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