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1; RUN: opt < %s -loop-vectorize -force-vector-width=4 -S -pass-remarks-missed='loop-vectorize' 2>&1 | FileCheck %s
2
3; C/C++ code for control flow test
4; int test(int *A, int Length) {
5;   for (int i = 0; i < Length; i++) {
6;     if (A[i] > 10.0) goto end;
7;     A[i] = 0;
8;   }
9; end:
10;   return 0;
11; }
12
13; CHECK: remark: source.cpp:5:9: loop not vectorized: loop control flow is not understood by vectorizer
14; CHECK: remark: source.cpp:5:9: loop not vectorized: use -Rpass-analysis=loop-vectorize for more info
15
16; CHECK: _Z4testPii
17; CHECK-NOT: x i32>
18; CHECK: ret
19
20target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
21
22; Function Attrs: nounwind optsize ssp uwtable
23define i32 @_Z4testPii(i32* nocapture %A, i32 %Length) #0 !dbg !4 {
24entry:
25  %cmp8 = icmp sgt i32 %Length, 0, !dbg !10
26  br i1 %cmp8, label %for.body.preheader, label %end, !dbg !10
27
28for.body.preheader:                               ; preds = %entry
29  br label %for.body, !dbg !12
30
31for.body:                                         ; preds = %for.body.preheader, %if.else
32  %indvars.iv = phi i64 [ %indvars.iv.next, %if.else ], [ 0, %for.body.preheader ]
33  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !12
34  %0 = load i32, i32* %arrayidx, align 4, !dbg !12, !tbaa !15
35  %cmp1 = icmp sgt i32 %0, 10, !dbg !12
36  br i1 %cmp1, label %end.loopexit, label %if.else, !dbg !12
37
38if.else:                                          ; preds = %for.body
39  store i32 0, i32* %arrayidx, align 4, !dbg !19, !tbaa !15
40  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10
41  %1 = trunc i64 %indvars.iv.next to i32, !dbg !10
42  %cmp = icmp slt i32 %1, %Length, !dbg !10
43  br i1 %cmp, label %for.body, label %end.loopexit, !dbg !10
44
45end.loopexit:                                     ; preds = %if.else, %for.body
46  br label %end
47
48end:                                              ; preds = %end.loopexit, %entry
49  ret i32 0, !dbg !20
50}
51
52attributes #0 = { nounwind }
53
54!llvm.dbg.cu = !{!0}
55!llvm.module.flags = !{!7, !8}
56!llvm.ident = !{!9}
57
58!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0", isOptimized: true, runtimeVersion: 6, emissionKind: LineTablesOnly, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
59!1 = !DIFile(filename: "source.cpp", directory: ".")
60!2 = !{}
61!4 = distinct !DISubprogram(name: "test", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, variables: !2)
62!5 = !DIFile(filename: "source.cpp", directory: ".")
63!6 = !DISubroutineType(types: !2)
64!7 = !{i32 2, !"Dwarf Version", i32 2}
65!8 = !{i32 2, !"Debug Info Version", i32 3}
66!9 = !{!"clang version 3.5.0"}
67!10 = !DILocation(line: 3, column: 8, scope: !11)
68!11 = distinct !DILexicalBlock(line: 3, column: 3, file: !1, scope: !4)
69!12 = !DILocation(line: 5, column: 9, scope: !13)
70!13 = distinct !DILexicalBlock(line: 5, column: 9, file: !1, scope: !14)
71!14 = distinct !DILexicalBlock(line: 4, column: 3, file: !1, scope: !11)
72!15 = !{!16, !16, i64 0}
73!16 = !{!"int", !17, i64 0}
74!17 = !{!"omnipotent char", !18, i64 0}
75!18 = !{!"Simple C/C++ TBAA"}
76!19 = !DILocation(line: 8, column: 7, scope: !13)
77!20 = !DILocation(line: 12, column: 3, scope: !4)
78