source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/ScalarEvolution/2011-04-26-FoldAddRec.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 967 bytes
Line 
1; RUN: opt < %s -analyze -iv-users
2; PR9633: Tests that SCEV handles the mul.i2 recurrence being folded to
3; constant zero.
4
5define signext i8 @func_14(i8 signext %p_18) nounwind readnone ssp {
6entry:
7  br label %for.inc
8
9for.inc:
10  %p_17.addr.012 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
11  %add = add nsw i32 %p_17.addr.012, 1
12  br i1 false, label %for.inc, label %for.cond
13
14for.cond:
15  %tobool.i = icmp ult i32 %add, 8192
16  %shl.i = select i1 %tobool.i, i32 13, i32 0
17  %shl.left.i = shl i32 %add, %shl.i
18  %conv.i4 = trunc i32 %shl.left.i to i8
19  br i1 undef, label %for.inc9, label %if.then
20
21for.inc9:
22  %p_18.addr.011 = phi i8 [ %add12, %for.inc9 ], [ %p_18, %for.cond ]
23  %add12 = add i8 %p_18.addr.011, 1
24  %mul.i2 = mul i8 %add12, %conv.i4
25  %mul.i2.lobit = lshr i8 %mul.i2, 7
26  %lor.ext.shr.i = select i1 undef, i8 %mul.i2.lobit, i8 %mul.i2
27  %tobool = icmp eq i8 %lor.ext.shr.i, 0
28  br i1 %tobool, label %for.inc9, label %if.then
29
30if.then:
31  ret i8 0
32
33}
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