90 lines
3.7 KiB
LLVM
90 lines
3.7 KiB
LLVM
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; RUN: llc -dwarf-version=5 -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
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; RUN: llvm-dwarfdump -v %t | FileCheck %s
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; Make sure we don't generate a duplicate DW_AT_rnglists_base attribute in the CU DIE
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; when more than one range list is emitted.
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; From the source:
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;
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; void f1();
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; void f2() {
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; f1();
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; {
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; bool b;
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; f1();
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; f1();
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; }
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; }
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; __attribute__((section(".text.foo"))) void f3() { }
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; Compile with clang -gwarf5 -S -emit-llvm
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; and change the resulting IR to move the first call to f1() to between
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; the second and the third call. This, along with the dbg.declare instruction
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; for the variable b, creates a gap in the code range for the nested lexical
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; scope that is b's immediate parent scope. A range list is emitted for that scope.
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;
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; In addition, the placement of f3() in a different section forces a
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; rangelist to be emitted for the CU instead of simply using low/high pc
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; attributes.
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_compile_unit
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; Make sure we have 2 CU ranges.
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; CHECK: DW_AT_ranges
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; CHECK-NEXT: [0x{{[0-9a-f]+, 0x[0-9a-f]+}}) ".text"
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; CHECK-NEXT: [0x{{[0-9a-f]+, 0x[0-9a-f]+}}) ".text.foo"
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; We should not see any duplicate DW_AT_rnglists_base attributes.
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; CHECK: DW_AT_rnglists_base [DW_FORM_sec_offset] (0x0000000c)
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; CHECK-NOT: DW_AT_rnglists_base
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;
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; Make sure we see 2 ranges in the lexical block DIE.
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; CHECK: DW_TAG_lexical_block
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_ranges
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; CHECK-NEXT: [0x{{[0-9a-f]+, 0x[0-9a-f]+}}) ".text"
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; CHECK-NEXT: [0x{{[0-9a-f]+, 0x[0-9a-f]+}}) ".text"
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define dso_local void @_Z2f2v() !dbg !7 {
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entry:
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%b = alloca i8, align 1
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call void @llvm.dbg.declare(metadata i8* %b, metadata !11, metadata !DIExpression()), !dbg !14
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call void @_Z2f1v(), !dbg !15
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; The following call has been moved here from right after the alloca
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call void @_Z2f1v(), !dbg !10
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call void @_Z2f1v(), !dbg !16
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ret void, !dbg !17
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}
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declare dso_local void @_Z2f1v()
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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define dso_local void @_Z2f3v() section ".text.foo" !dbg !18 {
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entry:
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ret void, !dbg !19
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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_C_plus_plus, file: !1, producer: "clang version 7.0.0 (trunk 337837)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "t3.cpp", directory: "/home/test/rangelists", checksumkind: CSK_MD5, checksum: "1ba81b564a832caa8114cd008c199048")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 5}
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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 7.0.0 (trunk 337837)"}
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!7 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !DILocation(line: 3, column: 3, scope: !7)
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!11 = !DILocalVariable(name: "b", scope: !12, file: !1, line: 5, type: !13)
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!12 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3)
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!13 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
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!14 = !DILocation(line: 5, column: 10, scope: !12)
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!15 = !DILocation(line: 6, column: 5, scope: !12)
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!16 = !DILocation(line: 7, column: 5, scope: !12)
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!17 = !DILocation(line: 9, column: 1, scope: !7)
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!18 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !1, file: !1, line: 10, type: !8, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!19 = !DILocation(line: 10, column: 51, scope: !18)
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