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: vectorization is explicitly enabled with width 4 5 6 ; CHECK: _Z11test_switchPii 7 ; CHECK-NOT: x i32> 8 ; CHECK: ret 9 10 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 11 12 ; Function Attrs: nounwind optsize ssp uwtable 13 define void @_Z11test_switchPii(i32* nocapture %A, i32 %Length) #0 { 14 entry: 15 %cmp18 = icmp sgt i32 %Length, 0, !dbg !10 16 br i1 %cmp18, label %for.body.preheader, label %for.end, !dbg !10, !llvm.loop !12 17 18 for.body.preheader: ; preds = %entry 19 br label %for.body, !dbg !14 20 21 for.body: ; preds = %for.body.preheader, %for.inc 22 %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.body.preheader ] 23 %arrayidx = getelementptr inbounds i32* %A, i64 %indvars.iv, !dbg !14 24 %0 = load i32* %arrayidx, align 4, !dbg !14, !tbaa !16 25 switch i32 %0, label %for.inc [ 26 i32 0, label %sw.bb 27 i32 1, label %sw.bb3 28 ], !dbg !14 29 30 sw.bb: ; preds = %for.body 31 %1 = trunc i64 %indvars.iv to i32, !dbg !20 32 %mul = shl nsw i32 %1, 1, !dbg !20 33 br label %for.inc, !dbg !22 34 35 sw.bb3: ; preds = %for.body 36 %2 = trunc i64 %indvars.iv to i32, !dbg !23 37 store i32 %2, i32* %arrayidx, align 4, !dbg !23, !tbaa !16 38 br label %for.inc, !dbg !23 39 40 for.inc: ; preds = %sw.bb3, %for.body, %sw.bb 41 %storemerge = phi i32 [ %mul, %sw.bb ], [ 0, %for.body ], [ 0, %sw.bb3 ] 42 store i32 %storemerge, i32* %arrayidx, align 4, !dbg !20, !tbaa !16 43 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10 44 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !10 45 %exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !10 46 br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !10, !llvm.loop !12 47 48 for.end.loopexit: ; preds = %for.inc 49 br label %for.end 50 51 for.end: ; preds = %for.end.loopexit, %entry 52 ret void, !dbg !24 53 } 54 55 attributes #0 = { nounwind } 56 57 !llvm.dbg.cu = !{!0} 58 !llvm.module.flags = !{!7, !8} 59 !llvm.ident = !{!9} 60 61 !0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 2} 62 !1 = metadata !{metadata !"source.cpp", metadata !"."} 63 !2 = metadata !{} 64 !3 = metadata !{metadata !4} 65 !4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"test_switch", metadata !"test_switch", metadata !"", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i32*, i32)* @_Z11test_switchPii, null, null, metadata !2, i32 1} 66 !5 = metadata !{i32 786473, metadata !1} 67 !6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !2, i32 0, null, null, null} 68 !7 = metadata !{i32 2, metadata !"Dwarf Version", i32 2} 69 !8 = metadata !{i32 2, metadata !"Debug Info Version", i32 1} 70 !9 = metadata !{metadata !"clang version 3.5.0"} 71 !10 = metadata !{i32 3, i32 8, metadata !11, null} 72 !11 = metadata !{i32 786443, metadata !1, metadata !4, i32 3, i32 3, i32 0, i32 0} 73 !12 = metadata !{metadata !12, metadata !13, metadata !13} 74 !13 = metadata !{metadata !"llvm.loop.vectorize.enable", i1 true} 75 !14 = metadata !{i32 4, i32 5, metadata !15, null} 76 !15 = metadata !{i32 786443, metadata !1, metadata !11, i32 3, i32 36, i32 0, i32 1} 77 !16 = metadata !{metadata !17, metadata !17, i64 0} 78 !17 = metadata !{metadata !"int", metadata !18, i64 0} 79 !18 = metadata !{metadata !"omnipotent char", metadata !19, i64 0} 80 !19 = metadata !{metadata !"Simple C/C++ TBAA"} 81 !20 = metadata !{i32 6, i32 7, metadata !21, null} 82 !21 = metadata !{i32 786443, metadata !1, metadata !15, i32 4, i32 18, i32 0, i32 2} 83 !22 = metadata !{i32 7, i32 5, metadata !21, null} 84 !23 = metadata !{i32 9, i32 7, metadata !21, null} 85 !24 = metadata !{i32 14, i32 1, metadata !4, null} 86
