The Objective-C common-type computation had a few problems that
required a significant rework, including:
- Quadradic behavior when finding the common base type; now it's
linear.
- Keeping around type arguments when computing the common type
between a specialized and an unspecialized type
- Introducing redundant protocol qualifiers.
Part of rdar://problem/6294649. Also fixes rdar://problem/19572837 by
addressing a longstanding bug in
ASTContext::CollectInheritedProtocols().
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241544 91177308-0d34-0410-b5e6-96231b3b80d8
When messaging a method that was defined in an Objective-C class (or
category or extension thereof) that has type parameters, substitute
the type arguments for those type parameters. Similarly, substitute
into property accesses, instance variables, and other references.
This includes general infrastructure for substituting the type
arguments associated with an ObjCObject(Pointer)Type into a type
referenced within a particular context, handling all of the
substitutions required to deal with (e.g.) inheritance involving
parameterized classes. In cases where no type arguments are available
(e.g., because we're messaging via some unspecialized type, id, etc.),
we substitute in the type bounds for the type parameters instead.
Example:
@interface NSSet<T : id<NSCopying>> : NSObject <NSCopying>
- (T)firstObject;
@end
void f(NSSet<NSString *> *stringSet, NSSet *anySet) {
[stringSet firstObject]; // produces NSString*
[anySet firstObject]; // produces id<NSCopying> (the bound)
}
When substituting for the type parameters given an unspecialized
context (i.e., no specific type arguments were given), substituting
the type bounds unconditionally produces type signatures that are too
strong compared to the pre-generics signatures. Instead, use the
following rule:
- In covariant positions, such as method return types, replace type
parameters with “id” or “Class” (the latter only when the type
parameter bound is “Class” or qualified class, e.g,
“Class<NSCopying>”)
- In other positions (e.g., parameter types), replace type
parameters with their type bounds.
- When a specialized Objective-C object or object pointer type
contains a type parameter in its type arguments (e.g.,
NSArray<T>*, but not NSArray<NSString *> *), replace the entire
object/object pointer type with its unspecialized version (e.g.,
NSArray *).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241543 91177308-0d34-0410-b5e6-96231b3b80d8
Objective-C type arguments can be provided in angle brackets following
an Objective-C interface type. Syntactically, this is the same
position as one would provide protocol qualifiers (e.g.,
id<NSCopying>), so parse both together and let Sema sort out the
ambiguous cases. This applies both when parsing types and when parsing
the superclass of an Objective-C class, which can now be a specialized
type (e.g., NSMutableArray<T> inherits from NSArray<T>).
Check Objective-C type arguments against the type parameters of the
corresponding class. Verify the length of the type argument list and
that each type argument satisfies the corresponding bound.
Specializations of parameterized Objective-C classes are represented
in the type system as distinct types. Both specialized types (e.g.,
NSArray<NSString *> *) and unspecialized types (NSArray *) are
represented, separately.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241542 91177308-0d34-0410-b5e6-96231b3b80d8
Produce type parameter declarations for Objective-C type parameters,
and attach lists of type parameters to Objective-C classes,
categories, forward declarations, and extensions as
appropriate. Perform semantic analysis of type bounds for type
parameters, both in isolation and across classes/categories/extensions
to ensure consistency.
Also handle (de-)serialization of Objective-C type parameter lists,
along with sundry other things one must do to add a new declaration to
Clang.
Note that Objective-C type parameters are typedef name declarations,
like typedefs and C++11 type aliases, in support of type erasure.
Part of rdar://problem/6294649.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241541 91177308-0d34-0410-b5e6-96231b3b80d8
Virtual inheritance member pointers are always relative to the vbindex,
even when the member pointer doesn't point into a virtual base. This is
corrected by adjusting the non-virtual offset backwards from the vbptr
back to the top of the most derived class. While we performed this
adjustment when manifesting member pointers as constants or when
performing conversions, we didn't perform the adjustment when mangling
them.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@240453 91177308-0d34-0410-b5e6-96231b3b80d8
While the rest of the Objective-C metadata seems to honor
objc_runtime_name, the encoding strings produced by, e.g., @encode and
property meta, were not. Fixes rdar://problem/21408305.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@239852 91177308-0d34-0410-b5e6-96231b3b80d8
There are 3 cases of defining static const member:
initialized inside the class, not defined outside the class.
initialized inside the class, defined outside the class.
not initialized inside the class, defined outside the class.
