1; RUN: opt < %s  -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7 -dce -instcombine -S | FileCheck %s
2; RUN: opt < %s  -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7 -force-vector-interleave=0 -dce -instcombine -S | FileCheck %s -check-prefix=UNROLL
3
4target 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-S128"
5target triple = "x86_64-apple-macosx10.8.0"
6
7@b = common global [2048 x i32] zeroinitializer, align 16
8@c = common global [2048 x i32] zeroinitializer, align 16
9@a = common global [2048 x i32] zeroinitializer, align 16
10
11; Select VF = 8;
12;CHECK-LABEL: @example1(
13;CHECK: load <4 x i32>
14;CHECK: add nsw <4 x i32>
15;CHECK: store <4 x i32>
16;CHECK: ret void
17
18;UNROLL-LABEL: @example1(
19;UNROLL: load <4 x i32>
20;UNROLL: load <4 x i32>
21;UNROLL: add nsw <4 x i32>
22;UNROLL: add nsw <4 x i32>
23;UNROLL: store <4 x i32>
24;UNROLL: store <4 x i32>
25;UNROLL: ret void
26define void @example1() nounwind uwtable ssp {
27  br label %1
28
29; <label>:1                                       ; preds = %1, %0
30  %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ]
31  %2 = getelementptr inbounds [2048 x i32], [2048 x i32]* @b, i64 0, i64 %indvars.iv
32  %3 = load i32, i32* %2, align 4
33  %4 = getelementptr inbounds [2048 x i32], [2048 x i32]* @c, i64 0, i64 %indvars.iv
34  %5 = load i32, i32* %4, align 4
35  %6 = add nsw i32 %5, %3
36  %7 = getelementptr inbounds [2048 x i32], [2048 x i32]* @a, i64 0, i64 %indvars.iv
37  store i32 %6, i32* %7, align 4
38  %indvars.iv.next = add i64 %indvars.iv, 1
39  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
40  %exitcond = icmp eq i32 %lftr.wideiv, 256
41  br i1 %exitcond, label %8, label %1
42
43; <label>:8                                       ; preds = %1
44  ret void
45}
46
47; Select VF=4 because sext <8 x i1> to <8 x i32> is expensive.
48;CHECK-LABEL: @example10b(
49;CHECK: load <4 x i16>
50;CHECK: sext <4 x i16>
51;CHECK: store <4 x i32>
52;CHECK: ret void
53;UNROLL-LABEL: @example10b(
54;UNROLL: load <4 x i16>
55;UNROLL: load <4 x i16>
56;UNROLL: store <4 x i32>
57;UNROLL: store <4 x i32>
58;UNROLL: ret void
59define void @example10b(i16* noalias nocapture %sa, i16* noalias nocapture %sb, i16* noalias nocapture %sc, i32* noalias nocapture %ia, i32* noalias nocapture %ib, i32* noalias nocapture %ic) nounwind uwtable ssp {
60  br label %1
61
62; <label>:1                                       ; preds = %1, %0
63  %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ]
64  %2 = getelementptr inbounds i16, i16* %sb, i64 %indvars.iv
65  %3 = load i16, i16* %2, align 2
66  %4 = sext i16 %3 to i32
67  %5 = getelementptr inbounds i32, i32* %ia, i64 %indvars.iv
68  store i32 %4, i32* %5, align 4
69  %indvars.iv.next = add i64 %indvars.iv, 1
70  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
71  %exitcond = icmp eq i32 %lftr.wideiv, 1024
72  br i1 %exitcond, label %6, label %1
73
74; <label>:6                                       ; preds = %1
75  ret void
76}
77
78