remark flags. For now I'm checking in a copy of the built documentation, but we
can replace this with a placeholder (as we do for the attributes reference
documentation) once we enable building this server-side.
llvm-svn: 281192
provided before trying to print it.
This fixes a segfault that occurs when function printPretty generated by
tablegen tries to print an optional argument of attribute
objc_bridge_related.
rdar://problem/28155469
llvm-svn: 281132
This is for attributes in []-delimited lists preceding a class, like e.g.
`[uuid("...")] class Foo {};` Not used by anything yet, so no behavior change.
Part of https://reviews.llvm.org/D23895
llvm-svn: 280575
Summary:
This attribute specifies expectations about the initialization of static and
thread local variables. Specifically that the variable has a
[constant initializer](http://en.cppreference.com/w/cpp/language/constant_initialization)
according to the rules of [basic.start.static]. Failure to meet this expectation
will result in an error.
Static objects with constant initializers avoid hard-to-find bugs caused by
the indeterminate order of dynamic initialization. They can also be safely
used by other static constructors across translation units.
This attribute acts as a compile time assertion that the requirements
for constant initialization have been met. Since these requirements change
between dialects and have subtle pitfalls it's important to fail fast instead
of silently falling back on dynamic initialization.
```c++
// -std=c++14
#define SAFE_STATIC __attribute__((require_constant_initialization)) static
struct T {
constexpr T(int) {}
~T();
};
SAFE_STATIC T x = {42}; // OK.
SAFE_STATIC T y = 42; // error: variable does not have a constant initializer
// copy initialization is not a constant expression on a non-literal type.
```
This attribute can only be applied to objects with static or thread-local storage
duration.
Reviewers: majnemer, rsmith, aaron.ballman
Subscribers: jroelofs, cfe-commits
Differential Revision: https://reviews.llvm.org/D23385
llvm-svn: 280525
Summary:
This attribute specifies expectations about the initialization of static and
thread local variables. Specifically that the variable has a
[constant initializer](http://en.cppreference.com/w/cpp/language/constant_initialization)
according to the rules of [basic.start.static]. Failure to meet this expectation
will result in an error.
Static objects with constant initializers avoid hard-to-find bugs caused by
the indeterminate order of dynamic initialization. They can also be safely
used by other static constructors across translation units.
This attribute acts as a compile time assertion that the requirements
for constant initialization have been met. Since these requirements change
between dialects and have subtle pitfalls it's important to fail fast instead
of silently falling back on dynamic initialization.
```c++
// -std=c++14
#define SAFE_STATIC __attribute__((require_constant_initialization)) static
struct T {
constexpr T(int) {}
~T();
};
SAFE_STATIC T x = {42}; // OK.
SAFE_STATIC T y = 42; // error: variable does not have a constant initializer
// copy initialization is not a constant expression on a non-literal type.
```
This attribute can only be applied to objects with static or thread-local storage
duration.
Reviewers: majnemer, rsmith, aaron.ballman
Subscribers: jroelofs, cfe-commits
Differential Revision: https://reviews.llvm.org/D23385
llvm-svn: 280516
The oneshot probe only gets executed the first time the probe is hit in the process. For order file generation this is really all we care about.
llvm-svn: 279673
This reverts commit r277487.
Removing the probe predicate was a red herring. It results in more symbols being placed in the final order file, but they are symbols from outside the clang image.
llvm-svn: 277492
Having the dtrace predicate setup to only show probes in clang filters out static initializers executed by dyld, which we do want included in the order files.
llvm-svn: 277487
Dtrace probemod needs to be based on the first argument of the command, not the first argument of the args. This error was introduced a while back when I added support for skipping the driver and invoking cc1 directly.
llvm-svn: 277401
Extend the __declspec(dll*) attribute to cover ObjC interfaces. This was
requested by Microsoft for their ObjC support. Cover both import and export.
This only adds the semantic analysis portion of the support, code-generation
still remains outstanding. Add some basic initial documentation on the
attributes that were previously empty. Tweak the previous tests to use the
relative expected-warnings to make the tests easier to read.
llvm-svn: 275610
After r272599, -DLLVM_BUILD_INSTRUMENTED passes a default argument to
-fprofile-instr-generate. This confuses the perf-helper script because
the runtime emits a note stating that the default is overridden by the
LLVM_PROFILE_FILE environment variable.
Change the perf-helper script s.t it does not treat these notes as
failures.
