1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
2 ; RUN: opt -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 < %s 2>&1 | FileCheck %s
4 ; ScalarEvolution should be able to use nsw information to prove that
5 ; this loop has a finite trip count.
7 define void @le(i64 %n, ptr nocapture %p) nounwind {
9 ; CHECK-NEXT: Determining loop execution counts for: @le
10 ; CHECK-NEXT: Loop %for.body: backedge-taken count is %n
11 ; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 9223372036854775807
12 ; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is %n
13 ; CHECK-NEXT: Loop %for.body: Trip multiple is 1
16 %cmp6 = icmp slt i64 %n, 0 ; <i1> [#uses=1]
17 br i1 %cmp6, label %for.end, label %for.body
19 for.body: ; preds = %for.body, %entry
20 %i = phi i64 [ %i.next, %for.body ], [ 0, %entry ] ; <i64> [#uses=2]
21 %arrayidx = getelementptr double, ptr %p, i64 %i ; <ptr> [#uses=2]
22 %t4 = load double, ptr %arrayidx ; <double> [#uses=1]
23 %mul = fmul double %t4, 2.200000e+00 ; <double> [#uses=1]
24 store double %mul, ptr %arrayidx
25 %i.next = add nsw i64 %i, 1 ; <i64> [#uses=2]
26 %cmp = icmp sgt i64 %i.next, %n ; <i1> [#uses=1]
27 br i1 %cmp, label %for.end, label %for.body
29 for.end: ; preds = %for.body, %entry