xref: /llvm-project/llvm/test/Analysis/ScalarEvolution/2008-05-25-NegativeStepToZero.ll (revision 0d38f21e4ab7fe7cebe76a9d7c218ec54dba1e98)
1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
2; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
3; PR2364
4
5
6define i32 @func_6() nounwind  {
7; CHECK-LABEL: 'func_6'
8; CHECK-NEXT:  Determining loop execution counts for: @func_6
9; CHECK-NEXT:  Loop %bb5: backedge-taken count is i8 61
10; CHECK-NEXT:  Loop %bb5: constant max backedge-taken count is i8 61
11; CHECK-NEXT:  Loop %bb5: symbolic max backedge-taken count is i8 61
12; CHECK-NEXT:  Loop %bb5: Trip multiple is 62
13;
14entry:
15	br label %bb5
16
17bb:		; preds = %bb5
18	%tmp2 = add i32 %i.0, 1		; <i32> [#uses=1]
19	%tmp4 = add i8 %x.0, -4		; <i8> [#uses=1]
20	br label %bb5
21
22bb5:		; preds = %bb, %entry
23	%x.0 = phi i8 [ 0, %entry ], [ %tmp4, %bb ]		; <i8> [#uses=2]
24	%i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ]		; <i32> [#uses=2]
25	%tmp7 = icmp eq i8 %x.0, 12		; <i1> [#uses=1]
26	br i1 %tmp7, label %return, label %bb
27
28return:		; preds = %bb5
29	ret i32 %i.0
30}
31