This isn't a strictly NFC change, but I don't see a simple way to add a
test for it.
llvm-svn: 272695
Create a special visualizer for OpaquePtr<QualType> because the
standard visualizer doesn't work with OpaquePtr<QualType>
due to QualType being heavily dependent on traits to be pointer-like.
Also, created an identical visualizer for UnionOpaquePtr
llvm-svn: 272531
Does a good job with type and non-type template arguments
and lays the groundwork for template template arguments to
visualize well once there is a TemplateName visualizer.
Also fixed what looks like an incorrect comment in the
header for ParsedTemplate.h.
llvm-svn: 272521
Created a visualizer for ActionResult that displayed the validity and the pointer,
but many of them initially displayed poorly. It turns out that the primary culprit
is that LocInfoType is often passed in an action result, but it is not the same
as other types. For example, LocInfoType is not in TypeNodes.def and clang::Type::TypeClass
does not have a LocInfoType enum. After adding a special visualizer for LocInfoType,
the display was more useful
llvm-svn: 272487
Visualizers for DeclAccessPair, UnresolvedSet, and LookupResult. For example,
when combined with LLVM diff D21256 (currently in review), a Lookup set will
show much more naturally in the Locals window something like
Found: {public typename ...Ts}
llvm-svn: 272448
Improved the visualizer for TemplateArgumentList to show type arguments in the DisplayString.
E.g., <double, long>. Added a visualizer for MultiLevelTemplateArgumentList.
I decided to display them by how they would appear in a template with the
(non-existent) template-id's omitted, so the DisplayString naturally presents
as something like <double, long>::<char *>.
llvm-svn: 271944
For pack TemplateArguments, visualize all of the items in the pack
Visualize a TemplateArgumentList as a template argument list. E.g., <int, double>
llvm-svn: 271910
Now it gives the StmtClass of the Expr as well as the type. It's still
a long way from full visualization of expressions, but I have found
that having the class really helps when debugging, so definitely
worth submitting.
llvm-svn: 271866
Previous attempts to rename the IBOutletCollection argument to something
other than "Interface" were undone (r127127 and r139620). Instead of
renaming it, work around this in tablegen, so the public facing getter
can have the usual name of 'getInterface'.
Fixes PR26682
llvm-svn: 271305
Reduce space in empty constructors and between data members and first public section.
Fix some Include What You Use warnings.
Differential revision: http://reviews.llvm.org/D20213
llvm-svn: 269371
Bitsets, and the compiler features they rely on (vtable opt, CFI),
only have visibility within the LTO'd part of the linkage unit. Therefore,
only enable these features for classes with hidden LTO visibility. This
notion is based on object file visibility or (on Windows)
dllimport/dllexport attributes.
We provide the [[clang::lto_visibility_public]] attribute to override the
compiler's LTO visibility inference in cases where the class is defined
in the non-LTO'd part of the linkage unit, or where the ABI supports
calling classes derived from abstract base classes with hidden visibility
in other linkage units (e.g. COM on Windows).
If the cross-DSO CFI mode is enabled, bitset checks are emitted even for
classes with public LTO visibility, as that mode uses a separate mechanism
to cause bitsets to be exported.
This mechanism replaces the whole-program-vtables blacklist, so remove the
-fwhole-program-vtables-blacklist flag.
Because __declspec(uuid()) now implies [[clang::lto_visibility_public]], the
support for the special attr:uuid blacklist entry is removed.
Differential Revision: http://reviews.llvm.org/D18635
llvm-svn: 267784
At the moment almost every lit.site.cfg.in contains two lines comment:
## Autogenerated by LLVM/Clang configuration.
# Do not edit!
The patch adds variable LIT_SITE_CFG_IN_HEADER, that is replaced from
configure_lit_site_cfg with the note and some useful information.
llvm-svn: 266516
Dtrace is implemented to try and minimize performance impact on the process being traced. This results in dtrace dropping samples if it is taking too many CPU resources. Multi-threading dtrace increases the sample drop rate dramatically.
llvm-svn: 266213
This is re-landing r260742. I've reworked the conditionals so that it only hits when targeting Apple platforms with ld64.
Original Summary:
With this change generating clang order files using dtrace uses the following workflow:
cmake <whatever options you want>
ninja generate-order-file
ninja clang
This patch works by setting a default path to the order file (which can be overridden by the user). If the order file doesn't exist during configuration CMake will create an empty one.
CMake then ties up the dependencies between the clang link job and the order file, and generate-order-file overwrites CLANG_ORDER_FILE with the new order file.
llvm-svn: 265864
Richard Smith