Revision r213304 was supposed to fix the linkage problem of case (1), but mistakenly it made case (2) behave the same.
As a result, out-of-line definition of static data member is not handled correctly.
Proposed patch distinguishes between cases (1) and (2) and allows to properly emit static const members under –fms-compatibility option.
This fixes http://llvm.org/PR21164.
Differential Revision: http://reviews.llvm.org/D9850
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With this change, enabling -fmodules-local-submodule-visibility results in name
visibility rules being applied to submodules of the current module in addition
to imported modules (that is, names no longer "leak" between submodules of the
same top-level module). This also makes it much safer to textually include a
non-modular library into a module: each submodule that textually includes that
library will get its own "copy" of that library, and so the library becomes
visible no matter which including submodule you import.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@237473 91177308-0d34-0410-b5e6-96231b3b80d8
Member pointers in the MS ABI have different alignment depending on
whether they were created on the stack or live in a record.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235681 91177308-0d34-0410-b5e6-96231b3b80d8
The GCC construct __attribute__((aligned)) is defined to set alignment
to "the default alignment for the target architecture" according to
the GCC documentation:
The default alignment is sufficient for all scalar types, but may not be
enough for all vector types on a target that supports vector operations.
The default alignment is fixed for a particular target ABI.
clang currently hard-coded an alignment of 16 bytes for that construct,
which is correct on some platforms (including X86), but wrong on others
(including SystemZ). Since this value is ABI-relevant, it is important
to get correct for compatibility purposes.
This patch adds a new TargetInfo member "DefaultAlignForAttributeAligned"
that targets can set to the appropriate default __attribute__((aligned))
value.
Note that I'm deliberately *not* using the existing "SuitableAlign"
value, which is used to set the pre-defined macro __BIGGEST_ALIGNMENT__,
since those two values may not be the same on all platforms. In fact,
on X86, __attribute__((aligned)) always uses 16-byte alignment, while
__BIGGEST_ALIGNMENT__ may be larger if AVX-2 or AVX-512 are supported.
(This is actually not yet correctly implemented in clang either.)
The patch provides a value for DefaultAlignForAttributeAligned only for
SystemZ, and leaves the default for all other targets at 16, which means
no visible change in behavior on all other targets. (The value is still
wrong for some other targets, but I'd prefer to leave it to the target
maintainers for those platforms to fix.)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235397 91177308-0d34-0410-b5e6-96231b3b80d8
SystemZ prefers to align all global variables to two bytes, which is
implemented by setting the TargetInfo member MinGlobalAlign.
However, for compatibility with existing compilers this should *not*
change the ABI alignment value as retrieved via __alignof__, which
it currently does.
This patch fixes the issue by having ASTContext::getDeclAlign ignore
the MinGlobalAlign setting in the ForAlignof case.
Since SystemZ is the only platform setting MinGlobalAlign, this should
cause no change for any other target.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235395 91177308-0d34-0410-b5e6-96231b3b80d8
It was documented as 8 and operator new[] defaults to 8, but the normal
operator new was never updated and happily wasted bytes on every other
allocation.
We still have to allocate all Types with 16 byte alignment, update the
allocation calls for Types that were missing explicit alignment.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@233922 91177308-0d34-0410-b5e6-96231b3b80d8
for a DeclContext, and fix propagation of exception specifications along
redeclaration chains.
This reverts r232905, r232907, and r232907, which reverted r232793, r232853,
and r232853.
One additional change is present here to resolve issues with LLDB: distinguish
between whether lexical decls missing from the lookup table are local or are
provided by the external AST source, and still look in the external source if
that's where they came from.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232928 91177308-0d34-0410-b5e6-96231b3b80d8
When we need to build the lookup table for a DeclContext, we used to pull in
all lexical declarations for the context; instead, just build a lookup table
for the local lexical declarations. We previously didn't guarantee that the
imported declarations would be in the returned map, but in some cases we'd
happen to put them all in there regardless. Now we're even lazier about this.
This unnecessary work was papering over some other bugs:
- LookupVisibleDecls would use the DC for name lookups in the TU in C, and
this was not guaranteed to find all imported names (generally, the DC for
the TU in C is not a reliable place to perform lookups). We now use an
identifier-based lookup mechanism for this.
