1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
2 ; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
4 define void @f(i1 %c) {
6 ; CHECK-NEXT: Classifying expressions for: @f
7 ; CHECK-NEXT: %start = select i1 %c, i32 100, i32 0
8 ; CHECK-NEXT: --> %start U: [0,101) S: [0,101)
9 ; CHECK-NEXT: %step = select i1 %c, i32 -1, i32 1
10 ; CHECK-NEXT: --> %step U: [1,0) S: [-2,2)
11 ; CHECK-NEXT: %iv = phi i32 [ %start, %entry ], [ %iv.dec, %loop ]
12 ; CHECK-NEXT: --> {%start,+,%step}<nsw><%loop> U: [0,101) S: [0,101) Exits: ((99 * %step)<nsw> + %start) LoopDispositions: { %loop: Computable }
13 ; CHECK-NEXT: %iv.tc = phi i32 [ 0, %entry ], [ %iv.tc.inc, %loop ]
14 ; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,100) S: [0,100) Exits: 99 LoopDispositions: { %loop: Computable }
15 ; CHECK-NEXT: %iv.tc.inc = add i32 %iv.tc, 1
16 ; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,101) S: [1,101) Exits: 100 LoopDispositions: { %loop: Computable }
17 ; CHECK-NEXT: %iv.dec = add nsw i32 %iv, %step
18 ; CHECK-NEXT: --> {(%step + %start),+,%step}<nw><%loop> U: [-200,201) S: [-200,201) Exits: ((100 * %step)<nsw> + %start) LoopDispositions: { %loop: Computable }
19 ; CHECK-NEXT: %iv.sext = sext i32 %iv to i64
20 ; CHECK-NEXT: --> {(zext i32 %start to i64),+,(sext i32 %step to i64)}<nsw><%loop> U: [0,101) S: [0,101) Exits: ((zext i32 %start to i64) + (99 * (sext i32 %step to i64))<nsw>) LoopDispositions: { %loop: Computable }
21 ; CHECK-NEXT: Determining loop execution counts for: @f
22 ; CHECK-NEXT: Loop %loop: backedge-taken count is 99
23 ; CHECK-NEXT: Loop %loop: constant max backedge-taken count is 99
24 ; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is 99
25 ; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is 99
26 ; CHECK-NEXT: Predicates:
27 ; CHECK-NEXT: Loop %loop: Trip multiple is 100
30 %start = select i1 %c, i32 100, i32 0
31 %step = select i1 %c, i32 -1, i32 1
35 %iv = phi i32 [ %start, %entry ], [ %iv.dec, %loop ]
36 %iv.tc = phi i32 [ 0, %entry ], [ %iv.tc.inc, %loop ]
37 %iv.tc.inc = add i32 %iv.tc, 1
38 %iv.dec = add nsw i32 %iv, %step
39 %iv.sext = sext i32 %iv to i64
40 %be = icmp ne i32 %iv.tc.inc, 100
41 br i1 %be, label %loop, label %leave