Commit Graph

14 Commits

Author SHA1 Message Date
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
James Y Knight 2fdabb055d Workaround MSVC bug when using TrailingObjects from a template.
MSVC appears to be getting confused as to whether OverloadToken is
supposed to be public or not.

This was discovered by code in Swift, and has been reported to
microsoft by hughbe:
https://connect.microsoft.com/VisualStudio/feedback/details/3116517

Differential Revision: https://reviews.llvm.org/D29880

llvm-svn: 296497
2017-02-28 18:05:41 +00:00
Benjamin Kramer b2505005c7 Retire llvm::alignOf in favor of C++11 alignof.
No functionality change intended.

llvm-svn: 284733
2016-10-20 15:02:18 +00:00
Hubert Tong 01a2cb55f1 TrailingObjects::FixedSizeStorage constexpr fixes + tests
Summary:
This change fixes issues with `LLVM_CONSTEXPR` functions and
`TrailingObjects::FixedSizeStorage`. In particular, some of the
functions marked `LLVM_CONSTEXPR` used by `FixedSizeStorage` were not
implemented such that they evaluate successfully as part of a constant
expression despite constant arguments.

This change also implements a more traditional template-meta path to
accommodate MSVC, and adds unit tests for `FixedSizeStorage`.

Drive-by fix: the access control for members of `TrailingObjectsImpl` is
tightened.

Reviewers: faisalv, rsmith, aaron.ballman

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D22668

llvm-svn: 277270
2016-07-30 14:01:00 +00:00
Richard Smith a64e1adf84 Remove TrailingObjects::operator delete. It's still suffering from
compiler-specific issues. Instead, repeat an 'operator delete' definition in
each derived class that is actually deleted, and give up on the static type
safety of an error when sized delete is accidentally used on a type derived
from TrailingObjects.

llvm-svn: 260190
2016-02-09 02:09:16 +00:00
Richard Smith 1b65c3279d Re-commit r259942 (reverted in r260053) with a different workaround for the MSVC bug.
This fixes undefined behavior in C++14 due to the size of the object being
deleted being different from sizeof(dynamic type) when it is allocated with
trailing objects.

MSVC seems to have several bugs around using-declarations changing the access
of a member inherited from a base class, so use forwarding functions instead of
using-declarations to make TrailingObjects::operator delete accessible where
desired.

llvm-svn: 260180
2016-02-09 01:03:42 +00:00
Nico Weber e40dca7285 Revert 259942, r259943, r259948.
The Windows bots have been failing for the last two days, with:

FAILED: C:\PROGRA~2\MICROS~1.0\VC\bin\amd64\cl.exe -c LLVMContextImpl.cpp
D:\buildslave\clang-x64-ninja-win7\llvm\lib\IR\LLVMContextImpl.cpp(137) :
    error C2248: 'llvm::TrailingObjects<llvm::AttributeSetImpl,
                                        llvm::IndexAttrPair>::operator delete' :
        cannot access private member declared in class 'llvm::AttributeSetImpl'
    TrailingObjects.h(298) : see declaration of
        'llvm::TrailingObjects<llvm::AttributeSetImpl,
                               llvm::IndexAttrPair>::operator delete'
    AttributeImpl.h(213) : see declaration of 'llvm::AttributeSetImpl'

llvm-svn: 260053
2016-02-07 20:09:18 +00:00
Richard Smith ebfdf26d93 More workarounds for undefined behavior exposed when compiling in C++14 with
-fsized-deallocation. Disable sized deallocation for all objects derived from
TrailingObjects, as we expect the storage allocated for these objects to be
larger than the size of their dynamic type.

llvm-svn: 259942
2016-02-05 22:32:52 +00:00
Rui Ueyama da00f2fdf4 Update to use new name alignTo().
llvm-svn: 257804
2016-01-14 21:06:47 +00:00
James Y Knight d734aaa4ba [TrailingObjects] Dynamically realign under-aligned trailing objects.
Previously, the code enforced non-decreasing alignment of each trailing
type. However, it's easy enough to allow for realignment as needed, and
thus avoid the developer having to think about the possiblilities for
alignment requirements on all architectures.

(E.g. on Linux/x86, a struct with an int64 member is 4-byte aligned,
while on other 32-bit archs -- and even with other OSes on x86 -- it has
8-byte alignment. This sort of thing is irritating to have to manually
deal with.)

llvm-svn: 256533
2015-12-29 04:00:43 +00:00
Kostya Serebryany 9b9dd84c8e fix leak in a test, make the sanitizer bot green
llvm-svn: 256179
2015-12-21 19:09:01 +00:00
James Y Knight 64390b4238 Rewrite the TrailingObjects template to provide two new features:
- Automatic alignment of the base type for the alignment requirements
   of the trailing types.

 - Support for an arbitrary numbers of trailing types, instead of only
   1 or 2, by using a variadic template implementation.

Upcoming commits to clang will take advantage of both of these features.

Differential Revision: http://reviews.llvm.org/D12439

llvm-svn: 256054
2015-12-18 22:54:37 +00:00
Yaron Keren 051eeca08e Fix Visual C++ error C2248:
'llvm::TrailingObjects<`anonymous-namespace'::Class1,short,llvm::NoTrailingTypeArg>::additionalSizeToAlloc' :
cannot access protected member declared in class
 'llvm::TrailingObjects<`anonymous-namespace'::Class1,short,llvm::NoTrailingTypeArg>'

 I'm not sure how this compiles with gcc.
 Aren't protecteded members accessible only with protected or public inheritance?
 

llvm-svn: 244199
2015-08-06 07:59:26 +00:00
James Y Knight aa365b2fcd Add a TrailingObjects template class.
This is intended to help support the idiom of a class that has some
other objects (or multiple arrays of different types of objects)
appended on the end, which is used quite heavily in clang.

Differential Revision: http://reviews.llvm.org/D11272

llvm-svn: 244164
2015-08-05 22:57:34 +00:00