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.
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
// RUN: %clang -g -gno-template-alias -std=c++11 -S -emit-llvm %s -o - | FileCheck %s
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template<typename T>
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struct foo {
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};
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template<typename T, typename T2 = int>
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struct baz {
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};
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namespace x {
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// splitting these over multiple lines to make sure the right token is used for
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// the location
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template<typename T>
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using
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# 42
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bar
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= foo<T*>;
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}
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// CHECK: !DIGlobalVariable(name: "bi",{{.*}} type: [[BINT:![0-9]+]]
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x::bar<int> bi;
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// CHECK: !DIGlobalVariable(name: "bf",{{.*}} type: [[BFLOAT:![0-9]+]]
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// CHECK: [[BFLOAT]] = !DIDerivedType(tag: DW_TAG_typedef, name: "bar<float>"
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x::bar<float> bf;
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// CHECK: !DIGlobalVariable(name: "bz",{{.*}} type: [[BBAZ:![0-9]+]]
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// CHECK: [[BBAZ]] = !DIDerivedType(tag: DW_TAG_typedef, name: "bar<baz<int> >"
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x::bar<baz<int>> bz;
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using
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// CHECK: !DIGlobalVariable(name: "n",{{.*}} type: [[NARF:![0-9]+]]
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# 142
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narf // CHECK: [[NARF]] = !DIDerivedType(tag: DW_TAG_typedef, name: "narf"
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// CHECK-SAME: line: 142
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= int;
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narf n;
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template <typename T>
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using tv = void;
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// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "tv<int>"
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tv<int> *tvp;
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using v = void;
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// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "v"
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v *vp;
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// CHECK: [[BINT]] = !DIDerivedType(tag: DW_TAG_typedef, name: "bar<int>"
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// CHECK-SAME: line: 42,
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