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2010-04-28Completely reimplement __builtin_offsetof, based on a patch by RobertoDouglas Gregor
Amadini. This change introduces a new expression node type, OffsetOfExpr, that describes __builtin_offsetof. Previously, __builtin_offsetof was implemented using a unary operator whose subexpression involved various synthesized array-subscript and member-reference expressions, which was ugly and made it very hard to instantiate as a template. OffsetOfExpr represents the AST more faithfully, with proper type source information and a more compact representation. OffsetOfExpr also has support for dependent __builtin_offsetof expressions; it can be value-dependent, but will never be type-dependent (like sizeof or alignof). This commit introduces template instantiation for __builtin_offsetof as well. There are two major caveats to this patch: 1) CodeGen cannot handle the case where __builtin_offsetof is not a constant expression, so it produces an error. So, to avoid regressing in C, we retain the old UnaryOperator-based __builtin_offsetof implementation in C while using the shiny new OffsetOfExpr implementation in C++. The old implementation can go away once we have proper CodeGen support for this case, which we expect won't cause much trouble in C++. 2) __builtin_offsetof doesn't work well with non-POD class types, particularly when the designated field is found within a base class. I will address this in a subsequent patch. Fixes PR5880 and a bunch of assertions when building Boost.Python tests. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102542 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-28More of Sema to implement initialization ofFariborz Jahanian
ivar of c++ object types. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102500 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-27Move CollectIvarsToConstructOrDestruct to SemaFariborz Jahanian
from AST, consider ivar array of objects (per Doug's comment). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102446 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-27Make the InjectedClassNameType the canonical type of the current instantiationJohn McCall
of a class template or class template partial specialization. That is to say, in template <class T> class A { ... }; or template <class T> class B<const T*> { ... }; make 'A<T>' and 'B<const T*>' sugar for the corresponding InjectedClassNameType when written inside the appropriate context. This allows us to track the current instantiation appropriately even inside AST routines. It also allows us to compute a DeclContext for a type much more efficiently, at some extra cost every time we write a template specialization (which can be optimized, but I've left it simple in this patch). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102407 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26Improve source-location information in a C++ typeid (type) expressionDouglas Gregor
by using TypeSourceInfo, cleaning up the representation somewhat. Teach getTypeOperand() to strip references and cv-qualifiers, providing the semantic view of the type without requiring any extra storage (the unmodified type remains within the TypeSourceInfo). This fixes a bug found by Boost's call_traits test. Finally, clean up semantic analysis, by splitting the ActOnCXXTypeid routine into ActOnCXXTypeId (the parser action) and two BuildCXXTypeId functions, which perform the semantic analysis for typeid(type) and typeid(expression), respectively. We now perform less work at template instantiation time (we don't look for std::type_info again) and can give better diagnostics. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102393 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26Refactor Objective-C @catch parameter checking by detangling it fromDouglas Gregor
function-parameter checking and splitting it into the normal ActOn*/Build* pair in Sema. We now use VarDecl to represent the @catch parameter rather than the ill-fitting ParmVarDecl. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102347 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Add base paths for CK_BaseToDerived and CK_BaseToDerivedMemberPointer.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102261 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Actually produce base paths for CastExprs of kind CK_DerivedToBase.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102259 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Pass the base specifiers through to CheckDerivedToBaseConversion. No ↵Anders Carlsson
functionality change yet. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102250 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24CastExpr should not hold a pointer to the base path. More cleanup.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102249 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Rename InheritancePath to BasePath, rename CastExpr::CXXBaseVector to ↵Anders Carlsson
CXXBaseSpecifierArray. More to come. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102245 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Keep track of when DependentNameTypes have no associated keywordDouglas Gregor
(e.g., no typename, enum, class, etc.), e.g., because the context is one that is known to refer to a type. Patch from Enea Zaffanella! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102243 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23Rework Parser-Sema interface for Objective-C @catch exception objectDouglas Gregor
arguments. Rather than having the parser call ActOnParamDeclarator (which is a bit of a hack), call a new ActOnObjCExceptionDecl action. We'll be moving more functionality into this handler to perform earlier checking of @catch. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102222 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23Improve the AST representation of Objective-C @try/@catch/@finallyDouglas Gregor
statements. Instead of the @try having a single @catch, where all of the @catch's were chained (using an O(n^2) algorithm nonetheless), @try just holds an array of its @catch blocks. The resulting AST is slightly more compact (not important) and better represents the actual language semantics (good). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102221 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23Add an InheritancePath parameter to the ImplicitCastExpr constructor.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102218 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Kill off IDNS_ObjCImplementation and IDNS_ObjCCategoryName; theyDouglas Gregor
