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121 lines
4.8 KiB
121 lines
4.8 KiB
# RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \
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# RUN: | llvm-dwarfdump - -name local* -regex \
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# RUN: | FileCheck %s
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#
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# Test that the -trim-var-locs option (enabled by default) works correctly.
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# Test directives and comments inline.
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--- |
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i32 @fun() local_unnamed_addr !dbg !7 {
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entry:
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ret i32 0
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "example.c", directory: "/")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 11.0.0"}
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !13, !25}
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!22 = !DISubroutineType(types: !23)
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!23 = !{!10, !10}
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; --- Important metadata ---
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!7 = distinct !DISubprogram(name: "fun", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!24 = distinct !DILexicalBlock(scope: !7, file: !1, line: 9, column: 3)
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!14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3)
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!12 = !DILocalVariable(name: "locala", scope: !7, file: !1, line: 1, type: !10)
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!13 = !DILocalVariable(name: "localb", scope: !14, file: !1, line: 2, type: !10)
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!25 = !DILocalVariable(name: "localc", scope: !24, file: !1, line: 3, type: !10)
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!15 = !DILocation(line: 1, column: 0, scope: !7)
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!18 = !DILocation(line: 2, column: 1, scope: !14)
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!26 = !DILocation(line: 3, column: 1, scope: !24)
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...
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---
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name: fun
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body: |
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bb.0.entry:
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; This is the scope and variable structure:
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; int fun() { // scope fun !7
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; int locala; // scope fun !7, var locala !12, debug-location !15
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; { int localb; } // scope fun:block !14, var localb !13, debug-location !18
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; { int localc; } // scope fun:block !24, var localc !25, debug-location !26
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; }
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;
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; (1) Check that a variable location range found in implied scope fun !7 is
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; not trimmed.
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;
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location
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; CHECK-NEXT: DW_OP_reg0 RAX
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; CHECK-NEXT: DW_AT_name ("locala")
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;
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; scope fun !7 is implied as we're in function fun and haven't seen a debug-location
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$eax = MOV32ri 0
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; locala range 1 start in implicit scope fun !7
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DBG_VALUE $eax, $noreg, !12, !DIExpression(), debug-location !15
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$edi = MOV32ri 1
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; locala range 1 clobber in implicit scope fun !7
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$eax = MOV32ri 2
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; scope fun !7 explicit start
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$edi = MOV32ri 3, debug-location !15
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; (2) Check that a variable location range found outside lexical block is
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; trimmed. See check directives for (3).
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;
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; localb range 1 start in scope fun !7 (outside block !14).
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DBG_VALUE $eax, $noreg, !13, !DIExpression(), debug-location !18
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; localb range 1 clobber in scope fun !7
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$edi = MOV32ri 4, debug-location !15
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; (3) Check that a variable location range which overlaps the entire lexical
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; block is not trimmed.
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;
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI)
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; CHECK-NEXT: DW_AT_name ("localb")
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;
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; localb range 2 clobber in scope fun !7 (outside block !14)
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DBG_VALUE $edi, $noreg, !13, !DIExpression(), debug-location !18
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; scope block !14 start (and only instruction)
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$edi = MOV32ri 5, debug-location !18
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; (4) Check that a variable location range in scope fun !7 (outside block
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; !14) is trimmed. See check directives for (3).
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;
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; localb range 3 starts after scope !14 (prev instr is last in scope)
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DBG_VALUE $rax, $noreg, !13, !DIExpression(), debug-location !18
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; scope block !14 end
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$edi = MOV32ri 6, debug-location !15
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; (5) Check that a variable location range found between disjoint scope
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; ranges is trimmed.
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;
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; CHECK: DW_TAG_variable
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; CHECK-NOT: DW_AT_location
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; CHECK-NEXT: DW_AT_name ("localc")
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;
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; scope fun !7
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$edi = MOV32ri 6, debug-location !15
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; scope block !24 start and end range 1
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$edi = MOV32ri 7, debug-location !26
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; localc range 1 start in scope !7
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DBG_VALUE $edi, $noreg, !25, !DIExpression(), debug-location !18
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; localc range 1 clobber in scope !7
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$edi = MOV32ri 8, debug-location !15
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; scope block !24 start and end range 2
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$edi = MOV32ri 9, debug-location !26
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; scope fun !7
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RETQ debug-location !15
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...
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