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26 Commits

Author SHA1 Message Date
Aaron Ballman 2ed4573e8f Allow standards-based attributes to have leading and trailing underscores. 
This gives library implementers a way to use standards-based attributes that do not conflict with user-defined macros of the same name. Attributes in C2x require this behavior normatively (C2x 6.7.11p4), but there's no reason to not have the same behavior in C++, especially given that such attributes may be used by a C library consumed by a C++ compilation.

llvm-svn: 369033
 2019-08-15 18:35:44 +00:00
Richard Smith dc4ccaaf66 PR19252: Fix crash if alignas is used with an auto-typed variable. Don't check 
the type of the variable until it's known.

llvm-svn: 204887
 2014-03-27 01:22:48 +00:00
Aaron Ballman c698809955 No longer accepting attribute spellings with prefix and suffix underscores except for GNU attributes, or C++11-style attributes in the GNU namespace. This prevents attributes such as __declspec(__dllexport__) or [[__noreturn__]] from being treated as known attributes. 
llvm-svn: 197082
 2013-12-11 22:27:44 +00:00
Eli Friedman 4e28b26589 sizeof(void) etc. should be a hard error in C++. 
PR16872.

llvm-svn: 188324
 2013-08-13 22:26:42 +00:00
Richard Smith 8ca78a16f4 Add -Wdeprecated warnings and fixits for things deprecated in C++11: 
- 'register' storage class
 - dynamic exception specifications

Only the former check is enabled by default for now (the latter might be quite noisy).

llvm-svn: 183881
 2013-06-13 02:02:51 +00:00
Richard Smith 9cf21ae068 Diagnose uses of 'alignof' on functions in -pedantic mode. 
llvm-svn: 177354
 2013-03-18 23:37:25 +00:00
Richard Smith 44c247f0f0 Handle alignas(foo...) pack expansions. 
llvm-svn: 175875
 2013-02-22 08:32:16 +00:00
Richard Smith 9eaab4be04 Fix diagnostic for bad alignas use: it can't be applied to functions. 
llvm-svn: 174160
 2013-02-01 08:25:07 +00:00
Richard Smith 848e1f1960 Implement [dcl.align]p5 and C11 6.7.5/4: alignas cannot underalign. 
Also support alignas(0), which C++11 and C11 require us to ignore.

llvm-svn: 174157
 2013-02-01 08:12:08 +00:00
Richard Smith 7dd5fe5ce6 Produce a diagnostic if alignas is applied to an expression. Neither C11 nor 
C++11 allows that.

llvm-svn: 173789
 2013-01-29 10:18:18 +00:00
Richard Smith 810ad3eb44 Downgrade 'attribute ignored when parsing type' from error to warning, to match 
the diagnostic's warn_ name. Switch some places (notably C++11 attributes)
which really wanted an error over to a different diagnostic. Finally, suppress
the diagnostic entirely for __ptr32, __ptr64 and __w64, to avoid producing
diagnostics in important system headers.

llvm-svn: 173788
 2013-01-29 10:02:16 +00:00
Richard Smith 1dba27cd49 Implement C++11 [dcl.align]p1 and C11 6.7.5/2 rules for alignas and _Alignas. 
llvm-svn: 173779
 2013-01-29 09:02:09 +00:00
Eli Friedman e321795c60 Remove a non-gcc-compatible extension that would apply attributes on declarations without a declarator to structs. Add a warning for ignored attributes. Patch by Michael Han. 
llvm-svn: 146796
 2011-12-17 00:36:09 +00:00
Peter Collingbourne 7d33cd3a2f Fix grammar for C++11 alignment specifiers, and add a few FIXMEs. 
llvm-svn: 142760
 2011-10-23 20:07:52 +00:00
Peter Collingbourne e109a2ca59 Attach class template attributes to the templated CXXRecordDecl, 
instead of silently discarding them.

As a side effect, this improves diagnostics for constexpr class
templates slightly.

llvm-svn: 142755
 2011-10-23 17:07:16 +00:00
Richard Smith 9ca5c42582 Update all tests other than Driver/std.cpp to use -std=c++11 rather than 
-std=c++0x. Patch by Ahmed Charles!

llvm-svn: 141900
 2011-10-13 22:29:44 +00:00
Peter Collingbourne 2f3cf4b158 Add support for alignment-specifiers in C1X and C++11, remove 
support for the C++0x draft [[align]] attribute and add the C1X
standard header file stdalign.h

llvm-svn: 140796
 2011-09-29 18:04:28 +00:00
Richard Smith 3f1b5d077b Implement support for C++0x alias templates. 
llvm-svn: 130953
 2011-05-05 21:57:07 +00:00
Anders Carlsson e30621b626 Get rid of [[hiding]], [[override]] and [[base_check]]. 
llvm-svn: 124087
 2011-01-23 21:33:18 +00:00
Anders Carlsson 19588aa40b Get rid of the [[final]] C++0x attribute. 
llvm-svn: 124083
 2011-01-23 21:07:30 +00:00
John McCall 942687084f __attribute__((aligned(n))) directly specifies the alignment of a declaration 
unless it's a non-packed field, in which case it can only increase the
alignment.  [[align]] effectively works the same way for well-formed code
(because it's ill-formed for [[align]] to decrease alignment ever).

Fixes rdar://problem/8335865

llvm-svn: 116070
 2010-10-08 18:24:19 +00:00
John McCall 85f9055955 When pretty-printing tag types, only print the tag if we're in C (and 
therefore not creating ElaboratedTypes, which are still pretty-printed
with the written tag).

Most of these testcase changes were done by script, so don't feel too
sorry for my fingers.

llvm-svn: 98149
 2010-03-10 11:27:22 +00:00
Daniel Dunbar 8fbe78f6fc Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'. 
- This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

llvm-svn: 91446
 2009-12-15 20:14:24 +00:00
Douglas Gregor e7488b904c Don't automatically assume that an id-expression refers to a 
ValueDecl, because that isn't always the case in ill-formed
code. Diagnose a common mistake (forgetting to provide a template
argument list for a class template, PR5655) and dyn_cast so that we
handle the general problem of referring to a non-value declaration
gracefully.

llvm-svn: 90239
 2009-12-01 16:58:18 +00:00
Alexis Hunt 54a0254887 Parse C++ member check attributes - base_check, hiding, and override. 
The attributes are currently ignored.

llvm-svn: 89837
 2009-11-25 04:20:27 +00:00
Alexis Hunt 96d5c76498 Added rudimentary C++0x attribute support. 
The following attributes are currently supported in C++0x attribute
lists (and in GNU ones as well):
 - align() - semantics believed to be conformant to n3000, except for
   redeclarations and what entities it may apply to
 - final - semantics believed to be conformant to CWG issue 817's proposed
   wording, except for redeclarations
 - noreturn - semantics believed to be conformant to n3000, except for
   redeclarations
 - carries_dependency - currently ignored (this is an optimization hint)

llvm-svn: 89543
 2009-11-21 08:43:09 +00:00