1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
2 ; RUN: opt < %s -analyze -scalar-evolution -scalar-evolution-classify-expressions=0 | FileCheck %s
4 ; ScalarEvolution should be able to compute a loop exit value for %indvar.i8.
6 define void @another_count_down_signed(double* %d, i64 %n) nounwind {
7 ; CHECK-LABEL: 'another_count_down_signed'
8 ; CHECK-NEXT: Determining loop execution counts for: @another_count_down_signed
9 ; CHECK-NEXT: Loop %loop: backedge-taken count is (-11 + %n)
10 ; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
11 ; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-11 + %n)
12 ; CHECK-NEXT: Predicates:
13 ; CHECK: Loop %loop: Trip multiple is 1
18 loop: ; preds = %loop, %entry
19 %indvar = phi i64 [ %n, %entry ], [ %indvar.next, %loop ] ; <i64> [#uses=4]
20 %s0 = shl i64 %indvar, 8 ; <i64> [#uses=1]
21 %indvar.i8 = ashr i64 %s0, 8 ; <i64> [#uses=1]
22 %t0 = getelementptr double, double* %d, i64 %indvar.i8 ; <double*> [#uses=2]
23 %t1 = load double, double* %t0 ; <double> [#uses=1]
24 %t2 = fmul double %t1, 1.000000e-01 ; <double> [#uses=1]
25 store double %t2, double* %t0
26 %indvar.next = sub i64 %indvar, 1 ; <i64> [#uses=2]
27 %exitcond = icmp eq i64 %indvar.next, 10 ; <i1> [#uses=1]
28 br i1 %exitcond, label %return, label %loop
30 return: ; preds = %loop