aren't and never were used. There's a gap in the bit pattern for IDNS now, but I'm sure *someone* will fill it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102143 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Implement template instantiation for Objective-C++ @throw statements.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102133 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22When a dependent Objective-C++ message send was able to resolve theDouglas Gregor
method being called at template definition time, retain that method and pass it through to type-checking. We will not perform any lookup for the method during template instantiation. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102081 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Remove the SelectorLoc argument to Sema::BuildInstanceMesssage andDouglas Gregor
Sema::BuildClassMessage; we weren't using it, and template instantiation was faking it anyway. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102074 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Re-land the patch that merges two diagnostics into one now that it passes ↵Anders Carlsson
self-host :) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102050 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Revert "Unify two diagnostics into one.", it breaks with an assertion ↵Daniel Dunbar
failure on bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102043 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Unify two diagnostics into one.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102040 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Whenever we complain about a failed initialization of a function orDouglas Gregor
method parameter, provide a note pointing at the parameter itself so the user does not have to manually look for the function/method being called and match up parameters to arguments. For example, we now get: t.c:4:5: warning: incompatible pointer types passing 'long *' to parameter of type 'int *' [-pedantic] f(long_ptr); ^~~~~~~~ t.c:1:13: note: passing argument to parameter 'x' here void f(int *x); ^ git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102038 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Migrate the responsibility for turning the receiver name in anDouglas Gregor
Objective-C class message expression into a type from the parser (which was doing so in two places) to Action::getObjCMessageKind() which, in the case of Sema, reduces the number of name lookups we need to perform. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102026 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Rework the Parser-Sema interaction for Objective-C messageDouglas Gregor
sends. Major changes include: - Expanded the interface from two actions (ActOnInstanceMessage, ActOnClassMessage), where ActOnClassMessage also handled sends to "super" by checking whether the identifier was "super", to three actions (ActOnInstanceMessage, ActOnClassMessage, ActOnSuperMessage). Code completion has the same changes. - The parser now resolves the type to which we are sending a class message, so ActOnClassMessage now accepts a TypeTy* (rather than an IdentifierInfo *). This opens the door to more interesting types (for Objective-C++ support). - Split ActOnInstanceMessage and ActOnClassMessage into parser action functions (with their original names) and semantic functions (BuildInstanceMessage and BuildClassMessage, respectively). At present, this split is onyl used by ActOnSuperMessage, which decides which kind of super message it has and forwards to the appropriate Build*Message. In the future, Build*Message will be used by template instantiation. - Use getObjCMessageKind() within the disambiguation of Objective-C message sends vs. array designators. Two notes about substandard bits in this patch: - There is some redundancy in the code in ParseObjCMessageExpr and ParseInitializerWithPotentialDesignator; this will be addressed shortly by centralizing the mapping from identifiers to type names for the message receiver. - There is some #if 0'd code that won't likely ever be used---it handles the use of 'super' in methods whose class does not have a superclass---but could be used to model GCC's behavior more closely. This code will die in my next check-in, but I want it in Subversion. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102021 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Pass the InitializedEntity to Sema::CheckConstructorAccess and use it to ↵Anders Carlsson
report different diagnostics depending on which entity is being initialized. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102010 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20Remove dead code.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101920 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20Keep proper source location information for the type in an Objective-CDouglas Gregor
@encode expression. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101907 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-19Do not diagnose unused-parameter errors in template instantiations. WeDouglas Gregor
will already have done so when the template is declared. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101838 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-19Keep track of the actual storage specifier written on a variable orDouglas Gregor
function declaration, since it may end up being changed (e.g., "extern" can become "static" if a prior declaration was static). Patch by Enea Zaffanella and Paolo Bolzoni. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101826 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-18In C++98/03, when binding a reference to an rvalue ofDouglas Gregor
reference-compatible type, the implementation is permitted to make a copy of the rvalue (or many such copies, even). However, even though we don't make that copy, we are required to check for the presence of a suitable copy constructor. With this change, we do. Note that in C++0x we are not allowed to make these copies, so we test both dialects separately. Also note the FIXME in one of the C++03 tests, where we are not instantiating default function arguments for the copy constructor we pick (but do not call). The fix is obvious; eliminating the infinite recursion it causes is not. Will address that next. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101704 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17Improve our handling of user-defined conversions as part of overloadDouglas Gregor
