aboutsummaryrefslogtreecommitdiff
path: root/test/Analysis/ScalarEvolution/2008-05-25-NegativeStepToZero.ll
blob: 41734d70f0717adf9644031ec0f30a8511e5fbe0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
; RUN: opt < %s -analyze -scalar-evolution \
; RUN:   -scalar-evolution-max-iterations=0 | grep "backedge-taken count is 61"
; PR2364

define i32 @func_6() nounwind  {
entry:
	br label %bb5

bb:		; preds = %bb5
	%tmp2 = add i32 %i.0, 1		; <i32> [#uses=1]
	%tmp4 = add i8 %x.0, -4		; <i8> [#uses=1]
	br label %bb5

bb5:		; preds = %bb, %entry
	%x.0 = phi i8 [ 0, %entry ], [ %tmp4, %bb ]		; <i8> [#uses=2]
	%i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ]		; <i32> [#uses=2]
	%tmp7 = icmp eq i8 %x.0, 12		; <i1> [#uses=1]
	br i1 %tmp7, label %return, label %bb

return:		; preds = %bb5
	ret i32 %i.0
}