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 ptr null, align 4
18 @a = common global ptr null, align 4
20 ; Function Attrs: nounwind readonly uwtable
21 define i32 @fn1() #0 {
23 %0 = load ptr, ptr @b, align 4
24 %1 = ptrtoint ptr %0 to i32
25 %cmp = icmp sgt ptr %0, null
26 %2 = load ptr, ptr @a, align 4
27 br i1 %cmp, label %for.bodythread-pre-split, label %if.end8
29 for.bodythread-pre-split: ; preds = %entry
30 %.pr = load i32, ptr %2, align 4
33 for.body: ; preds = %for.bodythread-pre-split, %for.body
34 switch i32 %.pr, label %for.body [
35 i32 0, label %while.body.lr.ph.preheader
36 i32 2, label %while.body.lr.ph.preheader
39 while.body.lr.ph.preheader: ; preds = %for.body, %for.body
40 br label %while.body.lr.ph
42 while.body.lr.ph: ; preds = %while.body.lr.ph.preheader, %if.then6
43 %j.1.ph13 = phi i32 [ %j.110.lcssa, %if.then6 ], [ 0, %while.body.lr.ph.preheader ]
44 %c.0.ph12 = phi i32 [ %dec, %if.then6 ], [ %1, %while.body.lr.ph.preheader ]
47 while.cond: ; preds = %while.body
48 %cmp2 = icmp slt i32 %inc7, %c.0.ph12
49 br i1 %cmp2, label %while.body, label %if.end8.loopexit
51 while.body: ; preds = %while.body.lr.ph, %while.cond
52 %j.110 = phi i32 [ %j.1.ph13, %while.body.lr.ph ], [ %inc7, %while.cond ]
53 %aclass_index = getelementptr inbounds %struct.anon, ptr %0, i32 %j.110, i32 0
54 %3 = load i32, ptr %aclass_index, align 4
55 %aclass5 = getelementptr inbounds %struct.anon.0, ptr %2, i32 %3, i32 0
56 %4 = load i32, ptr %aclass5, align 4
57 %tobool = icmp eq i32 %4, 0
58 %inc7 = add nsw i32 %j.110, 1
59 br i1 %tobool, label %while.cond, label %if.then6
61 if.then6: ; preds = %while.body
62 %j.110.lcssa = phi i32 [ %j.110, %while.body ]
63 %dec = add nsw i32 %c.0.ph12, -1
64 %cmp29 = icmp slt i32 %j.110.lcssa, %dec
65 br i1 %cmp29, label %while.body.lr.ph, label %if.end8.loopexit17
67 if.end8.loopexit: ; preds = %while.cond
70 if.end8.loopexit17: ; preds = %if.then6
73 if.end8: ; preds = %if.end8.loopexit17, %if.end8.loopexit, %entry
77 attributes #0 = { nounwind readonly uwtable }