1 ; RUN: opt < %s -loop-vectorize -force-vector-width=4 -S 2>&1 | FileCheck %s 2 ; RUN: opt < %s -loop-vectorize -force-vector-width=1 -S 2>&1 | FileCheck %s -check-prefix=NOANALYSIS 3 ; RUN: opt < %s -loop-vectorize -force-vector-width=4 -pass-remarks-missed='loop-vectorize' -S 2>&1 | FileCheck %s -check-prefix=MOREINFO 4 5 ; CHECK: remark: source.cpp:4:5: loop not vectorized: loop contains a switch statement 6 ; CHECK: warning: source.cpp:4:5: loop not vectorized: failed explicitly specified loop vectorization 7 8 ; NOANALYSIS-NOT: remark: {{.*}} 9 ; NOANALYSIS: warning: source.cpp:4:5: loop not interleaved: failed explicitly specified loop interleaving 10 11 ; MOREINFO: remark: source.cpp:4:5: loop not vectorized: loop contains a switch statement 12 ; MOREINFO: remark: source.cpp:4:5: loop not vectorized: use -Rpass-analysis=loop-vectorize for more info (Force=true, Vector Width=4) 13 ; MOREINFO: warning: source.cpp:4:5: loop not vectorized: failed explicitly specified loop vectorization 14 15 ; CHECK: _Z11test_switchPii 16 ; CHECK-NOT: x i32> 17 ; CHECK: ret 18 19 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 20 21 ; Function Attrs: nounwind optsize ssp uwtable 22 define void @_Z11test_switchPii(i32* nocapture %A, i32 %Length) #0 !dbg !4 { 23 entry: 24 %cmp18 = icmp sgt i32 %Length, 0, !dbg !10 25 br i1 %cmp18, label %for.body.preheader, label %for.end, !dbg !10, !llvm.loop !12 26 27 for.body.preheader: ; preds = %entry 28 br label %for.body, !dbg !14 29 30 for.body: ; preds = %for.body.preheader, %for.inc 31 %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.body.preheader ] 32 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !14 33 %0 = load i32, i32* %arrayidx, align 4, !dbg !14, !tbaa !16 34 switch i32 %0, label %for.inc [ 35 i32 0, label %sw.bb 36 i32 1, label %sw.bb3 37 ], !dbg !14 38 39 sw.bb: ; preds = %for.body 40 %1 = trunc i64 %indvars.iv to i32, !dbg !20 41 %mul = shl nsw i32 %1, 1, !dbg !20 42 br label %for.inc, !dbg !22 43 44 sw.bb3: ; preds = %for.body 45 %2 = trunc i64 %indvars.iv to i32, !dbg !23 46 store i32 %2, i32* %arrayidx, align 4, !dbg !23, !tbaa !16 47 br label %for.inc, !dbg !23 48 49 for.inc: ; preds = %sw.bb3, %for.body, %sw.bb 50 %storemerge = phi i32 [ %mul, %sw.bb ], [ 0, %for.body ], [ 0, %sw.bb3 ] 51 store i32 %storemerge, i32* %arrayidx, align 4, !dbg !20, !tbaa !16 52 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10 53 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !10 54 %exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !10 55 br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !10, !llvm.loop !12 56 57 for.end.loopexit: ; preds = %for.inc 58 br label %for.end 59 60 for.end: ; preds = %for.end.loopexit, %entry 61 ret void, !dbg !24 62 } 63 64 attributes #0 = { nounwind } 65 66 !llvm.dbg.cu = !{!0} 67 !llvm.module.flags = !{!7, !8} 68 !llvm.ident = !{!9} 69 70 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0", isOptimized: true, runtimeVersion: 6, emissionKind: 2, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 71 !1 = !DIFile(filename: "source.cpp", directory: ".") 72 !2 = !{} 73 !3 = !{!4} 74 !4 = distinct !DISubprogram(name: "test_switch", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) 75 !5 = !DIFile(filename: "source.cpp", directory: ".") 76 !6 = !DISubroutineType(types: !2) 77 !7 = !{i32 2, !"Dwarf Version", i32 2} 78 !8 = !{i32 2, !"Debug Info Version", i32 3} 79 !9 = !{!"clang version 3.5.0"} 80 !10 = !DILocation(line: 3, column: 8, scope: !11) 81 !11 = distinct !DILexicalBlock(line: 3, column: 3, file: !1, scope: !4) 82 !12 = !{!12, !13, !13} 83 !13 = !{!"llvm.loop.vectorize.enable", i1 true} 84 !14 = !DILocation(line: 4, column: 5, scope: !15) 85 !15 = distinct !DILexicalBlock(line: 3, column: 36, file: !1, scope: !11) 86 !16 = !{!17, !17, i64 0} 87 !17 = !{!"int", !18, i64 0} 88 !18 = !{!"omnipotent char", !19, i64 0} 89 !19 = !{!"Simple C/C++ TBAA"} 90 !20 = !DILocation(line: 6, column: 7, scope: !21) 91 !21 = distinct !DILexicalBlock(line: 4, column: 18, file: !1, scope: !15) 92 !22 = !DILocation(line: 7, column: 5, scope: !21) 93 !23 = !DILocation(line: 9, column: 7, scope: !21) 94 !24 = !DILocation(line: 14, column: 1, scope: !4) 95
