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