1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
2 ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
5 target triple = "x86_64-unknown-linux-gnu"
7 @A = weak global [1000 x i32] zeroinitializer, align 32
9 define void @PR1101(i32 %N) {
10 ; CHECK-LABEL: 'PR1101'
11 ; CHECK-NEXT: Determining loop execution counts for: @PR1101
12 ; CHECK-NEXT: Loop %bb3: backedge-taken count is 10000
13 ; CHECK-NEXT: Loop %bb3: constant max backedge-taken count is 10000
14 ; CHECK-NEXT: Loop %bb3: symbolic max backedge-taken count is 10000
15 ; CHECK-NEXT: Loop %bb3: Predicated backedge-taken count is 10000
16 ; CHECK-NEXT: Predicates:
17 ; CHECK-NEXT: Loop %bb3: Trip multiple is 10001
23 %tmp = getelementptr [1000 x i32], ptr @A, i32 0, i32 %i.0 ; <ptr> [#uses=1]
24 store i32 123, ptr %tmp
25 %tmp2 = add i32 %i.0, 1 ; <i32> [#uses=1]
28 bb3: ; preds = %bb, %entry
29 %i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=3]
30 %tmp3 = icmp sle i32 %i.0, 9999 ; <i1> [#uses=1]
31 br i1 %tmp3, label %bb, label %bb5
36 return: ; preds = %bb5
40 define i32 @PR22795() {
41 ; CHECK-LABEL: 'PR22795'
42 ; CHECK-NEXT: Determining loop execution counts for: @PR22795
43 ; CHECK-NEXT: Loop %preheader: backedge-taken count is 7
44 ; CHECK-NEXT: Loop %preheader: constant max backedge-taken count is 7
45 ; CHECK-NEXT: Loop %preheader: symbolic max backedge-taken count is 7
46 ; CHECK-NEXT: Loop %preheader: Predicated backedge-taken count is 7
47 ; CHECK-NEXT: Predicates:
48 ; CHECK-NEXT: Loop %preheader: Trip multiple is 8
51 %bins = alloca [16 x i64], align 16
52 call void @llvm.memset.p0.i64(ptr align 16 %bins, i8 0, i64 128, i1 false)
55 preheader: ; preds = %for.inc.1, %entry
56 %v11 = phi i64 [ 0, %entry ], [ %next12.1, %for.inc.1 ]
57 %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ]
58 %cmp = icmp sgt i64 %v11, 0
59 br i1 %cmp, label %for.body, label %for.inc
61 for.body: ; preds = %preheader
62 %zext = zext i32 %iv to i64
63 %arrayidx = getelementptr [16 x i64], ptr %bins, i64 0, i64 %v11
64 %loaded = load i64, ptr %arrayidx, align 8
65 %add = add i64 %loaded, 1
66 %add2 = add i64 %add, %zext
67 store i64 %add2, ptr %arrayidx, align 8
70 for.inc: ; preds = %for.body, %preheader
71 %next12 = add nuw nsw i64 %v11, 1
72 %next = add nsw i32 %iv, 1
73 br i1 true, label %for.body.1, label %for.inc.1
75 end: ; preds = %for.inc.1
76 %arrayidx8 = getelementptr [16 x i64], ptr %bins, i64 0, i64 2
77 %load = load i64, ptr %arrayidx8, align 16
78 %shr4 = lshr i64 %load, 32
79 %conv = trunc i64 %shr4 to i32
82 for.body.1: ; preds = %for.inc
83 %zext.1 = zext i32 %next to i64
84 %arrayidx.1 = getelementptr [16 x i64], ptr %bins, i64 0, i64 %next12
85 %loaded.1 = load i64, ptr %arrayidx.1, align 8
86 %add.1 = add i64 %loaded.1, 1
87 %add2.1 = add i64 %add.1, %zext.1
88 store i64 %add2.1, ptr %arrayidx.1, align 8
91 for.inc.1: ; preds = %for.body.1, %for.inc
92 %next12.1 = add nuw nsw i64 %next12, 1
93 %next.1 = add nuw nsw i32 %next, 1
94 %exitcond.1 = icmp eq i64 %next12.1, 16
95 br i1 %exitcond.1, label %end, label %preheader
98 ; Function Attrs: nounwind
99 declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) #0
101 declare void @may_exit() nounwind
103 define void @pr28012(i32 %n) {
104 ; CHECK-LABEL: 'pr28012'
105 ; CHECK-NEXT: Determining loop execution counts for: @pr28012
106 ; CHECK-NEXT: Loop %loop: backedge-taken count is -1431655751
107 ; CHECK-NEXT: Loop %loop: constant max backedge-taken count is -1431655751
108 ; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is -1431655751
109 ; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is -1431655751
110 ; CHECK-NEXT: Predicates:
111 ; CHECK-NEXT: Loop %loop: Trip multiple is 2863311546
117 %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
118 %iv.inc = add nsw i32 %iv, 3
119 call void @may_exit()
120 %becond = icmp ne i32 %iv.inc, 46
121 br i1 %becond, label %loop, label %leave
127 define void @non_zero_from_loop_guard(i16 %n) {
128 ; CHECK-LABEL: 'non_zero_from_loop_guard'
129 ; CHECK-NEXT: Determining loop execution counts for: @non_zero_from_loop_guard
130 ; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (%n /u 2))<nsw>
131 ; CHECK-NEXT: Loop %loop: constant max backedge-taken count is 32766
132 ; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is (-1 + (%n /u 2))<nsw>
133 ; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (%n /u 2))<nsw>
134 ; CHECK-NEXT: Predicates:
135 ; CHECK-NEXT: Loop %loop: Trip multiple is 1
138 %shr = lshr i16 %n, 1
139 %precond = icmp ult i16 %n, 2
140 br i1 %precond, label %exit, label %loop
143 %iv = phi i16 [ %inc, %loop ], [ 0, %entry ]
144 %inc = add nuw nsw i16 %iv, 1
145 %cmp = icmp ult i16 %inc, %shr
146 br i1 %cmp, label %loop, label %exit