- We didn't actually load in the list of eagerly-deserialized declarations
when importing a module (so external definitions in a module wouldn't be
emitted by users of those modules unless they happened to be deserialized
by the user of the module).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232793 91177308-0d34-0410-b5e6-96231b3b80d8
We assumed that the most recent declaration of an inline function would
also be inline. However, a more recent declaration can come from a
friend declaration in a class template that is instantiated at the
definition of the function.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232786 91177308-0d34-0410-b5e6-96231b3b80d8
This adds support for copy-constructor closures. These are generated
when the C++ runtime has to call a copy-constructor with a particular
calling convention or with default arguments substituted in to the call.
Because the runtime has no mechanism to call the function with a
different calling convention or know-how to evaluate the default
arguments at run-time, we create a thunk which will do all the
appropriate work and package it in a way the runtime can use.
Differential Revision: http://reviews.llvm.org/D8225
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@231952 91177308-0d34-0410-b5e6-96231b3b80d8
of extern "C" declarations. This is simpler and vastly more efficient for
modules builds (we no longer need to load *all* extern "C" declarations to
determine if we have a redeclaration).
No functionality change intended.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@231538 91177308-0d34-0410-b5e6-96231b3b80d8
Find all unambiguous public classes of the exception object's class type
and reference all of their copy constructors. Yes, this is not
conforming but it is necessary in order to implement their ABI. This is
because the copy constructor is actually referenced by the metadata
describing which catch handlers are eligible to handle the exception
object.
N.B. This doesn't yet handle the copy constructor closure case yet,
that work is ongoing.
Differential Revision: http://reviews.llvm.org/D8101
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We would create the exception object with the wrong qualifiers, ensuring
that the wrong copy constructor would get called.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@231049 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Allow user to provide multiple blacklists by passing several
-fsanitize-blacklist= options. These options now don't override
default blacklist from Clang resource directory, which is always
applied (which fixes PR22431).
-fno-sanitize-blacklist option now disables all blacklists that
were specified earlier in the command line (including the default
one).
This change depends on http://reviews.llvm.org/D7367.
Test Plan: regression test suite
Reviewers: timurrrr
Subscribers: cfe-commits, kcc, pcc
Differential Revision: http://reviews.llvm.org/D7368
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228156 91177308-0d34-0410-b5e6-96231b3b80d8
We didn't consider any alignment attributes on an EnumDecl when
calculating alignment.
While we are here, ignore alignment specifications on typedef types if
one is used as the underlying type. Otherwise, weird things happen:
enum Y : int;
Y y;
typedef int __attribute__((aligned(64))) u;
enum Y : u {};
What is the alignment of 'Y'? It would be more consistent with the
overall design of enums with fixed underlying types to consider the
underlying type's UnqualifiedDesugaredType.
This fixes PR22279.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226653 91177308-0d34-0410-b5e6-96231b3b80d8
The test was fixed after a discussion with the revision author: the check
pattern was made more flexible as the "%call" part is not what we actually want
to check strictly there.
The original patch description:
===
Introduce SPIR calling conventions.
This implements Section 3.7 from the SPIR 1.2 spec:
SPIR kernels should use "spir_kernel" calling convention.
Non-kernel functions use "spir_func" calling convention. All
other calling conventions are disallowed.
The patch works only for OpenCL source. Any other uses will need
to ensure that kernels are assigned the spir_kernel calling
convention correctly.
===
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226561 91177308-0d34-0410-b5e6-96231b3b80d8
This implements Section 3.7 from the SPIR 1.2 spec:
SPIR kernels should use "spir_kernel" calling convention.
Non-kernel functions use "spir_func" calling convention. All
other calling conventions are disallowed.
The patch works only for OpenCL source. Any other uses will need
to ensure that kernels are assigned the spir_kernel calling
convention correctly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226548 91177308-0d34-0410-b5e6-96231b3b80d8
Types composed with certain implicit record types would have their RTTI
marked as hidden because the implicit record type didn't have any
visibility.
This manifests itself as triggering false positives from tools like
clang's -fsantize=function feature. The RTTI for a function type's
return type wouldn't match if the return type was an implicit record
type.
