1; RUN: opt < %s -analyze -enable-new-pm=0 -iv-users
2; RUN: opt < %s -disable-output -iv-users
3; RUN: opt < %s -passes='print<iv-users>'
4; PR9633: Tests that SCEV handles the mul.i2 recurrence being folded to
5; constant zero.
6
7define signext i8 @func_14(i8 signext %p_18) nounwind readnone ssp {
8entry:
9  br label %for.inc
10
11for.inc:
12  %p_17.addr.012 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
13  %add = add nsw i32 %p_17.addr.012, 1
14  br i1 false, label %for.inc, label %for.cond
15
16for.cond:
17  %tobool.i = icmp ult i32 %add, 8192
18  %shl.i = select i1 %tobool.i, i32 13, i32 0
19  %shl.left.i = shl i32 %add, %shl.i
20  %conv.i4 = trunc i32 %shl.left.i to i8
21  br i1 undef, label %for.inc9, label %if.then
22
23for.inc9:
24  %p_18.addr.011 = phi i8 [ %add12, %for.inc9 ], [ %p_18, %for.cond ]
25  %add12 = add i8 %p_18.addr.011, 1
26  %mul.i2 = mul i8 %add12, %conv.i4
27  %mul.i2.lobit = lshr i8 %mul.i2, 7
28  %lor.ext.shr.i = select i1 undef, i8 %mul.i2.lobit, i8 %mul.i2
29  %tobool = icmp eq i8 %lor.ext.shr.i, 0
30  br i1 %tobool, label %for.inc9, label %if.then
31
32if.then:
33  ret i8 0
34
35}
36