1 ; Split loop. Save last value. Split value is off by one in this example.
2 ; RUN: opt < %s -loop-index-split -disable-output -stats |& \
3 ; RUN: grep "loop-index-split" | count 1
5 @k = external global i32 ; <i32*> [#uses=2]
7 define void @foobar(i32 %a, i32 %b) {
11 bb: ; preds = %cond_next16, %entry
12 %i.01.0 = phi i32 [ 0, %entry ], [ %tmp18, %cond_next16 ] ; <i32> [#uses=5]
13 %tsum.18.0 = phi i32 [ 42, %entry ], [ %tsum.013.1, %cond_next16 ] ; <i32> [#uses=3]
14 %tmp1 = icmp sgt i32 %i.01.0, 50 ; <i1> [#uses=1]
15 br i1 %tmp1, label %cond_true, label %cond_false
17 cond_true: ; preds = %bb
18 %tmp4 = tail call i32 @foo( i32 %i.01.0 ) ; <i32> [#uses=1]
19 %tmp6 = add i32 %tmp4, %tsum.18.0 ; <i32> [#uses=2]
20 %tmp914 = load i32* @k, align 4 ; <i32> [#uses=1]
21 %tmp1015 = icmp eq i32 %tmp914, 0 ; <i1> [#uses=1]
22 br i1 %tmp1015, label %cond_next16, label %cond_true13
24 cond_false: ; preds = %bb
25 %tmp8 = tail call i32 @bar( i32 %i.01.0 ) ; <i32> [#uses=0]
26 %tmp9 = load i32* @k, align 4 ; <i32> [#uses=1]
27 %tmp10 = icmp eq i32 %tmp9, 0 ; <i1> [#uses=1]
28 br i1 %tmp10, label %cond_next16, label %cond_true13
30 cond_true13: ; preds = %cond_false, %cond_true
31 %tsum.013.0 = phi i32 [ %tmp6, %cond_true ], [ %tsum.18.0, %cond_false ] ; <i32> [#uses=1]
32 %tmp15 = tail call i32 @bar( i32 %i.01.0 ) ; <i32> [#uses=0]
35 cond_next16: ; preds = %cond_false, %cond_true, %cond_true13
36 %tsum.013.1 = phi i32 [ %tsum.013.0, %cond_true13 ], [ %tmp6, %cond_true ], [ %tsum.18.0, %cond_false ] ; <i32> [#uses=2]
37 %tmp18 = add i32 %i.01.0, 1 ; <i32> [#uses=3]
38 %tmp21 = icmp slt i32 %tmp18, 100 ; <i1> [#uses=1]
39 br i1 %tmp21, label %bb, label %bb24
41 bb24: ; preds = %cond_next16
42 %tmp18.lcssa = phi i32 [ %tmp18, %cond_next16 ] ; <i32> [#uses=1]
43 %tsum.013.1.lcssa = phi i32 [ %tsum.013.1, %cond_next16 ] ; <i32> [#uses=1]
44 %tmp27 = tail call i32 @t( i32 %tmp18.lcssa, i32 %tsum.013.1.lcssa ) ; <i32> [#uses=0]
52 declare i32 @t(i32, i32)