e772a268ef
Fix issue https://github.com/llvm/llvm-project/issues/54624 Add front end flags -gtemplate-alias (also a cc1 flag) and -gno-template-alias to enable/disable usage of the feature. It's enabled by default in the front end for SCE debugger tuning only. GCC emits DW_TAG_typedef for template aliases (as does Clang with this feature disabled), and GDB and LLDB appear not to support DW_TAG_template_alias. The -Xclang option -gsimple-template-names=mangled is treated the same as =full, which is not a regression from current behaviour for template aliases. The current implementation omits defaulted arguments and as a consequence also omits empty parameter packs that come after defaulted arguments. Again, this isn't a regression as the DW_TAG_typedef name doesn't contain defaulted arguments. LLVM support added in https://github.com/llvm/llvm-project/pull/88943 Added template-alias.cpp - Check the metadata construction & interaction with -gsimple-template-names. Added variadic-template-alias.cpp - Check template parameter packs work. Added defaulted-template-alias.cpp - Check defaulted args (don't) work. Modified debug-options.c - Check Clang generates correct cc1 flags.
26 lines
1.2 KiB
C++
26 lines
1.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unk-unk -o - -emit-llvm -debug-info-kind=standalone -gtemplate-alias %s -gsimple-template-names=simple \
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// RUN: | FileCheck %s
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//// Check that -gtemplate-alias causes DW_TAG_template_alias emission for
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//// variadic template aliases. See template-alias.cpp for more template alias
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//// tests.
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template<typename Y, int Z>
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struct X {
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Y m1 = Z;
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};
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template<int I, typename... Ts>
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using A = X<Ts..., I>;
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A<5, int> a;
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// CHECK: !DIDerivedType(tag: DW_TAG_template_alias, name: "A", file: ![[#]], line: [[#]], baseType: ![[baseType:[0-9]+]], extraData: ![[extraData:[0-9]+]])
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// CHECK: ![[baseType]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "X",
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// CHECK: ![[int:[0-9]+]] = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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// CHECK: ![[extraData]] = !{![[I:[0-9]+]], ![[Ts:[0-9]+]]}
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// CHECK: ![[I]] = !DITemplateValueParameter(name: "I", type: ![[int]], value: i32 5)
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// CHECK: ![[Ts]] = !DITemplateValueParameter(tag: DW_TAG_GNU_template_parameter_pack, name: "Ts", value: ![[types:[0-9]+]])
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// CHECK: ![[types]] = !{![[int_template_param:[0-9]+]]}
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// CHECK: ![[int_template_param]] = !DITemplateTypeParameter(type: ![[int]])
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