1; RUN: opt -passes=loop-vectorize -force-vector-width=2 -S < %s | FileCheck %s 2; 3; Confirm that the DebugLoc info for the instructions in the middle block of a 4; vectorized loop are correct. The Cmp and Br instructions should map to the 5; same source lines as the Cmp and Br of the scalar loop. 6 7; CHECK-LABEL: middle.block: 8; CHECK-NEXT: [[CMP:%.*]] = icmp eq {{.*}}!dbg ![[DL:[0-9]+]] 9; CHECK-NEXT: br i1 [[CMP]]{{.*}} !dbg ![[DL]] 10; CHECK: ![[DL]] = !DILocation(line: 6, 11 12; This IR can be generated by running: 13; clang -g -O2 -emit-llvm -S -mllvm -opt-bisect-limit=68 vec.cpp -o - | opt -passes=loop-vectorize -force-vector-width=2 -S -o vec.ll 14; 15; Where vec.cpp contains: 16; 17; extern int x; 18; extern int y; 19; void a() { 20; const int len = x; 21; int b[len]; 22; for(int i = 0; i< len; ++i) 23; b[i] = x; 24; 25; y = b[x] + b[x-5]; 26; } 27 28target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 29 30@"?x@@3HA" = external dso_local local_unnamed_addr global i32, align 4 31@"?y@@3HA" = external dso_local local_unnamed_addr global i32, align 4 32 33define dso_local void @"?a@@YAXXZ"() local_unnamed_addr #0 !dbg !8 { 34entry: 35 %0 = load i32, ptr @"?x@@3HA", align 4, !dbg !23, !tbaa !24 36 %1 = zext i32 %0 to i64, !dbg !28 37 %vla = alloca i32, i64 %1, align 16, !dbg !28 38 %cmp10 = icmp sgt i32 %0, 0, !dbg !30 39 br i1 %cmp10, label %for.body.preheader, label %for.cond.cleanup, !dbg !30 40 41for.body.preheader: 42 br label %for.body, !dbg !31 43 44for.cond.cleanup.loopexit: 45 %idxprom1.phi.trans.insert = sext i32 %0 to i64 46 %arrayidx2.phi.trans.insert = getelementptr inbounds i32, ptr %vla, i64 %idxprom1.phi.trans.insert 47 %.pre = load i32, ptr %arrayidx2.phi.trans.insert, align 4, !dbg !33, !tbaa !24 48 br label %for.cond.cleanup, !dbg !33 49 50for.cond.cleanup: 51 %2 = phi i32 [ %.pre, %for.cond.cleanup.loopexit ], [ undef, %entry ], !dbg !33 52 %sub = add nsw i32 %0, -5, !dbg !33 53 %idxprom3 = sext i32 %sub to i64, !dbg !33 54 %arrayidx4 = getelementptr inbounds i32, ptr %vla, i64 %idxprom3, !dbg !33 55 %3 = load i32, ptr %arrayidx4, align 4, !dbg !33, !tbaa !24 56 %add = add nsw i32 %3, %2, !dbg !33 57 store i32 %add, ptr @"?y@@3HA", align 4, !dbg !33, !tbaa !24 58 ret void, !dbg !34 59 60for.body: 61 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ] 62 %arrayidx = getelementptr inbounds i32, ptr %vla, i64 %indvars.iv, !dbg !31 63 store i32 %0, ptr %arrayidx, align 4, !dbg !31, !tbaa !24 64 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !35 65 %exitcond = icmp eq i64 %indvars.iv.next, %1, !dbg !30 66 br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body, !dbg !30, !llvm.loop !36 67} 68 69!llvm.dbg.cu = !{!0} 70!llvm.module.flags = !{!3, !4, !5, !6} 71!llvm.ident = !{!7} 72 73!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git 045b8544fd2c4e14f7e72e0df2bc681d823b0838)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 74!1 = !DIFile(filename: "vec.cpp", directory: "C:\5CUsers\5Cgbhyamso\5Cdev\5Cllvm\5Csamples", checksumkind: CSK_MD5, checksum: "fed997f50117f5514a69caf1c2fb2c49") 75!2 = !{} 76!3 = !{i32 2, !"CodeView", i32 1} 77!4 = !{i32 2, !"Debug Info Version", i32 3} 78!5 = !{i32 1, !"wchar_size", i32 2} 79!6 = !{i32 7, !"PIC Level", i32 2} 80!7 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 045b8544fd2c4e14f7e72e0df2bc681d823b0838)"} 81!8 = distinct !DISubprogram(name: "a", linkageName: "?a@@YAXXZ", scope: !1, file: !1, line: 3, type: !9, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 82!9 = !DISubroutineType(types: !10) 83!10 = !{null} 84!11 = !{!12, !15, !17, !21} 85!12 = !DILocalVariable(name: "len", scope: !8, file: !1, line: 4, type: !13) 86!13 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !14) 87!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 88!15 = !DILocalVariable(name: "__vla_expr0", scope: !8, type: !16, flags: DIFlagArtificial) 89!16 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned) 90!17 = !DILocalVariable(name: "b", scope: !8, file: !1, line: 5, type: !18) 91!18 = !DICompositeType(tag: DW_TAG_array_type, baseType: !14, elements: !19) 92!19 = !{!20} 93!20 = !DISubrange(count: !15) 94!21 = !DILocalVariable(name: "i", scope: !22, file: !1, line: 6, type: !14) 95!22 = distinct !DILexicalBlock(scope: !8, file: !1, line: 6) 96!23 = !DILocation(line: 4, scope: !8) 97!24 = !{!25, !25, i64 0} 98!25 = !{!"int", !26, i64 0} 99!26 = !{!"omnipotent char", !27, i64 0} 100!27 = !{!"Simple C++ TBAA"} 101!28 = !DILocation(line: 5, scope: !8) 102!29 = !DILocation(line: 0, scope: !8) 103!30 = !DILocation(line: 6, scope: !22) 104!31 = !DILocation(line: 7, scope: !32) 105!32 = distinct !DILexicalBlock(scope: !22, file: !1, line: 6) 106!33 = !DILocation(line: 9, scope: !8) 107!34 = !DILocation(line: 10, scope: !8) 108!35 = !DILocation(line: 6, scope: !32) 109!36 = distinct !{!36, !30, !37} 110!37 = !DILocation(line: 7, scope: !22) 111