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2010-03-13Reinstate patch to turn explicit template instantiations into weak symbolsDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98424 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-12Revert the linkage change for explicit template instantiations; something is ↵Douglas Gregor
amiss git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98332 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-12Give explicit template instantiations weak linkage (but don't deferDouglas Gregor
them). Fixes PR6578. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98328 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-10Delay codegen of vtables when handling implicit instantiations.Rafael Espindola
This fixes PR6474. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98123 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-06Add a message to these asserts.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97873 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-06Implement __builtin_dwarf_sp_column for i386 (Darwin and not), x86-64 (all),John McCall
and ARM. Implement __builtin_init_dwarf_reg_size_table for i386 (both) and x86-64 (all). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97859 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-04Fix PR6473.Rafael Espindola
Clang's support for weakref is now better than llvm-gcc's :-) We don't introduce a new symbol and we correctly mark undefined references weak only if there is no definition or regular undefined references in the same file. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97733 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-04Revert changes r97693, r97700, and r97718.John McCall
Our testing framework can't deal with disabled targets yet. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97719 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-04Refactor local class name mangling and make itFariborz Jahanian
ABI conforming. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97702 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-04Create a TargetMachine whenever we create a CodeGenAction. The codegen ofJohn McCall
some builtins will rely on target knowledge. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97693 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-02During codegen assert that any copy assignment, destructor or constructor thatRafael Espindola
we need to synthesize has been marked as used by Sema. Change Sema to avoid these asserts. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97589 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-23Add support for the weakref attribute. We still produce "alias weak" as ↵Rafael Espindola
llvm-gcc does, but are more strict on what uses of weakref we accept. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96992 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-23Perform two more constructor/destructor code-size optimizations:John McCall
1) emit base destructors as aliases to their unique base class destructors under some careful conditions. This is enabled for the same targets that can support complete-to-base aliases, i.e. not darwin. 2) Emit non-variadic complete constructors for classes with no virtual bases as calls to the base constructor. This is enabled on all targets and in theory can trigger in situations that the alias optimization can't (mostly involving virtual bases, mostly not yet supported). These are bundled together because I didn't think it worthwhile to split them, not because they really need to be. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96842 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-19Re-introduce the ctor/dtor alias optimization, this time hidden behind aJohn McCall
command-line option which defaults off. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96649 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-18Revert the ctor/dtor alias optimization for now; the buildbots can detectJohn McCall
some failure here that I can't. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96612 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17Emit complete constructors and destructors as aliases to base constructorsJohn McCall
and destructors when the two entities are semantically identical, i.e. when the class has no virtual base classes. We only do this for linkage types for which aliases are supported, i.e. internal and external, i.e. not linkonce. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96451 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-11Remove use of 'std::string' from Attr objects, using instead a byteTed Kremenek
array allocated using the allocator in ASTContext. This addresses these strings getting leaked when using a BumpPtrAllocator (in ASTContext). Fixes: <rdar://problem/7636765> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95853 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-08Emit global references with constant initializers as constants. Fixes PR5585.John McCall
The standard actually says that such references should have internal linkage, but gcc doesn't do that, so we probably can't get away with it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95577 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-07Improved handling of the visibility attribute. Declarations now inherit ↵Anders Carlsson
their parent's visibility. (This is kind of a risky change, but I did a self-host build and everything appears to work fine!) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95511 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-06Switch CodeGen's "is this variable declaration a definition?" logicDouglas Gregor
over to VarDecl::isThisDeclarationADefinition(), which handles variables declared with linkage specifications better (among other things). CMake 2.9 (from CVS) now builds with clang++ and is somewhat functional. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95486 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-06Use the correct function info for constructors when applying function ↵Anders Carlsson
attributes. Fixes PR6245. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95474 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-03When a function or variable somehow depends on a type or declarationDouglas Gregor
that is in an anonymous namespace, give that function or variable internal linkage. This change models an oddity of the C++ standard, where names declared in an anonymous namespace have external linkage but, because anonymous namespace are really "uniquely-named" namespaces, the names cannot be referenced from other translation units. That means that they have external linkage for semantic analysis, but the only sensible implementation for code generation is to give them internal linkage. We now model this notion via the UniqueExternalLinkage linkage type. There are several changes here: - Extended NamedDecl::getLinkage() to produce UniqueExternalLinkage when the declaration is in an anonymous namespace. - Added Type::getLinkage() to determine the linkage of a type, which is defined as the minimum linkage of the types (when we're dealing with a compound type that is not a struct/class/union). - Extended NamedDecl::getLinkage() to consider the linkage of the template arguments and template parameters of function template specializations and class template specializations. - Taught code generation to rely on NamedDecl::getLinkage() when determining the linkage of variables and functions, also considering the linkage of the types of those variables and functions (C++ only). Map UniqueExternalLinkage to internal linkage, taking out the explicit checks for isInAnonymousNamespace(). This fixes much of PR5792, which, as discovered by Anders Carlsson, is actually the reason behind the pass-manager assertion that causes the majority of clang-on-clang regression test failures. With this fix, Clang-built-Clang+LLVM passes 88% of its regression tests (up from 67%). The specific numbers are: LLVM: Expected Passes : 4006 Expected Failures : 32 Unsupported Tests : 40 Unexpected Failures: 736 Clang: Expected Passes : 1903 Expected Failures : 14 Unexpected Failures: 75 Overall: Expected Passes : 5909 Expected Failures : 46 Unsupported Tests : 40 Unexpected Failures: 811 Still to do: - Improve testing - Check whether we should allow the presence of types with InternalLinkage (in addition to UniqueExternalLinkage) given variables/functions internal linkage in C++, as mentioned in PR5792. - Determine how expensive the getLinkage() calls are in practice; consider caching the result in NamedDecl. - Assess the feasibility of Chris's idea in comment #1 of PR5792. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95216 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-01Don't explicitly force utf strings into the __TEXT,__ustringChris Lattner
