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