Patch by Stephan Bergmann!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226148 91177308-0d34-0410-b5e6-96231b3b80d8
Also add a few asserts for this. The existing code assumes this in a bunch
of places already (see e.g. the assert at the top of ParseTypedefDecl(), and
there are many unchecked calls on the result of GetTypeForDeclarator()), and
from looking through the code this should always be true from what I can tell.
This allows removing ASTContext::getNullTypeSourceInfo() too as that's now
unused.
No behavior change intended.
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To support it in the frontend, the following has been added:
- generic address space type attribute;
- documentation for the OpenCL address space attributes;
- parsing of __generic(generic) keyword;
- test code for the parser and diagnostics.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222831 91177308-0d34-0410-b5e6-96231b3b80d8
For all threadprivate variables which have constructor/destructor emit call to void __kmpc_threadprivate_register(ident_t * <Current Location>, void *<Original Global Addr>, kmpc_ctor <Constructor>, kmpc_cctor NULL, kmpc_dtor <Destructor>);
In expressions all references to such variables are replaced by calls to void *__kmpc_threadprivate_cached(ident_t *<Current Location>, kmp_int32 <Current Thread Id>, void *<Original Global Addr>, size_t <Size of Data>, void ***<Pointer to autogenerated cache – array of private copies of threadprivate variable>);
Test test/OpenMP/threadprivate_codegen.cpp checks that codegen is correct. Also it checks that codegen is correct after serialization/deserialization and one of passes verifies debug info.
Differential Revision: http://reviews.llvm.org/D4002
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221663 91177308-0d34-0410-b5e6-96231b3b80d8
Get rid of ugly SanitizerOptions class thrust into LangOptions:
* Make SanitizeAddressFieldPadding a regular language option,
and rely on default behavior to initialize/reset it.
* Make SanitizerBlacklistFile a regular member LangOptions.
* Introduce the helper class "SanitizerSet" to represent the
set of enabled sanitizers and make it a member of LangOptions.
It is exactly the entity we want to cache and modify in CodeGenFunction,
for instance. We'd also be able to reuse SanitizerSet in
CodeGenOptions for storing the set of recoverable sanitizers,
and in the Driver to represent the set of sanitizers
turned on/off by the commandline flags.
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221653 91177308-0d34-0410-b5e6-96231b3b80d8
Plumb through the full QualType of the TemplateArgument::Declaration, as
it's insufficient to only know whether the type is a reference or
pointer (that was necessary for mangling, but insufficient for debug
info). This shouldn't increase the size of TemplateArgument as
TemplateArgument::Integer is still longer by another 32 bits.
Several bits of code were testing that the reference-ness of the
parameters matched, but this seemed to be insufficient (various other
features of the type could've mismatched and wouldn't've been caught)
and unnecessary, at least insofar as removing those tests didn't cause
anything to fail.
(Richard - perchaps you can hypothesize why any of these checks might
need to test reference-ness of the parameters (& explain why
reference-ness is part of the mangling - I would've figured that for the
reference-ness to be different, a prior template argument would have to
be different). I'd be happy to add them in/beef them up and add test
cases if there's a reason for them)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219900 91177308-0d34-0410-b5e6-96231b3b80d8
The map is immutable until the whole ASTContext dies. While there
movify a couple of copies in ASTMatchFinder away. NFC.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219062 91177308-0d34-0410-b5e6-96231b3b80d8
We build a NestedNameSpecifier that records the CXXRecordDecl in which
__super appeared. Name lookup is performed in all base classes of the
recorded CXXRecordDecl. Use of __super is allowed only inside class and
member function scope.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218484 91177308-0d34-0410-b5e6-96231b3b80d8
we were failing to find that bit-field when performing integer promotions. This
brings us closer to following the standard, and closer to GCC.
In C, this change is technically a regression: we get bit-field promotions
completely wrong in C, promoting cases that are categorically not bit-field
designators. This change makes us do so slightly more consistently, though.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218428 91177308-0d34-0410-b5e6-96231b3b80d8
type encoding because in certain cases, such as for vector
types, because we still haven't designed encoding for them.
rdar://9255564
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216301 91177308-0d34-0410-b5e6-96231b3b80d8
A typedef of a typedef should have AlignIsRequired if *either* typedef
has an AlignAttr attached to it.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214698 91177308-0d34-0410-b5e6-96231b3b80d8
Douglas Gregor