1 ; RUN: llc -verify-machineinstrs -mcpu=pwr7 < %s | FileCheck %s
2 target datalayout = "E-m:e-p:32:32-i64:64-n32"
3 target triple = "powerpc-unknown-linux-gnu"
5 ; This code would cause code generation like this after PPCCTRLoops ran:
6 ; %indvar = phi i32 [ 0, %for.body ], [ %indvar.next, %if.then6 ]
7 ; %j.1.ph13 = phi i32 [ %j.110, %if.then6 ], [ 0, %for.body ], [ 0, %for.body ]
8 ; %c.0.ph12 = phi i32 [ %dec, %if.then6 ], [ %2, %for.body ], [ %2, %for.body ]
9 ; which would fail verification because the created induction variable does not
10 ; have as many predecessor entries as the other PHIs.
14 %struct.anon = type { i32 }
15 %struct.anon.0 = type { i32 }
17 @b = common global %struct.anon* null, align 4
18 @a = common global %struct.anon.0* null, align 4
20 ; Function Attrs: nounwind readonly uwtable
21 define i32 @fn1() #0 {
23 %0 = load %struct.anon*, %struct.anon** @b, align 4
24 %1 = ptrtoint %struct.anon* %0 to i32
25 %cmp = icmp sgt %struct.anon* %0, null
26 %2 = load %struct.anon.0*, %struct.anon.0** @a, align 4
27 br i1 %cmp, label %for.bodythread-pre-split, label %if.end8
29 for.bodythread-pre-split: ; preds = %entry
30 %aclass = getelementptr inbounds %struct.anon.0, %struct.anon.0* %2, i32 0, i32 0
31 %.pr = load i32, i32* %aclass, align 4
34 for.body: ; preds = %for.bodythread-pre-split, %for.body
35 switch i32 %.pr, label %for.body [
36 i32 0, label %while.body.lr.ph.preheader
37 i32 2, label %while.body.lr.ph.preheader
40 while.body.lr.ph.preheader: ; preds = %for.body, %for.body
41 br label %while.body.lr.ph
43 while.body.lr.ph: ; preds = %while.body.lr.ph.preheader, %if.then6
44 %j.1.ph13 = phi i32 [ %j.110.lcssa, %if.then6 ], [ 0, %while.body.lr.ph.preheader ]
45 %c.0.ph12 = phi i32 [ %dec, %if.then6 ], [ %1, %while.body.lr.ph.preheader ]
48 while.cond: ; preds = %while.body
49 %cmp2 = icmp slt i32 %inc7, %c.0.ph12
50 br i1 %cmp2, label %while.body, label %if.end8.loopexit
52 while.body: ; preds = %while.body.lr.ph, %while.cond
53 %j.110 = phi i32 [ %j.1.ph13, %while.body.lr.ph ], [ %inc7, %while.cond ]
54 %aclass_index = getelementptr inbounds %struct.anon, %struct.anon* %0, i32 %j.110, i32 0
55 %3 = load i32, i32* %aclass_index, align 4
56 %aclass5 = getelementptr inbounds %struct.anon.0, %struct.anon.0* %2, i32 %3, i32 0
57 %4 = load i32, i32* %aclass5, align 4
58 %tobool = icmp eq i32 %4, 0
59 %inc7 = add nsw i32 %j.110, 1
60 br i1 %tobool, label %while.cond, label %if.then6
62 if.then6: ; preds = %while.body
63 %j.110.lcssa = phi i32 [ %j.110, %while.body ]
64 %dec = add nsw i32 %c.0.ph12, -1
65 %cmp29 = icmp slt i32 %j.110.lcssa, %dec
66 br i1 %cmp29, label %while.body.lr.ph, label %if.end8.loopexit17
68 if.end8.loopexit: ; preds = %while.cond
71 if.end8.loopexit17: ; preds = %if.then6
74 if.end8: ; preds = %if.end8.loopexit17, %if.end8.loopexit, %entry
78 attributes #0 = { nounwind readonly uwtable }