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  • Dr. Jorrit Fahlke Dr. Jorrit Fahlke jfahl_01
  • Jan Hönig hoenig
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8 authors
  1. Jun 19, 2015
  3. May 22, 2015
    • Faisal Vali's avatar
      "This adds -fconcepts-ts as a cc1 option for enabling the · 5eb75a6b
      Faisal Vali authored 
      in-progress implementation of the Concepts TS. The recommended feature
test macro __cpp_experimental_concepts is set to 1 (as opposed to
201501) to indicate that the feature is enabled, but the
implementation is incomplete.

The link to the Concepts TS in cxx_status is updated to refer to the
PDTS (N4377). Additional changes related to __has_feature and
__has_extension are to follow in a later change.

Relevant tests include:

test/Lexer/cxx-features.cpp

The test file is updated with testing of the C++14 + Concepts TS mode.
The expected behaviour is the same as that of the C++14 modes except
for the case of __cpp_experimental_concepts."

- Hubert Tong.

Being committed for Hubert (as per his understanding with Richard Smith) as we start work on the concepts-ts following our preliminary strategy session earlier today. 

The patch is tiny and seems quite standard.

Thanks Hubert!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@237982 91177308-0d34-0410-b5e6-96231b3b80d8
      5eb75a6b
  5. May 19, 2015
  7. May 14, 2015
  9. May 07, 2015
  11. Apr 21, 2015
  13. Mar 27, 2015
  15. Mar 20, 2015
    • Reid Kleckner's avatar
      C++14: Disable sized deallocation by default due to ABI breakage · 79bcca26
      Reid Kleckner authored 
      There are no widely deployed standard libraries providing sized
deallocation functions, so we have to punt and ask the user if they want
us to use sized deallocation. In the future, when such libraries are
deployed, we can teach the driver to detect them and enable this
feature.

N3536 claimed that a weak thunk from sized to unsized deallocation could
be emitted to avoid breaking backwards compatibility with standard
libraries not providing sized deallocation. However, this approach and
other variations don't work in practice.

With the weak function approach, the thunk has to have default
visibility in order to ensure that it is overridden by other DSOs
providing sized deallocation. Weak, default visibility symbols are
particularly expensive on MachO, so John McCall was considering
disabling this feature by default on Darwin. It also changes behavior
ELF linking behavior, causing certain otherwise unreferenced object
files from an archive to be pulled into the link.

Our second approach was to use an extern_weak function declaration and
do an inline conditional branch at the deletion call site. This doesn't
work because extern_weak only works on MachO if you have some archive
providing the default value of the extern_weak symbol. Arranging to
provide such an archive has the same challenges as providing the symbol
in the standard library. Not to mention that extern_weak doesn't really
work on COFF.

Reviewers: rsmith, rjmccall

Differential Revision: http://reviews.llvm.org/D8467

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232788 91177308-0d34-0410-b5e6-96231b3b80d8
      79bcca26
  17. Mar 11, 2015
  19. Mar 09, 2015
  21. Mar 06, 2015
  23. Feb 26, 2015
  25. Feb 22, 2015
  27. Feb 21, 2015
  29. Feb 19, 2015
  31. Feb 14, 2015
  33. Feb 09, 2015
  35. Jan 28, 2015
  37. Jan 27, 2015
  39. Jan 14, 2015
  41. Dec 24, 2014
  43. Dec 19, 2014
  45. Dec 17, 2014
  47. Nov 27, 2014
  49. Nov 26, 2014
  51. Nov 14, 2014
  53. Nov 12, 2014
  55. Nov 08, 2014