1; RUN: opt --passes=licm -S -o - < %s | FileCheck %s 2 3; Building the test case with `clang -O2 -g` the call to 'getInOrder' 4; on line 16 is sunk out of the loop by LICM. 5; According to 'HowToUpdateDebugInfo' the source location of the sunk 6; call should be dropped. 7 8; 1 __attribute__((noinline)) int getInOrder(int Idx) { 9; 2 static int InOrder[] = { 0, 1 }; 10; 3 return InOrder[Idx]; 11; 4 } 12; 5 13; 6 __attribute__((noinline)) int getRandVar(int Idx) { 14; 7 static int RandVars[] = { 4, 4 }; 15; 8 return RandVars[Idx]; 16; 9 } 17; 10 18; 11 int bounce() { 19; 12 int Sum = 0; 20; 13 int Extra = 0; 21; 14 for (int I = 0; I < 2; ++I) { 22; 15 Sum += getRandVar(I); 23; 16 Extra = getInOrder(I); 24; 17 Sum %= 4; 25; 18 } 26; 19 return Sum + Extra; 27; 20 } 28 29; CHECK-LABEL: for.end: 30; CHECK: tail call noundef i32 @getInOrder({{.*}}), !dbg ![[DBG:[0-9]+]] 31; CHECK-DAG: ![[DBG]] = !DILocation(line: 0, scope: ![[SCOPE:[0-9]+]] 32; CHECK-DAG: ![[SCOPE]] = distinct !DISubprogram(name: "bounce", 33 34define noundef i32 @getInOrder(i32 noundef %Idx) #0 !dbg !9 { 35entry: 36 ret i32 2 37} 38 39define noundef i32 @getRandVar(i32 noundef %Idx) #0 !dbg !15 { 40entry: 41 ret i32 4 42} 43 44define noundef i32 @bounce() !dbg !17 { 45entry: 46 br label %for.body, !dbg !20 47 48for.body: ; preds = %entry, %for.body 49 %I.07 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 50 %Sum.06 = phi i32 [ 0, %entry ], [ %rem, %for.body ] 51 %call = tail call noundef i32 @getRandVar(i32 noundef %I.07), !dbg !21 52 %add = add nsw i32 %call, %Sum.06, !dbg !21 53 %call1 = tail call noundef i32 @getInOrder(i32 noundef %I.07), !dbg !22 54 %rem = srem i32 %add, 4, !dbg !23 55 %inc = add nuw nsw i32 %I.07, 1, !dbg !20 56 %cmp = icmp ult i32 %inc, 2, !dbg !20 57 br i1 %cmp, label %for.body, label %for.end, !dbg !20, !llvm.loop !24 58 59for.end: ; preds = %for.body 60 %Sum.0.lcssa = phi i32 [ %rem, %for.body ], !dbg !27 61 %Extra.0.lcssa = phi i32 [ %call1, %for.body ], !dbg !27 62 %add2 = add nsw i32 %Extra.0.lcssa, %Sum.0.lcssa, !dbg !28 63 ret i32 %add2, !dbg !28 64} 65 66attributes #0 = { noinline nounwind willreturn memory(none) } 67 68!llvm.dbg.cu = !{!0} 69!llvm.module.flags = !{!2, !3, !4, !5, !6, !7} 70!llvm.ident = !{!8} 71 72!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 17.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, nameTableKind: None) 73!1 = !DIFile(filename: "test.cpp", directory: "", checksumkind: CSK_MD5, checksum: "cce1594f8ccf16528cd91ee35b0c1fea") 74!2 = !{i32 2, !"CodeView", i32 1} 75!3 = !{i32 2, !"Debug Info Version", i32 3} 76!4 = !{i32 1, !"wchar_size", i32 2} 77!5 = !{i32 8, !"PIC Level", i32 2} 78!6 = !{i32 7, !"uwtable", i32 2} 79!7 = !{i32 1, !"MaxTLSAlign", i32 65536} 80!8 = !{!"clang version 17.0.0"} 81!9 = distinct !DISubprogram(name: "getInOrder", scope: !1, file: !1, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13) 82!10 = !DISubroutineType(types: !11) 83!11 = !{!12, !12} 84!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 85!13 = !{} 86!14 = !DILocation(line: 3, scope: !9) 87!15 = distinct !DISubprogram(name: "getRandVar", scope: !1, file: !1, line: 6, type: !10, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13) 88!16 = !DILocation(line: 8, scope: !15) 89!17 = distinct !DISubprogram(name: "bounce", scope: !1, file: !1, line: 11, type: !18, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13) 90!18 = !DISubroutineType(types: !19) 91!19 = !{!12} 92!20 = !DILocation(line: 14, scope: !17) 93!21 = !DILocation(line: 15, scope: !17) 94!22 = !DILocation(line: 16, scope: !17) 95!23 = !DILocation(line: 17, scope: !17) 96!24 = distinct !{!24, !20, !25, !26} 97!25 = !DILocation(line: 18, scope: !17) 98!26 = !{!"llvm.loop.mustprogress"} 99!27 = !DILocation(line: 0, scope: !17) 100!28 = !DILocation(line: 19, scope: !17) 101