1; RUN: opt -S -loop-vectorize -dce -instcombine -force-vector-width=2 -force-vector-interleave=2 < %s | FileCheck %s
2
3target 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"
4
5;PR 15830.
6
7;CHECK-LABEL: @foo(
8; When scalarizing stores we need to preserve the original order.
9; Make sure that we are extracting in the correct order (0101, and not 0011).
10;CHECK: extractelement <2 x i64> {{.*}}, i32 0
11;CHECK: extractelement <2 x i64> {{.*}}, i32 1
12;CHECK: extractelement <2 x i64> {{.*}}, i32 0
13;CHECK: extractelement <2 x i64> {{.*}}, i32 1
14;CHECK: store
15;CHECK: store
16;CHECK: store
17;CHECK: store
18;CHECK: ret
19
20define i32 @foo(i32* nocapture %A) {
21entry:
22  br label %for.body
23
24for.body:
25  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
26  %0 = shl nsw i64 %indvars.iv, 2
27  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %0
28  store i32 4, i32* %arrayidx, align 4
29  %indvars.iv.next = add i64 %indvars.iv, 1
30  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
31  %exitcond = icmp eq i32 %lftr.wideiv, 10000
32  br i1 %exitcond, label %for.end, label %for.body
33
34for.end:
35  ret i32 undef
36}
37
38
39