1; RUN: opt -loop-reduce -S < %s | FileCheck %s
2; PR9939
3
4; LSR should properly handle the post-inc offset when folding the
5; non-IV operand of an icmp into the IV.
6
7; CHECK:   [[r1:%[a-z0-9\.]+]] = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
8; CHECK:   [[r2:%[a-z0-9\.]+]] = lshr exact i64 [[r1]], 1
9; CHECK:   [[r3:%[a-z0-9\.]+]] = bitcast i64 [[r2]] to i64
10; CHECK: for.body.lr.ph:
11; CHECK:   [[r4:%[a-z0-9]+]] = shl i64 [[r3]], 1
12; CHECK:   br label %for.body
13; CHECK: for.body:
14; CHECK:   %lsr.iv2 = phi i64 [ %lsr.iv.next, %for.body ], [ [[r4]], %for.body.lr.ph ]
15; CHECK:   %lsr.iv.next = add i64 %lsr.iv2, -2
16; CHECK:   %lsr.iv.next3 = inttoptr i64 %lsr.iv.next to i16*
17; CHECK:   %cmp27 = icmp eq i16* %lsr.iv.next3, null
18
19target 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"
20
21%struct.Vector2 = type { i16*, [64 x i16], i32 }
22
23@.str = private unnamed_addr constant [37 x i8] c"0123456789abcdefghijklmnopqrstuvwxyz\00"
24
25define void @_Z15IntegerToStringjjR7Vector2(i32 %i, i32 %radix, %struct.Vector2* nocapture %result) nounwind noinline {
26entry:
27  %buffer = alloca [33 x i16], align 16
28  %add.ptr = getelementptr inbounds [33 x i16], [33 x i16]* %buffer, i64 0, i64 33
29  %sub.ptr.lhs.cast = ptrtoint i16* %add.ptr to i64
30  %sub.ptr.rhs.cast = ptrtoint i16* %add.ptr to i64
31  br label %do.body
32
33do.body:                                          ; preds = %do.body, %entry
34  %0 = phi i64 [ %indvar.next44, %do.body ], [ 0, %entry ]
35  %i.addr.0 = phi i32 [ %div, %do.body ], [ %i, %entry ]
36  %tmp51 = sub i64 32, %0
37  %incdec.ptr = getelementptr [33 x i16], [33 x i16]* %buffer, i64 0, i64 %tmp51
38  %rem = urem i32 %i.addr.0, 10
39  %div = udiv i32 %i.addr.0, 10
40  %idxprom = zext i32 %rem to i64
41  %arrayidx = getelementptr inbounds [37 x i8], [37 x i8]* @.str, i64 0, i64 %idxprom
42  %tmp5 = load i8, i8* %arrayidx, align 1
43  %conv = sext i8 %tmp5 to i16
44  store i16 %conv, i16* %incdec.ptr, align 2
45  %1 = icmp ugt i32 %i.addr.0, 9
46  %indvar.next44 = add i64 %0, 1
47  br i1 %1, label %do.body, label %do.end
48
49do.end:                                           ; preds = %do.body
50  %xap.0 = inttoptr i64 %0 to i1*
51  %cap.0 = ptrtoint i1* %xap.0 to i64
52  %sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
53  %sub.ptr.div39 = lshr exact i64 %sub.ptr.sub, 1
54  %conv11 = trunc i64 %sub.ptr.div39 to i32
55  %mLength = getelementptr inbounds %struct.Vector2, %struct.Vector2* %result, i64 0, i32 2
56  %idx.ext21 = bitcast i64 %sub.ptr.div39 to i64
57  %incdec.ptr.sum = add i64 %idx.ext21, -1
58  %cp.0.sum = sub i64 %incdec.ptr.sum, %0
59  %add.ptr22 = getelementptr [33 x i16], [33 x i16]* %buffer, i64 1, i64 %cp.0.sum
60  %cmp2740 = icmp eq i64 %idx.ext21, 0
61  br i1 %cmp2740, label %for.end, label %for.body.lr.ph
62
63for.body.lr.ph:                                   ; preds = %do.end
64  %tmp16 = load i32, i32* %mLength, align 4
65  %mBegin = getelementptr inbounds %struct.Vector2, %struct.Vector2* %result, i64 0, i32 0
66  %tmp14 = load i16*, i16** %mBegin, align 8
67  %tmp48 = zext i32 %tmp16 to i64
68  br label %for.body
69
70for.body:                                         ; preds = %for.body, %for.body.lr.ph
71  %indvar = phi i64 [ 0, %for.body.lr.ph ], [ %indvar.next, %for.body ]
72  %tmp46 = add i64 %tmp51, %indvar
73  %p.042 = getelementptr [33 x i16], [33 x i16]* %buffer, i64 0, i64 %tmp46
74  %tmp47 = sub i64 %indvar, %0
75  %incdec.ptr32 = getelementptr [33 x i16], [33 x i16]* %buffer, i64 1, i64 %tmp47
76  %tmp49 = add i64 %tmp48, %indvar
77  %dst.041 = getelementptr i16, i16* %tmp14, i64 %tmp49
78  %tmp29 = load i16, i16* %p.042, align 2
79  store i16 %tmp29, i16* %dst.041, align 2
80  %cmp27 = icmp eq i16* %incdec.ptr32, %add.ptr22
81  %indvar.next = add i64 %indvar, 1
82  br i1 %cmp27, label %for.end.loopexit, label %for.body
83
84for.end.loopexit:                                 ; preds = %for.body
85  br label %for.end
86
87for.end:                                          ; preds = %for.end.loopexit, %do.end
88  %tmp38 = load i32, i32* %mLength, align 4
89  %add = add i32 %tmp38, %conv11
90  store i32 %add, i32* %mLength, align 4
91  ret void
92}
93