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1; RUN: opt < %s -indvars -S | FileCheck %s
2; Test WidenIV::GetExtendedOperandRecurrence.
3; %add, %sub and %mul should be extended to i64 because it is nsw, even though its
4; sext cannot be hoisted outside the loop.
5
6target 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"
7
8declare void @use(i64 %x)
9
10define void @test() nounwind {
11entry:
12  br i1 undef, label %for.body11, label %for.end285
13
14for.body11:                                       ; preds = %entry
15  %shl = shl i32 1, 1
16  %shl132 = shl i32 %shl, 1
17  br label %for.body153
18
19for.body153:                                      ; preds = %for.body153, %for.body11
20  br i1 undef, label %for.body170, label %for.body153
21
22; CHECK: add nuw nsw i64 %indvars.iv, 1
23; CHECK: sub nsw i64 %indvars.iv, 2
24; CHECK: sub nsw i64 4, %indvars.iv
25; CHECK: mul nsw i64 %indvars.iv, 8
26for.body170:                                      ; preds = %for.body170, %for.body153
27  %i2.19 = phi i32 [ %add249, %for.body170 ], [ 0, %for.body153 ]
28
29  %add = add nsw i32 %i2.19, 1
30  %add.idxprom = sext i32 %add to i64
31  call void @use(i64 %add.idxprom)
32
33  %sub = sub nsw i32 %i2.19, 2
34  %sub.idxprom = sext i32 %sub to i64
35  call void @use(i64 %sub.idxprom)
36
37  %sub.neg = sub nsw i32 4, %i2.19
38  %sub.neg.idxprom = sext i32 %sub.neg to i64
39  call void @use(i64 %sub.neg.idxprom)
40
41  %mul = mul nsw i32 %i2.19, 8
42  %mul.idxprom = sext i32 %mul to i64
43  call void @use(i64 %mul.idxprom)
44
45  %add249 = add nsw i32 %i2.19, %shl132
46  br label %for.body170
47for.end285:                                       ; preds = %entry
48  ret void
49}
50