1 ; RUN: llc -mtriple=x86_64-linux-gnu -filetype=obj -o - %s | llvm-dwarfdump -debug-loc - | FileCheck %s 2 3 ; The test inlines the function F four times, with each inlined variable for 4 ; "i4" sharing the same virtual register. This means the live interval of the 5 ; register spans all of the inlined callsites, extending beyond the lexical 6 ; scope of each. Later during register allocation the live interval is split 7 ; into multiple intervals. Check that this does not generate multiple entries 8 ; within the debug location (see PR33730). 9 ; 10 ; Generated from: 11 ; 12 ; extern int foobar(int, int, int, int, int); 13 ; 14 ; int F(int i1, int i2, int i3, int i4, int i5) { 15 ; return foobar(i1, i2, i3, i4, i5); 16 ; } 17 ; 18 ; int foo(int a, int b, int c, int d, int e) { 19 ; return F(a,b,c,d,e) + 20 ; F(a,b,c,d,e) + 21 ; F(a,b,c,d,e) + 22 ; F(a,b,c,d,e); 23 ; } 24 25 ; CHECK: .debug_loc contents: 26 ; CHECK-NEXT: 0x00000000: 27 ; We currently emit an entry for the function prologue, too, which could be optimized away. 28 ; CHECK: [0x000000000000001f, 0x000000000000003c): DW_OP_reg3 RBX 29 ; We should only have one entry inside the function. 30 ; CHECK-NOT: : 31 32 declare i32 @foobar(i32, i32, i32, i32, i32) 33 34 define i32 @foo(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) !dbg !25 { 35 entry: 36 tail call void @llvm.dbg.value(metadata i32 %d, i64 0, metadata !15, metadata !17) #3, !dbg !41 37 %call.i = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !43 38 %call.i21 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !50 39 %add = add nsw i32 %call.i21, %call.i, !dbg !51 40 %call.i22 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !58 41 %add3 = add nsw i32 %add, %call.i22, !dbg !59 42 %call.i23 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !66 43 %add5 = add nsw i32 %add3, %call.i23, !dbg !67 44 ret i32 %add5, !dbg !68 45 } 46 47 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) 48 49 !llvm.dbg.cu = !{!0} 50 !llvm.module.flags = !{!3, !4, !5} 51 !llvm.ident = !{!6} 52 53 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 308976)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 54 !1 = !DIFile(filename: "foo.c", directory: "") 55 !2 = !{} 56 !3 = !{i32 2, !"Dwarf Version", i32 4} 57 !4 = !{i32 2, !"Debug Info Version", i32 3} 58 !5 = !{i32 1, !"wchar_size", i32 4} 59 !6 = !{!"clang version 6.0.0 (trunk 308976)"} 60 !7 = distinct !DISubprogram(name: "F", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) 61 !8 = !DISubroutineType(types: !9) 62 !9 = !{!10, !10, !10, !10, !10, !10} 63 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 64 !11 = !{!15} 65 !15 = !DILocalVariable(name: "i4", arg: 4, scope: !7, file: !1, line: 3, type: !10) 66 !17 = !DIExpression() 67 !25 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 7, type: !8, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !26) 68 !26 = !{} 69 !38 = distinct !DILocation(line: 8, column: 10, scope: !25) 70 !41 = !DILocation(line: 3, column: 35, scope: !7, inlinedAt: !38) 71 !43 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !38) 72 !45 = distinct !DILocation(line: 9, column: 10, scope: !25) 73 !50 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !45) 74 !51 = !DILocation(line: 8, column: 23, scope: !25) 75 !53 = distinct !DILocation(line: 10, column: 10, scope: !25) 76 !58 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !53) 77 !59 = !DILocation(line: 9, column: 23, scope: !25) 78 !61 = distinct !DILocation(line: 11, column: 10, scope: !25) 79 !66 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !61) 80 !67 = !DILocation(line: 10, column: 23, scope: !25) 81 !68 = !DILocation(line: 8, column: 3, scope: !25) 82
