1 # RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \
2 # RUN: | llvm-dwarfdump - -name local* -regex \
5 # Test that the -trim-var-locs option (enabled by default) works correctly.
6 # Test directives and comments inline.
9 target triple = "x86_64-unknown-linux-gnu"
10 define dso_local i32 @fun() local_unnamed_addr !dbg !7 {
16 !llvm.module.flags = !{!3, !4, !5}
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: "/")
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)
28 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
29 !11 = !{!12, !13, !25}
30 !22 = !DISubroutineType(types: !23)
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)
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
54 ; (1) Check that a variable location range found in implied scope fun !7 is
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")
62 ; scope fun !7 is implied as we're in function fun and haven't seen a debug-location
64 ; locala range 1 start in implicit scope fun !7
65 DBG_VALUE $eax, $noreg, !12, !DIExpression(), debug-location !15
67 ; locala range 1 clobber in implicit scope fun !7
69 ; scope fun !7 explicit start
70 $edi = MOV32ri 3, debug-location !15
72 ; (2) Check that a variable location range found outside lexical block is
73 ; trimmed. See check directives for (3).
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
80 ; (3) Check that a variable location range which overlaps the entire lexical
81 ; block is not trimmed.
83 ; CHECK: DW_TAG_variable
84 ; CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI)
85 ; CHECK-NEXT: DW_AT_name ("localb")
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
92 ; (4) Check that a variable location range in scope fun !7 (outside block
93 ; !14) is trimmed. See check directives for (3).
95 ; localb range 3 starts after scope !14 (prev instr is last in scope)
96 DBG_VALUE $rax, $noreg, !13, !DIExpression(), debug-location !18
98 $edi = MOV32ri 6, debug-location !15
100 ; (5) Check that a variable location range found between disjoint scope
103 ; CHECK: DW_TAG_variable
104 ; CHECK-NOT: DW_AT_location
105 ; CHECK-NEXT: DW_AT_name ("localc")
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
119 RETQ debug-location !15