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2010-03-30Add Support for 'warn_unused_result" attribute onFariborz Jahanian
objective-c methods. (radar 7418262). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99903 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-29Optimize PartialDiagnostic's memory-allocation behavior by placing aDouglas Gregor
cache of PartialDiagnostic::Storage objects into an allocator within the ASTContext. This eliminates a significant amount of malloc traffic, for a 10% performance improvement in -fsyntax-only wall-clock time with 403.gcc's combine.c. Also, eliminate the RequireNonAbstractType hack I put in earlier, which was but a symptom of this larger problem. Fixes <rdar://problem/7806091>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99849 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-12Improve the unused-value check to look into comma expressions and filter outJohn McCall
voids in sub-expressions. Patch by Mike M! Fixes PR4806. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98335 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01Keep an explicit stack of function and block scopes, each element ofDouglas Gregor
which has the label map, switch statement stack, etc. Previously, we had a single set of maps in Sema (for the function) along with a stack of block scopes. However, this lead to funky behavior with nested functions, e.g., in the member functions of local classes. The explicit-stack approach is far cleaner, and we retain a 1-element cache so that we're not malloc/free'ing every time we enter a function. Fixes PR6382. Also, tweaked the unused-variable warning suppression logic to look at errors within a given Scope rather than within a given function. The prior code wasn't looking at the right number-of-errors count when dealing with blocks, since the block's count would be deallocated before we got to ActOnPopScope. This approach works with nested blocks/functions, and gives tighter error recovery. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97518 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01Don't warn about case-value conversions from a negative value to aDouglas Gregor
larger unsigned value, since this is implementation-defined behavior. (We previously suppressed this warning when converting from a signed value to an unsigned value of the same size). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97430 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-18Don't diagnose overflow in case statements when the conversion is aDouglas Gregor
signed<->unsigned conversion with the same bit width. Fixes <rdar://problem/7658121>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96545 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17For -Wswitch-enum warnings, be sure to look through typedefs of enumDouglas Gregor
types. Fixes <rdar://problem/7643909>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96531 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-11When we have a dependent direct initializer but not a dependentDouglas Gregor
variable type, we can (and should) still check for completeness of the variable's type. Do so, to work around an assertion that shows up in Boost's shared_ptr. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95934 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-08Warn when cases are missing from a switch on a value of enumerationDouglas Gregor
type (-Wswitch), from Michal! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95592 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-05Standardize the parsing of function type attributes in a way thatJohn McCall
follows (as conservatively as possible) gcc's current behavior: attributes written on return types that don't apply there are applied to the function instead, etc. Only parse CC attributes as type attributes, not as decl attributes; don't accepet noreturn as a decl attribute on ValueDecls, either (it still needs to apply to other decls, like blocks). Consistently consume CC/noreturn information throughout codegen; enforce this by removing their default values in CodeGenTypes::getFunctionInfo(). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95436 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-03Implement Doug's suggestion. Eliminate the Stmts pointer from CXXTryStmt and ↵Sam Weinig
instead allocate the statements after the object. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95199 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-03Remove the SmallVector from CXXTryStmt.Sam Weinig
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95190 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-03Implement the lvalue-to-rvalue conversion where needed. TheDouglas Gregor
lvalue-to-rvalue conversion adjusts lvalues of qualified, non-class type to rvalue expressions of the unqualified variant of that type. For example, given: const int i; (void)(i + 17); the lvalue-to-rvalue conversion for the subexpression "i" will turn it from an lvalue expression (a DeclRefExpr) with type 'const int' into an rvalue expression with type 'int'. Both C and C++ mandate this conversion, and somehow we've slid through without implementing it. We now have both DefaultFunctionArrayConversion and DefaultFunctionArrayLvalueConversion, and which gets used depends on whether we do the lvalue-to-rvalue conversion or not. Generally, we do the lvalue-to-rvalue conversion, but there are a few notable exceptions: - the left-hand side of a '.' operator - the left-hand side of an assignment - a C++ throw expression - a subscript expression that's subscripting a vector Making this change exposed two issues with blocks: - we were deducing const-qualified return types of non-class type from a block return, which doesn't fit well - we weren't always setting the known return type of a block when it was provided with the ^return-type syntax Fixes the current Clang-on-Clang compile failure and PR6076. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95167 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-31Really trivial patch to accept pointer to const void in indirect goto. DespiteChandler Carruth
