initialization before main. Fixes pr5396.

llvm-svn: 86145

in covariant thunks that return references.

llvm-svn: 86121

pointers are returned.

llvm-svn: 86120

ctor's initializer. Fixes pr5178.

llvm-svn: 86040

of array objects on block exit. Patch is by Anders Calrsson.

llvm-svn: 86032

from Peter Collingbourne!

llvm-svn: 86030

Merge constant array and structures. This will create a global variables for arrays and structs that are constant and their initializer is constant. It is on by default but can be disable with the flag -fno-merge-all-constants.

llvm-svn: 85991

llvm-svn: 85990

so the optimizer can tailcall into the return value adjustment thunk.
This improves codesize for complex hierarchies.

llvm-svn: 85988

llvm-svn: 85978

type to look at the volatile specifier.  I found these all from just
hand auditing the code.

llvm-svn: 85967

llvm-svn: 85916

llvm-svn: 85905

llvm-svn: 85901

llvm-svn: 85856

llvm-svn: 85852

llvm-svn: 85842

llvm-svn: 85839

llvm-svn: 85677

Get throws limping along, still a bunch of FIXMEs. Too bad we don't support catching anything yet :)

llvm-svn: 85574

llvm-svn: 85565

llvm-svn: 85560

llvm-svn: 85555

llvm-svn: 85512

make clang emit undefs for padding of structs and unions instead of zeros. this enables constant compaction optimizations.

llvm-svn: 85504

llvm-svn: 85453

using the new LLVM support for this.  This is temporarily hiding
behind horrible and ugly #ifdefs until the time when the optimizer
is stable (hopefully a week or so).  Until then, lets make it "opt in" :)

llvm-svn: 85446

llvm-svn: 85434

llvm-svn: 85432

llvm-svn: 85424

llvm-svn: 85422

llvm-svn: 85408

declaration, since attributes that affect mangling may have been added
to subsequent declarations. However, to determine the linkage of the
declaration, we need to look at the canonical declaration. Fixes PR4412.

llvm-svn: 85400

llvm-svn: 85373

llvm-svn: 85363

llvm-svn: 85354

llvm-svn: 85345

llvm-svn: 85343

inlined functions. For example, given

  template<typename T>
  class string {
    unsigned Len;

  public:
    unsigned size() const { return Len; }
  };

  extern template class string<char>;

we now give the instantiation of string<char>::size
available_externally linkage (if it is ever instantiated!), as
permitted by the C++0x standard.
      

llvm-svn: 85340

side-effects up front, as when we switch to the llvm intrinsic call
for __builtin_object_size later, it will have two evaluations.

We also finish off the intrinsic version of the code so we can just
turn it on once llvm has the intrinsic.

llvm-svn: 85324