expecting so much concentrated oddity on what seemed like a
trivial feature.  Thanks to François Pichet for doing the
MSVC legwork here.

llvm-svn: 134813

llvm-svn: 134785

  - Emit default-initialization of arrays that were partially initialized
    with initializer lists with a loop, rather than emitting the default
    initializer N times;
  - support destroying VLAs of non-trivial type, although this is not
    yet exposed to users; and
  - support the partial destruction of arrays initialized with
    initializer lists when an initializer throws an exception.

llvm-svn: 134784

Note that because we don't usually touch the MMX registers anyway, all -mno-mmx needs to do is tweak the x86-32 calling convention a little for vectors that look like MMX vectors, and prevent the definition of __MMX__.

clang doesn't actually stop the user from using MMX inline asm operands or MMX builtins in -mno-mmx mode; as a QOI issue, it would be nice to diagnose, but I doubt it really matters much.

<rdar://problem/9694837>

llvm-svn: 134770

llvm-svn: 134765

llvm-svn: 134761

llvm-svn: 134754

llvm-svn: 134743

the normal case.

Before, for this:

$ cat t.c
int test(int x) { return x * 2; }

We would get this:

   addl  %edi, %edi
   jno   LBB0_2
## BB#1:                                ## %overflow
   ud2
LBB0_2:                                 ## %nooverflow
   movl    %edi, %eax
   popq    %rbp
   ret

Now we get this:

   addl   %edi, %edi
   jo     LBB0_2
## BB#1:                                ## %nooverflow
   movl                                 %edi, %eax
   popq                                 %rbp
   ret
LBB0_2:                                 ## %overflow
   ud2

<rdar://problem/8283919>

llvm-svn: 134642

so roll it out.

llvm-svn: 134638

function. Fixes PR10233!

llvm-svn: 134634

If we're using the pure non-fragile ABI, then skip some of the contortions required to support the transitional ABI.

llvm-svn: 134612

Set a flag to tell the runtime when we're compiling in ARC mode and use the pure-nonfragile ABI for both ARC and GC mode.

llvm-svn: 134611

where we have an immediate need of a retained value.

As an exception, don't do this when the call is made as the immediate
operand of a __bridge retain.  This is more in the way of a workaround
than an actual guarantee, so it's acceptable to be brittle here.

rdar://problem/9504800

llvm-svn: 134605

llvm-svn: 134589

llvm-svn: 134536

exception in Objective-C;  in Objective-C++ we still use std::terminate().
This is only available in very recent runtimes.

llvm-svn: 134456

structure to hold inferred information, then propagate each invididual
bit down to -cc1.  Separate the bits of "supports weak" and "has a native
ARC runtime";  make the latter a CodeGenOption.

The tool chain is still driving this decision, because it's the place that
has the required deployment target information on Darwin, but at least it's
better-factored now.

llvm-svn: 134453

hardwired into the default pass list.

llvm-svn: 134445

The start of some work on getting -mno-mmx working the way we want it to.

llvm-svn: 134300

Fixes rdar://9714064

llvm-svn: 134292

initializer. Previously, we only used guard variables for weak static
data members. Fixes <rdar://problem/9692249>.

llvm-svn: 134266

trivial default constructors. This generated-code regression was
caused by r131796, which had simplified the handling of default
initialization in Sema. Fixes <rdar://problem/9694300>.

llvm-svn: 134260

llvm-svn: 134140

llvm-svn: 134128

accessibility of an initializer which is a compound 
statement. // rdar://9694706

llvm-svn: 134091

replacing -freset-local-blocks. // rdar://9227352

llvm-svn: 134082

llvm-svn: 134065

We don't pass classes with a copy-constructor or destructor byval, so the address takes up an integer register (if one is available).  Make sure the x86-64 ABI implementation takes that into account properly.

The fixed implementation is compatible with the implementation both gcc and llvm-gcc use.

rdar://9686430 . (This is the issue that was reported in the thread "[LLVMdev] Segfault calling LLVM libs from a clang-compiled executable".)

llvm-svn: 134059

llvm-svn: 134050

wipe out stack blocks when they go out of scope.
// rdar://9227352

llvm-svn: 134045

Fixes rdar://9281377

llvm-svn: 134016

a vector for collection. Use iterators where needed instead.
// rdar://6817577

llvm-svn: 134015

llvm-svn: 133943

llvm-svn: 133931

llvm-svn: 133864

llvm-svn: 133861

by removing the redundant type parameter.

llvm-svn: 133860

arithmetic on a VLA as 'nsw', per discussion with djg, and
implement pointer arithmetic (other than array accesses) and
pointer subtraction for VLA types.

llvm-svn: 133855

in the variable to an inline asm which gets run when the variable
goes out of scope.

llvm-svn: 133840