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