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0eee52640f
This patch implements PR31013 by introducing a
DIGlobalVariableExpression that holds a pair of DIGlobalVariable and
DIExpression.
Currently, DIGlobalVariables holds a DIExpression. This is not the
best way to model this:
(1) The DIGlobalVariable should describe the source level variable,
not how to get to its location.
(2) It makes it unsafe/hard to update the expressions when we call
replaceExpression on the DIGLobalVariable.
(3) It makes it impossible to represent a global variable that is in
more than one location (e.g., a variable with multiple
DW_OP_LLVM_fragment-s). We also moved away from attaching the
DIExpression to DILocalVariable for the same reasons.
<rdar://problem/29250149>
https://llvm.org/bugs/show_bug.cgi?id=31013
Differential Revision: https://reviews.llvm.org/D26769
llvm-svn: 289902
47 lines
2.0 KiB
LLVM
47 lines
2.0 KiB
LLVM
; REQUIRES: object-emission
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; RUN: llc -mtriple=x86_64-linux -O0 -filetype=obj -generate-arange-section < %s | llvm-dwarfdump -debug-dump=aranges - | FileCheck %s
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; RUN: llc -mtriple=x86_64-linux -O0 -filetype=obj -generate-arange-section < %s | llvm-readobj --relocations - | FileCheck --check-prefix=OBJ %s
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; extern int i;
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; template<int *x>
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; struct foo {
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; };
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;
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; foo<&i> f;
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; Check that we only have one arange in this compilation unit (it will be for 'f'), and not an extra one (for 'i' - since it isn't actually defined in this CU)
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; CHECK: Address Range Header
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; CHECK-NEXT: [0x
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; CHECK-NOT: [0x
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; Check that we have a relocation back to the debug_info section from the debug_aranges section
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; OBJ: debug_aranges
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; OBJ-NEXT: R_X86_64_32 .debug_info 0x0
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%struct.foo = type { i8 }
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@f = global %struct.foo zeroinitializer, align 1, !dbg !10
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@i = external global i32
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13}
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!llvm.ident = !{!14}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !9, imports: !2)
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!1 = !DIFile(filename: "simple.cpp", directory: "/tmp/dbginfo")
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!2 = !{}
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!3 = !{!4}
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!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo<&i>", line: 3, size: 8, align: 8, file: !1, elements: !2, templateParams: !5, identifier: "_ZTS3fooIXadL_Z1iEEE")
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!5 = !{!6}
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!6 = !DITemplateValueParameter(tag: DW_TAG_template_value_parameter, name: "x", type: !7, value: i32* @i)
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!7 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !8)
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !{!10}
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!10 = !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "f", line: 6, isLocal: false, isDefinition: true, scope: null, file: !11, type: !4))
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!11 = !DIFile(filename: "simple.cpp", directory: "/tmp/dbginfo")
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!12 = !{i32 2, !"Dwarf Version", i32 4}
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!13 = !{i32 1, !"Debug Info Version", i32 3}
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!14 = !{!"clang version 3.5 "}
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