This implements support for allowing {} to consistently zero initialize
objects. We already supported most of this work as a GNU extension, but
the C2x feature goes beyond what the GNU extension allowed.
The changes in this patch are:
* Removed the -Wgnu-empty-initializer warning group. The extension is
now a C2x extension warning instead. Note that use of
`-Wno-gnu-empty-initializer seems` to be quite low in the wild
(https://sourcegraph.com/search?q=context%3Aglobal+-file%3A.*test.*+%22-Wno-gnu-empty-initializer%22&patternType=standard&sm=1&groupBy=repo
which currently only gives 8 hits total), so this is not expected to
be an overly disruptive change. But I'm adding the clang vendors
review group just in case this expectation is wrong.
* Reworded the diagnostic wording to be about a C2x extension, added a
pre-C2x compat warning.
* Allow {} to zero initialize a VLA
This functionality is exposed as an extension in all older C modes
(same as the GNU extension was), but does *not* allow the extension for
VLA initialization in C++ due to concern about handling non-trivially
constructible types.
Differential Revision: https://reviews.llvm.org/D147349
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,
void func();
becomes
void func(void);
This is the second batch of tests being updated (there are a significant
number of other tests left to be updated).
flexible array member, so long as the flexibility array member is
either not initialized or is initialized with an empty initializer
list. Fixes <rdar://problem/8540437>.
llvm-svn: 116647
- 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
braces. We now build the appropriate fully-structured initializer list
for such things. Per PR3618, verified that we're getting the right
code generation.
llvm-svn: 67353
extension. The interaction with designated initializers is a
bit... interesting... but we follow GNU's lead and don't permit too
much crazy code in this area.
Also, make the "excess initializers" error message a bit more
informative.
Addresses PR2561: http://llvm.org/bugs/show_bug.cgi?id=2561
llvm-svn: 63785