by setting the section of the generated global. This is an optimization done by the code generator, and the code being removed didn't handle the case when the string contained an embedded nul (which the code generator does correctly handle). This is rdar://7589850 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95003 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-01In C++, an initializer on a variable doesn't necessarily mean it's the ↵Sebastian Redl
definition. With that in mind, rename getDefinition to getAnyInitializer (to distinguish it from getInit) and reimplement it in terms of isThisDeclarationADefinition. Update all code to use this new function. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94999 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-27Change the return type of ASTContext::getDeclAlignInBytes() to CharUnits and,Ken Dyck
now that the "InBytes" part of the name is implied by the return type, rename it to getDeclAlign(). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94681 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-26Use CharUnits for alignment of UTF16 string in GetAddrOfConstantCFString().Ken Dyck
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94564 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-26Use the right definition when emitting a global variable. Fixes PR5564.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94555 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-26Introduce CodeGenModule::GetTargetTypeStoreSize() to calculate the store sizeKen Dyck
of LLVM types in character units. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94542 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-26If a global variable has an initializer with side effects, it can never be ↵Anders Carlsson
deferred (even if it's in an anonymous namespace). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94525 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-23Created __builtin___NSStringMakeConstantString() builtin, which generates ↵David Chisnall
constant Objective-C strings. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94274 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-10Generalize target weirdness handling having proper layering in mind:Anton Korobeynikov
1. Add helper class for sema checks for target attributes 2. Add helper class for codegen of target attributes As a proof-of-concept - implement msp430's 'interrupt' attribute. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93118 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-09revert r92749, which is just dead code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93074 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-08Fix for PR5967: Make const-marking for LLVM globals correct for cases requiringEli Friedman
run-time initialization, and emit run-time initializers aggresively to avoid ordering issues with deferred globals. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92976 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-06Fix linkage for RTTI names by re-using the logic for computing theDouglas Gregor
linkage of vtables. Before this, we were emitting RTTI names for template instantiations with strong external linkage rather than with weak ODR linkage. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92857 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-06Fix marking of virtual members for nested classes whose first non-pure ↵Douglas Gregor
virtual function has a body inlined in the class git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92855 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-05Improve key-function computation for templates. In particular:Douglas Gregor
- All classes can have a key function; templates don't change that. non-template classes when computing the key function. - We always mark all of the virtual member functions of class template instantiations. - The vtable for an instantiation of a class template has weak linkage. We could probably use available_externally linkage for vtables of classes instantiated by explicit instantiation declarations (extern templates), but GCC doesn't do this and I'm not 100% that the ABI permits it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92753 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-05Add code to skip the emission of available externally functions at -O0. WIP.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92749 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-29strength reduce this call away.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92253 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-28this form of SetDebugLocation is about to go away, add some #includes thatChris Lattner
are about to not come in implicitly. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92228 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-25Some small improvements to dead code elimination; helps a bit onEli Friedman
LLVM-Code-Symbols test. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92152 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-12Un-namespace-qualify llvm_unreachable. It's a macro, so the qualification gaveJeffrey Yasskin
no extra safety anyway. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91207 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11Fix for PR5714: make sure globals that will be modified aren't marked const.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91156 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11Random string-related cleanups.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91119 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-10Make sure that explicitly instantiated functions get the right linkage.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91069 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-09Fix for PR5709: use the computed type of the declaration instead of theEli Friedman
type of the builtin when generating the function declaration for a builtin library call. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90936 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-08Misc key function fixes.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90831 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-07A bunch more thunk fixes from misc testing.Eli Friedman
(Yes, I do intend to commit some tests for this.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90818 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06Work-in-progess rewrite of thunks: move thunk generation outside of vtableEli Friedman
generation, and make sure we generate thunks when the function is defined rather than when the vtable is defined. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90722 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06Add rudimentary support for member pointers to CGDebugInfo.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90711 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04Don't emit explicit specializations of static member variable declarations.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90624 91177308-0d34-0410-b5e6-96231b3b80d8
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