the lack of documentation, this matches the behavior of GCC. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94954 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-30Remove the SmallVectors from AsmStmt. Fixes PR6105.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94926 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-30Use IdentifierInfo * instead of std::string for the AsmStmt names.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94925 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-30Combine AsmStmt::setOutputsAndInputs and AsmStmt::setClobbers.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94918 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-30StringRef-ize the TargetInfo::ConstraintInfo constructor.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94916 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-29Get rid of another old PerformCopyInitialization call.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94819 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-24Implement instantiation of AsmStmts (Crazy, I know)Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94361 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-24fix PR6034, a crash on invalid where the switch stack would get Chris Lattner
unbalanced. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94347 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-20Give UnresolvedSet the ability to store access specifiers for each declaration.John McCall
Change LookupResult to use UnresolvedSet. Also extract UnresolvedSet into its own header and make it templated over an inline capacity. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93959 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-19Implement goto inside of blocks.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93945 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-04Remember if the AsmStmt came from Microsoft-style inline assembly code.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92526 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-25Remove some dead variables clang-analyzer found.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92162 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-22Switch InitializedEntity from TypeLoc down to just QualTypes, since we don't ↵Douglas Gregor
use the location information but we did spend a bunch of time building faked-up TypeLocs git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91905 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-20fix PR4010: add support for the warn_unused_result for function pointersNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91803 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Try to de-bork DISABLE_SMART_POINTERS buildDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91696 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Switch the initialization required by return statements over to theDouglas Gregor
new InitializationSequence. This fixes some bugs (e.g., PR5808), changed some diagnostics, and caused more churn than expected. What's new: - InitializationSequence now has a "C conversion sequence" category and step kind, which falls back to - Changed the diagnostics for returns to always have the result type of the function first and the type of the expression second. CheckSingleAssignmentConstraints to peform checking in C. - Improved ASTs for initialization of return values. The ASTs now capture all of the temporaries we need to create, but intentionally do not bind the tempoary that is actually returned, so that it won't get destroyed twice. - Make sure to perform an (elidable!) copy of the class object that is returned from a class. - Fix copy elision in CodeGen to properly see through the subexpressions that occur with elidable copies. - Give "new" its own entity kind; as with return values and thrown objects, we don't bind the expression so we don't call a destructor for it. Note that, with this patch, I've broken returning move-only types in C++0x. We'll fix it later, when we tackle NRVO. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91669 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-16Fix semantic diagnostics that embed English works, from Nicola Gigante!Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91503 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-15ShouldDestroyTemporaries? I don't think so.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91450 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-25Fix a thinko where we weren't always performing unary conversions on the ↵Douglas Gregor
switch condition, fixing PR5612 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89864 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-25When the condition of a switch() statement is semantically invalid,Douglas Gregor
still parse the body of the switch to try to avoid spurious diagnostics. Fixes PR5606. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89847 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-25Refactor ActOnFinishSwitchStmt to simplify it furtherDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89843 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-25Refactor ActOnFinishSwitchStmt to simplify and reduce nestingDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89842 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-25Eliminate CXXConditionDeclExpr with extreme prejudice.Douglas Gregor
All statements that involve conditions can now hold on to a separate condition declaration (a VarDecl), and will use a DeclRefExpr referring to that VarDecl for the condition expression. ForStmts now have such a VarDecl (I'd missed those in previous commits). Also, since this change reworks the Action interface for if/while/switch/for, use FullExprArg for the full expressions in those expressions, to ensure that we're emitting Note that we are (still) not generating the right cleanups for condition variables in for statements. That will be a follow-on commit. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89817 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-24Clean up the AST for while loops and fix several problems withDouglas Gregor
