mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-25 21:36:05 +00:00
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.
39 lines
1.8 KiB
C++
39 lines
1.8 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unk-unk -o - -emit-llvm -debug-info-kind=standalone -gtemplate-alias %s -gsimple-template-names=simple \
|
|
// RUN: | FileCheck %s
|
|
|
|
//// Check that -gtemplate-alias causes DW_TAG_template_alias emission for
|
|
//// template aliases with default parameter values. See template-alias.cpp for
|
|
//// more template alias tests.
|
|
//// FIXME: We currently do not emit defaulted arguments.
|
|
|
|
template<typename T>
|
|
struct X {
|
|
char m;
|
|
};
|
|
|
|
template<typename T>
|
|
struct Y {
|
|
char n;
|
|
};
|
|
|
|
template <typename NonDefault, template <typename C> class T = Y, int I = 5, typename... Ts>
|
|
using A = X<NonDefault>;
|
|
|
|
//// We should be able to emit type alias metadata which describes all the
|
|
//// values, including the defaulted parameters and empty parameter pack.
|
|
A<int> a;
|
|
|
|
// CHECK: !DIDerivedType(tag: DW_TAG_template_alias, name: "A", file: ![[#]], line: [[#]], baseType: ![[baseType:[0-9]+]], extraData: ![[extraData:[0-9]+]])
|
|
// CHECK: ![[baseType]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "X",
|
|
// CHECK: ![[int:[0-9]+]] = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
// CHECK: ![[extraData]] = !{![[NonDefault:[0-9]+]]}
|
|
// CHECK: ![[NonDefault]] = !DITemplateTypeParameter(name: "NonDefault", type: ![[int]])
|
|
|
|
//// FIXME: Ideally, we would describe the deafulted args, like this:
|
|
// : ![[extraData]] = !{![[NonDefault:[0-9]+]], ![[T:[0-9]+]], ![[I:[0-9]+]], ![[Ts:[0-9]+]]}
|
|
// : ![[NonDefault]] = !DITemplateTypeParameter(name: "NonDefault", type: ![[int]])
|
|
// : ![[T]] = !DITemplateValueParameter(tag: DW_TAG_GNU_template_template_param, name: "T", defaulted: true, value: !"Y")
|
|
// : ![[I]] = !DITemplateValueParameter(name: "I", type: ![[int]], defaulted: true, value: i32 5)
|
|
// : ![[Ts]] = !DITemplateValueParameter(tag: DW_TAG_GNU_template_parameter_pack, name: "Ts", value: ![[types:[0-9]+]])
|
|
// : ![[types]] = !{}
|