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1; RUN: opt < %s  -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -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"
4target triple = "x86_64-apple-macosx10.9.0"
5
6; Make sure we vectorize this loop:
7; int foo(float *a, float *b, int n) {
8;   for (int i=0; i<n; ++i)
9;     a[i] = b[i] * 3;
10; }
11
12;CHECK-LABEL: define i32 @foo
13;CHECK: for.body.preheader:
14;CHECK: br i1 %cmp.zero, label %scalar.ph, label %vector.memcheck, !dbg [[BODY_LOC:![0-9]+]]
15;CHECK: vector.memcheck:
16;CHECK: br i1 %memcheck.conflict, label %scalar.ph, label %vector.ph, !dbg [[BODY_LOC]]
17;CHECK: load <4 x float>
18define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp {
19entry:
20  %cmp6 = icmp sgt i32 %n, 0, !dbg !6
21  br i1 %cmp6, label %for.body, label %for.end, !dbg !6
22
23for.body:                                         ; preds = %entry, %for.body
24  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ], !dbg !7
25  %arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv, !dbg !7
26  %0 = load float, float* %arrayidx, align 4, !dbg !7
27  %mul = fmul float %0, 3.000000e+00, !dbg !7
28  %arrayidx2 = getelementptr inbounds float, float* %a, i64 %indvars.iv, !dbg !7
29  store float %mul, float* %arrayidx2, align 4, !dbg !7
30  %indvars.iv.next = add i64 %indvars.iv, 1, !dbg !7
31  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !7
32  %exitcond = icmp eq i32 %lftr.wideiv, %n, !dbg !7
33  br i1 %exitcond, label %for.end, label %for.body, !dbg !7
34
35for.end:                                          ; preds = %for.body, %entry
36  ret i32 undef, !dbg !8
37}
38
39; Make sure that we try to vectorize loops with a runtime check if the
40; dependency check fails.
41
42; CHECK-LABEL: test_runtime_check
43; CHECK:      <4 x float>
44define void @test_runtime_check(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) {
45entry:
46  br label %for.body
47
48for.body:
49  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
50  %ind.sum = add i64 %iv, %offset
51  %arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum
52  %l1 = load float, float* %arr.idx, align 4
53  %ind.sum2 = add i64 %iv, %offset2
54  %arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2
55  %l2 = load float, float* %arr.idx2, align 4
56  %m = fmul fast float %b, %l2
57  %ad = fadd fast float %l1, %m
58  store float %ad, float* %arr.idx, align 4
59  %iv.next = add nuw nsw i64 %iv, 1
60  %exitcond = icmp eq i64 %iv.next, %n
61  br i1 %exitcond, label %loopexit, label %for.body
62
63loopexit:
64  ret void
65}
66
67; CHECK: [[BODY_LOC]] = !DILocation(line: 101, column: 1, scope: !{{.*}})
68
69!llvm.module.flags = !{!0, !1}
70!0 = !{i32 2, !"Dwarf Version", i32 4}
71!1 = !{i32 2, !"Debug Info Version", i32 3}
72
73!2 = !{}
74!3 = !DISubroutineType(types: !2)
75!4 = !DIFile(filename: "test.cpp", directory: "/tmp")
76!5 = distinct !DISubprogram(name: "foo", scope: !4, file: !4, line: 99, type: !3, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
77!6 = !DILocation(line: 100, column: 1, scope: !5)
78!7 = !DILocation(line: 101, column: 1, scope: !5)
79!8 = !DILocation(line: 102, column: 1, scope: !5)
80