1; RUN: opt -S -loop-rotate < %s | FileCheck %s
2target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
3target triple = "x86_64-apple-darwin10.0"
4
5; PR5837
6define void @test(i32 %N, double* %G) nounwind ssp {
7entry:
8  br label %for.cond
9
10for.cond:                                         ; preds = %for.body, %entry
11  %j.0 = phi i64 [ 1, %entry ], [ %inc, %for.body ] ; <i64> [#uses=5]
12  %cmp = icmp slt i64 %j.0, 1000                  ; <i1> [#uses=1]
13  br i1 %cmp, label %for.body, label %for.end
14
15for.body:                                         ; preds = %for.cond
16  %arrayidx = getelementptr inbounds double* %G, i64 %j.0 ; <double*> [#uses=1]
17  %tmp3 = load double* %arrayidx                  ; <double> [#uses=1]
18  %sub = sub i64 %j.0, 1                          ; <i64> [#uses=1]
19  %arrayidx6 = getelementptr inbounds double* %G, i64 %sub ; <double*> [#uses=1]
20  %tmp7 = load double* %arrayidx6                 ; <double> [#uses=1]
21  %add = fadd double %tmp3, %tmp7                 ; <double> [#uses=1]
22  %arrayidx10 = getelementptr inbounds double* %G, i64 %j.0 ; <double*> [#uses=1]
23  store double %add, double* %arrayidx10
24  %inc = add nsw i64 %j.0, 1                      ; <i64> [#uses=1]
25  br label %for.cond
26
27for.end:                                          ; preds = %for.cond
28  ret void
29}
30
31; Should only end up with one phi.
32; CHECK-LABEL:      define void @test(
33; CHECK-NEXT: entry:
34; CHECK-NEXT:   br label %for.body
35; CHECK:      for.body:
36; CHECK-NEXT:   %j.01 = phi i64
37; CHECK-NOT:  br
38; CHECK:   br i1 %cmp, label %for.body, label %for.end
39; CHECK:      for.end:
40; CHECK-NEXT:        ret void
41