llvm-svn: 124529

When trying to get the most derived class, don't assume that we can ignore all casts. We can only ignore derived-to-base and no-op casts. Fixes selfhost.

llvm-svn: 124528

When calling a virtual member function on a base class and the most derived class is marked 'final', we can devirtualize the call.

llvm-svn: 124524

When doing a derived-to-base class through a virtual class, we don't have to get the vbase offset from the vtable if the derived class is marked final.

llvm-svn: 124523

indirect vf calls and addition of extra entry
at bottom of vtbls.

llvm-svn: 124507

llvm-svn: 124503

Pure motion.

llvm-svn: 124484

for CodeGen's RValue type.

llvm-svn: 124483

fixing a crash which probably nobody was ever going to see.  In doing so,
fix a horrendous number of problems with the conditional-cleanups code.
Also, make conditional cleanups re-use the cleanup's activation variable,
which avoids some unfortunate repetitiveness.

llvm-svn: 124481

non-class prvalues actually require the realization of a
temporary. For everything else, we already have an lvalue (or class
prvalue) in the subexpression.

Note: we're missing some move elision in this case. I'll tackle that next.
llvm-svn: 124453

deallocation function has a two-argument form.  Store the result of this
check in new[] and delete[] nodes.

Fixes rdar://problem/8913519

llvm-svn: 124373

My thanks to chapuni for his help in investigating this.

llvm-svn: 124351

referenced in the block-literal initializer
of that variable. // rdar://8893785

llvm-svn: 124332

llvm-svn: 124310

dtor cleanup use it.

llvm-svn: 124309

I'm separately committing this because it incidentally changes some
block orderings and minor IR issues, like using a phi instead of
an unnecessary alloca.

llvm-svn: 124277

llvm-svn: 124227

llvm-svn: 124153

llvm-svn: 124146

llvm-svn: 124122

llvm-svn: 124096

llvm-svn: 124095

llvm-svn: 124094

Mark VTables and RTTI data linkonce_odr instead of weak_odr, with the exception of explicit template instantiations, which have to be weak_odr.

This fixes PR6996.

llvm-svn: 124089

llvm-svn: 124083

clang's -Wuninitialized-experimental warning.
While these don't look like real bugs, clang's
-Wuninitialized-experimental analysis is stricter
than GCC's, and these fixes have the benefit
of being general nice cleanups.

llvm-svn: 124072

llvm-svn: 124029

llvm-svn: 124023

llvm-svn: 124020

Improve on test case. Per Doug's comment. wip.

llvm-svn: 123954

vf calls, be made indirect. This patch is towards that goal.

llvm-svn: 123922

llvm-svn: 123868

thousand other things which were (generally inadvertantly) relying on that.

llvm-svn: 123814

counterparts where char units are needed.

llvm-svn: 123805

llvm-svn: 123802

llvm-svn: 123790

llvm-svn: 123773

For example: 

class A{ 
public:
  A& operator=(const A& that) {
      if (this != &that) {
          this->A::~A();
          this->A::A(that);  // <=== explicit constructor call.
      }
      return *this;
  }
};

More work will be needed to support an explicit call to a template constructor.

llvm-svn: 123735

ASTContext::toCharUnitsFromBits() when converting from bit sizes to char units.

llvm-svn: 123720

-Wint-to-pointer-cast.

llvm-svn: 123719