1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
2 ; RUN: opt -S -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
4 define dso_local void @simple(i32 noundef %n) local_unnamed_addr {
5 ; CHECK-LABEL: 'simple'
6 ; CHECK-NEXT: Classifying expressions for: @simple
7 ; CHECK-NEXT: %right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
8 ; CHECK-NEXT: --> {%n,+,-4}<nsw><%while.body> U: full-set S: full-set Exits: ((-4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nsw> + %n) LoopDispositions: { %while.body: Computable }
9 ; CHECK-NEXT: %left.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
10 ; CHECK-NEXT: --> {0,+,4}<nuw><nsw><%while.body> U: [0,2147483641) S: [0,2147483641) Exits: (4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nuw> LoopDispositions: { %while.body: Computable }
11 ; CHECK-NEXT: %inc = add nuw nsw i32 %left.05, 4
12 ; CHECK-NEXT: --> {4,+,4}<nuw><nsw><%while.body> U: [4,2147483645) S: [4,2147483645) Exits: (4 + (4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nuw>)<nuw> LoopDispositions: { %while.body: Computable }
13 ; CHECK-NEXT: %dec = add nsw i32 %right.06, -4
14 ; CHECK-NEXT: --> {(-4 + %n),+,-4}<nsw><%while.body> U: full-set S: full-set Exits: (-4 + (-4 * (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>)))<nsw> + %n) LoopDispositions: { %while.body: Computable }
15 ; CHECK-NEXT: Determining loop execution counts for: @simple
16 ; CHECK-NEXT: Loop %while.body: backedge-taken count is (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))
17 ; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 536870910
18 ; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is (((-4 + (-1 * (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))<nuw><nsw> + (4 smax (-4 + %n))) /u 8) + (1 umin (-4 + (4 smax (-4 + %n)))<nsw>))
19 ; CHECK-NEXT: Loop %while.body: Trip multiple is 1
22 %cmp4 = icmp sgt i32 %n, 0
23 br i1 %cmp4, label %while.body, label %while.end
26 %right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
27 %left.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
28 %inc = add nuw nsw i32 %left.05, 4
29 %dec = add nsw i32 %right.06, -4
30 %cmp = icmp slt i32 %inc, %dec
31 br i1 %cmp, label %while.body, label %while.end
37 ; Cannot find backedge-count because subtraction of strides is wrapping.
38 define dso_local void @stride_overflow(i32 noundef %n) local_unnamed_addr {
39 ; CHECK-LABEL: 'stride_overflow'
40 ; CHECK-NEXT: Classifying expressions for: @stride_overflow
41 ; CHECK-NEXT: %right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
42 ; CHECK-NEXT: --> {%n,+,-1}<nsw><%while.body> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
43 ; CHECK-NEXT: %left.05 = phi i32 [ %inc, %while.body ], [ 2147483647, %entry ]
44 ; CHECK-NEXT: --> {2147483647,+,2147483647}<nuw><nsw><%while.body> U: [2147483647,-2147483648) S: [2147483647,-2147483648) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
45 ; CHECK-NEXT: %inc = add nuw nsw i32 %left.05, 2147483647
46 ; CHECK-NEXT: --> {-2,+,2147483647}<nuw><nsw><%while.body> U: [-2,-1) S: [-2,0) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
47 ; CHECK-NEXT: %dec = add nsw i32 %right.06, -1
48 ; CHECK-NEXT: --> {(-1 + %n),+,-1}<nsw><%while.body> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
49 ; CHECK-NEXT: Determining loop execution counts for: @stride_overflow
50 ; CHECK-NEXT: Loop %while.body: Unpredictable backedge-taken count.
