1; RUN: opt < %s -loop-vectorize -S -pass-remarks-missed='loop-vectorize' -pass-remarks-analysis='loop-vectorize' 2>&1 | FileCheck %s
2
3; CHECK: remark: source.c:2:8: loop not vectorized: store that is conditionally executed prevents vectorization
4
5target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
6target triple = "x86_64-apple-macosx10.9.0"
7
8; Function Attrs: nounwind ssp uwtable
9define void @conditional_store(i32* noalias nocapture %indices) #0 !dbg !4 {
10entry:
11  br label %for.body, !dbg !10
12
13for.body:                                         ; preds = %for.inc, %entry
14  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.inc ]
15  %arrayidx = getelementptr inbounds i32, i32* %indices, i64 %indvars.iv, !dbg !12
16  %0 = load i32, i32* %arrayidx, align 4, !dbg !12, !tbaa !14
17  %cmp1 = icmp eq i32 %0, 1024, !dbg !12
18  br i1 %cmp1, label %if.then, label %for.inc, !dbg !12
19
20if.then:                                          ; preds = %for.body
21  store i32 0, i32* %arrayidx, align 4, !dbg !18, !tbaa !14
22  br label %for.inc, !dbg !18
23
24for.inc:                                          ; preds = %for.body, %if.then
25  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10
26  %exitcond = icmp eq i64 %indvars.iv.next, 4096, !dbg !10
27  br i1 %exitcond, label %for.end, label %for.body, !dbg !10
28
29for.end:                                          ; preds = %for.inc
30  ret void, !dbg !19
31}
32
33attributes #0 = { nounwind }
34
35!llvm.dbg.cu = !{!0}
36!llvm.module.flags = !{!7, !8}
37!llvm.ident = !{!9}
38
39!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.6.0", isOptimized: true, emissionKind: 2, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
40!1 = !DIFile(filename: "source.c", directory: ".")
41!2 = !{}
42!3 = !{!4}
43!4 = distinct !DISubprogram(name: "conditional_store", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
44!5 = !DIFile(filename: "source.c", directory: ".")
45!6 = !DISubroutineType(types: !2)
46!7 = !{i32 2, !"Dwarf Version", i32 2}
47!8 = !{i32 2, !"Debug Info Version", i32 3}
48!9 = !{!"clang version 3.6.0"}
49!10 = !DILocation(line: 2, column: 8, scope: !11)
50!11 = distinct !DILexicalBlock(line: 2, column: 3, file: !1, scope: !4)
51!12 = !DILocation(line: 3, column: 9, scope: !13)
52!13 = distinct !DILexicalBlock(line: 3, column: 9, file: !1, scope: !11)
53!14 = !{!15, !15, i64 0}
54!15 = !{!"int", !16, i64 0}
55!16 = !{!"omnipotent char", !17, i64 0}
56!17 = !{!"Simple C/C++ TBAA"}
57!18 = !DILocation(line: 3, column: 29, scope: !13)
58!19 = !DILocation(line: 4, column: 1, scope: !4)
59