1; RUN: opt -basicaa -loop-vectorize -force-vector-interleave=1 -S -mcpu=core-avx2
2
3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-unknown-linux-gnu"
5
6@b = common global [256 x i32] zeroinitializer, align 16
7@a = common global [256 x i32] zeroinitializer, align 16
8
9; unsigned int a[256], b[256];
10; void foo() {
11;  for (i = 0; i < 256; i++) {
12;    if (b[i] > a[i])
13;      a[i] = b[i];
14;  }
15; }
16
17; CHECK-LABEL: foo
18; CHECK: load <8 x i32>
19; CHECK: icmp ugt <8 x i32>
20; CHECK: masked.store
21
22define void @foo() {
23entry:
24  br label %for.body
25
26for.body:                                         ; preds = %for.inc, %entry
27  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.inc ]
28  %arrayidx = getelementptr inbounds [256 x i32], [256 x i32]* @b, i64 0, i64 %indvars.iv
29  %0 = load i32, i32* %arrayidx, align 4
30  %arrayidx2 = getelementptr inbounds [256 x i32], [256 x i32]* @a, i64 0, i64 %indvars.iv
31  %1 = load i32, i32* %arrayidx2, align 4
32  %cmp3 = icmp ugt i32 %0, %1
33  br i1 %cmp3, label %if.then, label %for.inc
34
35if.then:                                          ; preds = %for.body
36  store i32 %0, i32* %arrayidx2, align 4
37  br label %for.inc
38
39for.inc:                                          ; preds = %for.body, %if.then
40  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
41  %exitcond = icmp eq i64 %indvars.iv.next, 256
42  br i1 %exitcond, label %for.end, label %for.body
43
44for.end:                                          ; preds = %for.inc
45  ret void
46}
47