51 ; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 1
52 ; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is i32 1
55 %cmp4 = icmp sgt i32 %n, 0
56 br i1 %cmp4, label %while.body, label %while.end
59 %right.06 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
60 %left.05 = phi i32 [ %inc, %while.body ], [ 2147483647, %entry ]
61 %inc = add nuw nsw i32 %left.05, 2147483647
62 %dec = add nsw i32 %right.06, -1
63 %cmp = icmp slt i32 %inc, %dec
64 br i1 %cmp, label %while.body, label %while.end
70 ; Cannot find backedge-count because %conv110 is wrapping
71 define dso_local void @rhs_wrapping() local_unnamed_addr {
72 ; CHECK-LABEL: 'rhs_wrapping'
73 ; CHECK-NEXT: Classifying expressions for: @rhs_wrapping
74 ; CHECK-NEXT: %a = alloca i8, align 1
75 ; CHECK-NEXT: --> %a U: full-set S: full-set
76 ; CHECK-NEXT: %conv110 = phi i32 [ 0, %entry ], [ %sext8, %while.body ]
77 ; CHECK-NEXT: --> {0,+,-1090519040}<%while.body> U: [0,-16777215) S: [-2147483648,2130706433) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
78 ; CHECK-NEXT: %conv9 = phi i32 [ -2147483648, %entry ], [ %sext, %while.body ]
79 ; CHECK-NEXT: --> {-2147483648,+,16777216}<nsw><%while.body> U: [0,-16777215) S: [-2147483648,2113929217) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
80 ; CHECK-NEXT: %sext = add nsw i32 %conv9, 16777216
81 ; CHECK-NEXT: --> {-2130706432,+,16777216}<nsw><%while.body> U: [0,-16777215) S: [-2130706432,2130706433) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
82 ; CHECK-NEXT: %sext8 = add i32 %conv110, -1090519040
83 ; CHECK-NEXT: --> {-1090519040,+,-1090519040}<%while.body> U: [0,-16777215) S: [-2147483648,2130706433) Exits: <<Unknown>> LoopDispositions: { %while.body: Computable }
84 ; CHECK-NEXT: Determining loop execution counts for: @rhs_wrapping
85 ; CHECK-NEXT: Loop %while.body: Unpredictable backedge-taken count.
86 ; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 254
87 ; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is i32 254
90 %a = alloca i8, align 1
94 %conv110 = phi i32 [ 0, %entry ], [ %sext8, %while.body ]
95 %conv9 = phi i32 [ -2147483648, %entry ], [ %sext, %while.body ]
96 %sext = add nsw i32 %conv9, 16777216
97 %sext8 = add i32 %conv110, -1090519040
98 %cmp = icmp slt i32 %sext, %sext8
99 br i1 %cmp, label %while.body, label %while.end
105 ; abs(left_stride) != abs(right_stride)
106 define dso_local void @simple2() local_unnamed_addr {
107 ; CHECK-LABEL: 'simple2'
108 ; CHECK-NEXT: Classifying expressions for: @simple2
109 ; CHECK-NEXT: %right.08 = phi i32 [ 50, %entry ], [ %add2, %while.body ]
110 ; CHECK-NEXT: --> {50,+,-5}<nsw><%while.body> U: [25,51) S: [25,51) Exits: 25 LoopDispositions: { %while.body: Computable }
111 ; CHECK-NEXT: %left.07 = phi i32 [ 0, %entry ], [ %add, %while.body ]
112 ; CHECK-NEXT: --> {0,+,4}<nuw><nsw><%while.body> U: [0,21) S: [0,21) Exits: 20 LoopDispositions: { %while.body: Computable }
113 ; CHECK-NEXT: %add = add nuw nsw i32 %left.07, 4
114 ; CHECK-NEXT: --> {4,+,4}<nuw><nsw><%while.body> U: [4,25) S: [4,25) Exits: 24 LoopDispositions: { %while.body: Computable }
115 ; CHECK-NEXT: %add2 = add nsw i32 %right.08, -5
116 ; CHECK-NEXT: --> {45,+,-5}<nsw><%while.body> U: [20,46) S: [20,46) Exits: 20 LoopDispositions: { %while.body: Computable }
117 ; CHECK-NEXT: Determining loop execution counts for: @simple2
118 ; CHECK-NEXT: Loop %while.body: backedge-taken count is i32 5
119 ; CHECK-NEXT: Loop %while.body: constant max backedge-taken count is i32 5
120 ; CHECK-NEXT: Loop %while.body: symbolic max backedge-taken count is i32 5
121 ; CHECK-NEXT: Loop %while.body: Trip multiple is 6
127 %right.08 = phi i32 [ 50, %entry ], [ %add2, %while.body ]
128 %left.07 = phi i32 [ 0, %entry ], [ %add, %while.body ]
129 %add = add nuw nsw i32 %left.07, 4
130 %add2 = add nsw i32 %right.08, -5
131 %cmp = icmp slt i32 %add, %add2
132 br i1 %cmp, label %while.body, label %while.end