1# RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \ 2# RUN: | llvm-dwarfdump - -name local* -regex \ 3# RUN: | FileCheck %s 4# 5# Test that the -trim-var-locs option (enabled by default) works correctly. 6# Test directives and comments inline. 7 8--- | 9 target triple = "x86_64-unknown-linux-gnu" 10 define dso_local i32 @fun() local_unnamed_addr !dbg !7 { 11 entry: 12 ret i32 0 13 } 14 15 !llvm.dbg.cu = !{!0} 16 !llvm.module.flags = !{!3, !4, !5} 17 !llvm.ident = !{!6} 18 19 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) 20 !1 = !DIFile(filename: "example.c", directory: "/") 21 !2 = !{} 22 !3 = !{i32 7, !"Dwarf Version", i32 4} 23 !4 = !{i32 2, !"Debug Info Version", i32 3} 24 !5 = !{i32 1, !"wchar_size", i32 4} 25 !6 = !{!"clang version 11.0.0"} 26 !8 = !DISubroutineType(types: !9) 27 !9 = !{!10} 28 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 29 !11 = !{!12, !13, !25} 30 !22 = !DISubroutineType(types: !23) 31 !23 = !{!10, !10} 32 ; --- Important metadata --- 33 !7 = distinct !DISubprogram(name: "fun", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 34 !24 = distinct !DILexicalBlock(scope: !7, file: !1, line: 9, column: 3) 35 !14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3) 36 !12 = !DILocalVariable(name: "locala", scope: !7, file: !1, line: 1, type: !10) 37 !13 = !DILocalVariable(name: "localb", scope: !14, file: !1, line: 2, type: !10) 38 !25 = !DILocalVariable(name: "localc", scope: !24, file: !1, line: 3, type: !10) 39 !15 = !DILocation(line: 1, column: 0, scope: !7) 40 !18 = !DILocation(line: 2, column: 1, scope: !14) 41 !26 = !DILocation(line: 3, column: 1, scope: !24) 42... 43--- 44name: fun 45body: | 46 bb.0.entry: 47 ; This is the scope and variable structure: 48 ; int fun() { // scope fun !7 49 ; int locala; // scope fun !7, var locala !12, debug-location !15 50 ; { int localb; } // scope fun:block !14, var localb !13, debug-location !18 51 ; { int localc; } // scope fun:block !24, var localc !25, debug-location !26 52 ; } 53 ; 54 ; (1) Check that a variable location range found in implied scope fun !7 is 55 ; not trimmed. 56 ; 57 ; CHECK: DW_TAG_variable 58 ; CHECK-NEXT: DW_AT_location 59 ; CHECK-NEXT: DW_OP_reg0 RAX 60 ; CHECK-NEXT: DW_AT_name ("locala") 61 ; 62 ; scope fun !7 is implied as we're in function fun and haven't seen a debug-location 63 $eax = MOV32ri 0 64 ; locala range 1 start in implicit scope fun !7 65 DBG_VALUE $eax, $noreg, !12, !DIExpression(), debug-location !15 66 $edi = MOV32ri 1 67 ; locala range 1 clobber in implicit scope fun !7 68 $eax = MOV32ri 2 69 ; scope fun !7 explicit start 70 $edi = MOV32ri 3, debug-location !15 71 72 ; (2) Check that a variable location range found outside lexical block is 73 ; trimmed. See check directives for (3). 74 ; 75 ; localb range 1 start in scope fun !7 (outside block !14). 76 DBG_VALUE $eax, $noreg, !13, !DIExpression(), debug-location !18 77 ; localb range 1 clobber in scope fun !7 78 $edi = MOV32ri 4, debug-location !15 79 80 ; (3) Check that a variable location range which overlaps the entire lexical 81 ; block is not trimmed. 82 ; 83 ; CHECK: DW_TAG_variable 84 ; CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI) 85 ; CHECK-NEXT: DW_AT_name ("localb") 86 ; 87 ; localb range 2 clobber in scope fun !7 (outside block !14) 88 DBG_VALUE $edi, $noreg, !13, !DIExpression(), debug-location !18 89 ; scope block !14 start (and only instruction) 90 $edi = MOV32ri 5, debug-location !18 91 92 ; (4) Check that a variable location range in scope fun !7 (outside block 93 ; !14) is trimmed. See check directives for (3). 94 ; 95 ; localb range 3 starts after scope !14 (prev instr is last in scope) 96 DBG_VALUE $rax, $noreg, !13, !DIExpression(), debug-location !18 97 ; scope block !14 end 98 $edi = MOV32ri 6, debug-location !15 99 100 ; (5) Check that a variable location range found between disjoint scope 101 ; ranges is trimmed. 102 ; 103 ; CHECK: DW_TAG_variable 104 ; CHECK-NOT: DW_AT_location 105 ; CHECK-NEXT: DW_AT_name ("localc") 106 ; 107 ; scope fun !7 108 $edi = MOV32ri 6, debug-location !15 109 ; scope block !24 start and end range 1 110 $edi = MOV32ri 7, debug-location !26 111 ; localc range 1 start in scope !7 112 DBG_VALUE $edi, $noreg, !25, !DIExpression(), debug-location !18 113 ; localc range 1 clobber in scope !7 114 $edi = MOV32ri 8, debug-location !15 115 ; scope block !24 start and end range 2 116 $edi = MOV32ri 9, debug-location !26 117 118 ; scope fun !7 119 RETQ debug-location !15 120... 121