXT: %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
218+
; CHECK-NEXT: --> {0,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
219+
; CHECK-NEXT: %iv.inc = add i32 %iv, 3
220+
; CHECK-NEXT: --> {3,+,3}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
221+
; CHECK-NEXT: %iv.zext = zext i32 %iv to i64
222+
; CHECK-NEXT: --> {0,+,3}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
223+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
224+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
225+
; CHECK-NEXT: Determining loop execution counts for: @u_1
226+
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
227+
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
228+
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
229+
;
132230
entry:
133231
br label %loop
134232

135233
loop:
136234
%iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
137235
%iv.inc = add i32 %iv, 3
138236
%iv.zext = zext i32 %iv to i64
139-
; CHECK: %iv.zext = zext i32 %iv to i64
140-
; CHECK-NEXT: --> {0,+,3}<nuw><%loop>
141237
%cmp = icmp ult i32 %iv, 10000
142238
call void(i1, ...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
143239
%c = load volatile i1, ptr %cond
@@ -148,7 +244,21 @@ leave:
148244
}
149245

150246
define void @u_2(ptr %cond) {
151-
; CHECK-LABEL: Classifying expressions for: @u_2
247+
; CHECK-LABEL: 'u_2'
248+
; CHECK-NEXT: Classifying expressions for: @u_2
249+
; CHECK-NEXT: %iv = phi i32 [ 30000, %entry ], [ %iv.inc, %loop ]
250+
; CHECK-NEXT: --> {30000,+,-2}<%loop> U: [0,-1) S: [-2147483648,2147483647) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
251+
; CHECK-NEXT: %iv.inc = add i32 %iv, -2
252+
; CHECK-NEXT: --> {29998,+,-2}<%loop> U: [0,-1) S: [-2147483648,2147483647) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
253+
; CHECK-NEXT: %iv.zext = zext i32 %iv to i64
254+
; CHECK-NEXT: --> {30000,+,-2}<nw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
255+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
256+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
257+
; CHECK-NEXT: Determining loop execution counts for: @u_2
258+
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
259+
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
260+
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
261+
;
152262
entry:
153263
br label %loop
154264

@@ -157,8 +267,6 @@ loop:
157267
%iv.inc = add i32 %iv, -2
158268
%iv.zext = zext i32 %iv to i64
159269
%cmp = icmp ugt i32 %iv.inc, -10000
160-
; CHECK: %iv.zext = zext i32 %iv to i64
161-
; CHECK-NEXT: --> {30000,+,-2}<nw><%loop>
162270
call void @llvm.assume(i1 %cmp)
163271
%c = load volatile i1, ptr %cond
164272
br i1 %c, label %loop, label %leave
@@ -168,7 +276,25 @@ leave:
168276
}
169277

170278
define void @u_3(i32 %start, ptr %cond) {
171-
; CHECK-LABEL: Classifying expressions for: @u_3
279+
; CHECK-LABEL: 'u_3'
280+
; CHECK-NEXT: Classifying expressions for: @u_3
281+
; CHECK-NEXT: %iv = phi i32 [ %start, %entry ], [ %iv.inc, %be ]
282+
; CHECK-NEXT: --> {%start,+,3}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
283+
; CHECK-NEXT: %iv.inc = add i32 %iv, 3
284+
; CHECK-NEXT: --> {(3 + %start),+,3}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
285+
; CHECK-NEXT: %iv.inc.zext = zext i32 %iv.inc to i64
286+
; CHECK-NEXT: --> {(zext i32 (3 + %start) to i64),+,3}<nuw><%loop> U: [0,4294977298) S: [0,4294977298) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
287+
; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1
288+
; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
289+
; CHECK-NEXT: Determining loop execution counts for: @u_3
290+
; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
291+
; CHECK-NEXT: exit count for loop: ((((-1 * (1 umin ((-1 * %start) + (10000 umax %start))))<nuw><nsw> + (-1 * %start) + (10000 umax %start)) /u 3) + (1 umin ((-1 * %start) + (10000 umax %start))))
292+
; CHECK-NEXT: exit count for be: ***COULDNOTCOMPUTE***
293+
; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 3334
294+
; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((((-1 * (1 umin ((-1 * %start) + (10000 umax %start))))<nuw><nsw> + (-1 * %start) + (10000 umax %start)) /u 3) + (1 umin ((-1 * %start) + (10000 umax %start))))
295+
; CHECK-NEXT: symbolic max exit count for loop: ((((-1 * (1 umin ((-1 * %start) + (10000 umax %start))))<nuw><nsw> + (-1 * %start) + (10000 umax %start)) /u 3) + (1 umin ((-1 * %start) + (10000 umax %start))))
296+
; CHECK-NEXT: symbolic max exit count for be: ***COULDNOTCOMPUTE***
297+
;
172298
entry:
173299
br label %loop
174300

@@ -180,8 +306,6 @@ loop:
180306
be:
181307
%iv.inc = add i32 %iv, 3
182308
%iv.inc.zext = zext i32 %iv.inc to i64
183-
; CHECK: %iv.inc.zext = zext i32 %iv.inc to i64
184-
; CHECK-NEXT: --> {(zext i32 (3 + %start) to i64),+,3}<nuw><%loop>
185309
%c = load volatile i1, ptr %cond
186310
br i1 %c, label %loop, label %leave
187311

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