[all-commits] [llvm/llvm-project] ce6a56: Reland "[lldb] Add support for DW_AT_default_value...

[Michael Buch via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ce6a56e66781eaad11c7285d37c1c410414676de
      https://github.com/llvm/llvm-project/commit/ce6a56e66781eaad11c7285d37c1c410414676de
  Author: Michael Buch <michaelbuch12 at gmail.com>
  Date:   2023-01-27 (Fri, 27 Jan 2023)

  Changed paths:
    M lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
    M lldb/test/API/commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py
    M lldb/test/API/commands/expression/import-std-module/retry-with-std-module/TestRetryWithStdModule.py
    M lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/shared_ptr/TestDataFormatterLibcxxSharedPtr.py
    M lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
    M lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
    M lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unique_ptr/TestDataFormatterLibcxxUniquePtr.py
    M lldb/unittests/SymbolFile/DWARF/CMakeLists.txt
    M lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
    A lldb/unittests/SymbolFile/DWARF/Inputs/DW_AT_default_value-test.yaml

  Log Message:
  -----------
  Reland "[lldb] Add support for DW_AT_default_value in template params"

**Summary**

This patch makes LLDB understand the `DW_AT_default_value` on
template argument DIEs. As a result, type summaries will no
longer contain the defaulted template arguments, reducing
noise substantially. E.g.,

Before:
```
(lldb) v nested
(std::vector<std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::allocator<std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator <char> > > > > >) nested = size=0 {}
```

After:
```
(lldb) v nested
(std::vector<std::vector<std::basic_string<char> > >) nested = size=0 {}
```

See discussion in https://reviews.llvm.org/D140423

**Testing**

* Adjust API tests
* Added unit-test

Differential Revision: https://reviews.llvm.org/D141828