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1; RUN: opt < %s -passes=loop-vectorize,transform-warning -force-vector-width=4 -S 2>&1 | FileCheck %s2; RUN: opt < %s -passes=loop-vectorize,transform-warning -force-vector-width=1 -S 2>&1 | FileCheck %s -check-prefix=NOANALYSIS3; RUN: opt < %s -passes=loop-vectorize,transform-warning -force-vector-width=4 -pass-remarks-missed='loop-vectorize' -S 2>&1 | FileCheck %s -check-prefix=MOREINFO4 5; CHECK-NOT: loop not vectorized: loop contains a switch statement6; 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 ordering7 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 ordering10 11; MOREINFO-NOT: remark12 13; CHECK: _Z11test_switchPii14; CHECK: vector.body:15; CHECK: ret16 17target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"18 19; Function Attrs: nounwind optsize ssp uwtable20define void @_Z11test_switchPii(ptr nocapture %A, i32 %Length) #0 !dbg !4 {21entry:22 %cmp18 = icmp sgt i32 %Length, 0, !dbg !1023 br i1 %cmp18, label %for.body.preheader, label %for.end, !dbg !10, !llvm.loop !1224 25for.body.preheader: ; preds = %entry26 br label %for.body, !dbg !1427 28for.body: ; preds = %for.body.preheader, %for.inc29 %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.body.preheader ]30 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !1431 %0 = load i32, ptr %arrayidx, align 4, !dbg !14, !tbaa !1632 switch i32 %0, label %for.inc [33 i32 0, label %sw.bb34 i32 1, label %sw.bb335 ], !dbg !1436 37sw.bb: ; preds = %for.body38 %1 = trunc i64 %indvars.iv to i32, !dbg !2039 %mul = shl nsw i32 %1, 1, !dbg !2040 br label %for.inc, !dbg !2241 42sw.bb3: ; preds = %for.body43 %2 = trunc i64 %indvars.iv to i32, !dbg !2344 store i32 %2, ptr %arrayidx, align 4, !dbg !23, !tbaa !1645 br label %for.inc, !dbg !2346 47for.inc: ; preds = %sw.bb3, %for.body, %sw.bb48 %storemerge = phi i32 [ %mul, %sw.bb ], [ 0, %for.body ], [ 0, %sw.bb3 ]49 store i32 %storemerge, ptr %arrayidx, align 4, !dbg !20, !tbaa !1650 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !1051 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !1052 %exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !1053 br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !10, !llvm.loop !1254 55for.end.loopexit: ; preds = %for.inc56 br label %for.end57 58for.end: ; preds = %for.end.loopexit, %entry59 ret void, !dbg !2460}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