resolution. There are two sources of problems involving user-defined conversions that this change eliminates, along with providing simpler interfaces for checking implicit conversions: - It eliminates a case of infinite recursion found in Boost. - It eliminates the search for the constructor needed to copy a temporary generated by an implicit conversion from overload resolution. Overload resolution assumes that, if it gets a value of the parameter's class type (or a derived class thereof), there is a way to copy if... even if there isn't. We now model this properly. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101680 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17Consolidate most of the integer constant expression builtin requirementEric Christopher
checking into a single function and use that throughout. Remove some now unnecessary diagnostics and update tests with now more accurate diagnostics. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101610 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Switch Sema::FindCompositePointerType() over to InitializationSequence. Douglas Gregor
This is the last of the uses of TryImplicitConversion outside of overload resolution and InitializationSequence itself. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101569 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Make Sema::BuildCXXCastArgument static, since it now only has one caller. No ↵Douglas Gregor
functionality change git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101550 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Collapse the three separate initialization paths inDouglas Gregor
TryStaticImplicitCast (for references, class types, and everything else, respectively) into a single invocation of InitializationSequence. One of the paths (for class types) was the only client of Sema::TryInitializationByConstructor, which I have eliminated. This also simplified the interface for much of the cast-checking logic, eliminating yet more code. I've kept the representation of C++ functional casts with <> 1 arguments the same, despite the fact that I hate it. That fix will come soon. To satisfy my paranoia, I've bootstrapped + tested Clang with these changes. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101549 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Kill ForceRValue once and for allDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101502 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Move Sema::TryCopyInitialization into a static function inDouglas Gregor
SemaOverload.cpp; no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101497 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Eliminate the ForceRValue parameter to Sema::AddOverloadCandidateDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101494 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Eliminate the ForceRValue parameter from most of Sema's Add*CandidateDouglas Gregor
functions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101492 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Eliminate the ForceRValue parameter from Sema::IsUserDefinedConversion. It's ↵Douglas Gregor
not the way we're going to handle this. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101483 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Eliminate the default value for the UserCast parameter of ↵Douglas Gregor
Sema::IsUserDefinedConversion. No functionality change git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101482 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Eliminate the Elidable parameter to PerformImplicitConversion; weDouglas Gregor
don't need it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101481 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15Feed proper source-location information into Sema::LookupSingleResult,Douglas Gregor
in case it ends up doing something that might trigger diagnostics (template instantiation, ambiguity reporting, access reporting). Noticed while working on PR6831. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101412 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14Thread a Scope pointer into BuildRecoveryCallExpr to help typoDouglas Gregor
correction find names when a call failed. Fixes <rdar://problem/7853795>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101278 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14Teach typo correction about various language keywords. We can'tDouglas Gregor
generally recover from typos in keywords (since we would effectively have to mangle the token stream). However, there are still benefits to typo-correcting with keywords: - We don't make stupid suggestions when the user typed something that is similar to a keyword. - We can suggest the keyword in a diagnostic (did you mean "static_cast"?), even if we can't recover and therefore don't have a fix-it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101274 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14Return the corrected DeclarationName from Sema::CorrectTypo ratherDouglas Gregor
than just a bool indicating that correction occurred. No actual functionality change (it's still always used like a bool), but this refactoring will be used to support typo correction to keywords. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101259 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14Implement typo correction for Objective-C message sends when theDouglas Gregor
receiver is a mis-typed class name. Previously, we would give a non-specific typo-correction diagnostic from the expression-parsing code, but there was no fix-it because it was too late to recover. Now, we give a nice diagnostic honk.m:6:4: error: unknown receiver 'Hnk'; did you mean 'Honk'? [Hnk method]; ^~~ Honk honk.m:1:1: note: 'Honk' declared here @interface Honk ^ which includes a fix-it. We still need to recover better from mis-typing "super". git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101211 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13Support befriending members of class template specializations.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101173 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13Refactor and simplify the computation of implicit conversion sequencesDouglas Gregor
for reference binding. The code attempted to handle both the computation of the ICS and the actual conversion, but the latter is an anachronism: we now use InitializationSequence for that. Sema::CheckReferenceInit is now a static function TryReferenceInit that's only use within overload resolution, and has been simplified slightly. It still needs to be updated per C++ [over.ics.ref], by eliminating more of the lvalue/rvalue checks. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101136 91177308-0d34-0410-b5e6-96231b3b80d8
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