cleanups for while loops: 1) Make sure that we destroy the condition variable of a while statement each time through the loop for, e.g., while (shared_ptr<WorkInt> p = getWorkItem()) { // ... } 2) Make sure that we always enter a new cleanup scope for the body of the while loop, even when there is no compound expression, e.g., while (blah) RAIIObject raii(blah+1); git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89800 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-24Explicitly store the condition variable within switch statements, andDouglas Gregor
make sure that this variable is destroyed when we exit the switch statement. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89776 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23Explicitly track the condition variable within an "if" statement,Douglas Gregor
rather than burying it in a CXXConditionDeclExpr (that occassionally hides behind implicit conversions). Similar changes for switch, while, and do-while will follow, then the removal of CXXConditionDeclExpr. This commit is the canary. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89717 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23Require a class type to be complete before probing its conversionDouglas Gregor
functions for a switch condition's conversion to integral or enumeration type. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89656 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23Implement conversion from a switch condition with class type to anDouglas Gregor
integral or enumeration type (vi user-defined conversions). Fixes PR5518. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89655 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-19Don't issue spurious diagnostic with Obj-C fast enumeration.Fariborz Jahanian
(radar 7409165). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89400 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-16First part of changes to eliminate problems with cv-qualifiers andDouglas Gregor
sugared types. The basic problem is that our qualifier accessors (getQualifiers, getCVRQualifiers, isConstQualified, etc.) only look at the current QualType and not at any qualifiers that come from sugared types, meaning that we won't see these qualifiers through, e.g., typedefs: typedef const int CInt; typedef CInt Self; Self.isConstQualified() currently returns false! Various bugs (e.g., PR5383) have cropped up all over the front end due to such problems. I'm addressing this problem by splitting each qualifier accessor into two versions: - the "local" version only returns qualifiers on this particular QualType instance - the "normal" version that will eventually combine qualifiers from this QualType instance with the qualifiers on the canonical type to produce the full set of qualifiers. This commit adds the local versions and switches a few callers from the "normal" version (e.g., isConstQualified) over to the "local" version (e.g., isLocalConstQualified) when that is the right thing to do, e.g., because we're printing or serializing the qualifiers. Also, switch a bunch of Context.getCanonicalType(T1).getUnqualifiedType() == Context.getCanonicalType(T2).getQualifiedType() expressions over to Context.hasSameUnqualifiedType(T1, T2) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88969 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-14If we attempt to add a constructor template specialization that looksDouglas Gregor
like a copy constructor to the overload set, just ignore it. This ensures that we don't try to use such a constructor as a copy constructor *without* triggering diagnostics at the point of declaration. Note that we *do* diagnose such copy constructors when explicitly written by the user (e.g., as an explicit specialization). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88733 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03Refine volatile handling, specifically, we must have the canonicalMike Stump
type to look at the volatile specifier. I found these all from just hand auditing the code. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85967 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-20Remove default argument for ImpCastExprToType. Add appropriate argument Eli Friedman
to all callers. Switch a few other users of CK_Unknown to proper cast kinds. Note that there are still some situations where we end up with CK_Unknown; they're pretty easy to find with grep. There are still a few missing conversion kinds, specifically pointer/int/float->bool and the various combinations of real/complex float/int->real/complex float/int. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84623 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-17Fix for PR5190, Credit to Zhanyong Wan.Edward O'Callaghan
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84346 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-16Implement PR4407 - missing warnings on case value overflow,Chris Lattner
patch by Zhanyong Wan! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84259 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13make the diagnostic in the 'unused result' warning more preciseChris Lattner
about the reason, rdar://7186119. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83940 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-12Implement -Wparentheses: warn about using assignments in contexts that requireJohn McCall
conditions. Add a fixit to insert the parentheses. Also fix a very minor possible memory leak in 'for' conditions. Fixes PR 4876 and rdar://problem/7289172 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83907 91177308-0d34-0410-b5e6-96231b3b80d8
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