implements something out of Target/README.txt producing:

_foo:                                                       ## @foo
	movl	4(%esp), %eax
	movapd	LCPI1_0, %xmm0
	movapd	%xmm0, (%eax)
	ret	$4

instead of:

_foo:                                                       ## @foo
	movl	4(%esp), %eax
	movapd	_b, %xmm0
	mulpd	LCPI1_0, %xmm0
	addpd	_a, %xmm0
	movapd	%xmm0, (%eax)
	ret	$4

llvm-svn: 84942

bytes (i256).

llvm-svn: 84941

non-type-safe constant initializers.  This sort of thing happens
quite a bit for 4-byte loads out of string constants, unions, 
bitfields, and an interesting endianness check from sqlite, which
is something like this:

const int sqlite3one = 1;
# define SQLITE_BIGENDIAN    (*(char *)(&sqlite3one)==0)
# define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)

all of these macros now constant fold away.

This implements PR3152 and is based on a patch started by Eli, but heavily
modified and extended.

llvm-svn: 84936

llvm-svn: 84934

llvm-svn: 84932

llvm-svn: 84931

llvm-svn: 84930

they don't get lost; I don't think the originator has
write access.

llvm-svn: 84928

identifier.  This caused a crash when reading PCH files that contained
long identifier names.

The issue is that 'StrLenPtr' was previously a 'const char *', meaning
the byte loaded from it would be interpretted as a signed integer.  If
the topmost bit was set, conversion to 'unsigned' would extend that
bit, causing an overflow.

The solution is to make 'StrLenPtr' an 'unsigned char *', always
treating the value as an unsigned integer.

This fixes: <rdar://problem/7328900>

llvm-svn: 84925

llvm-svn: 84924

llvm-svn: 84923

llvm-svn: 84922

llvm-svn: 84921

one was PCH'ed without any.

llvm-svn: 84920

llvm-svn: 84919

does.

llvm-svn: 84916

Just r84734 now that some fundamental work has been completed.

llvm-svn: 84914

llvm-svn: 84913

Allow the target to select the level of anti-dependence breaking that should be performed by the post-RA scheduler. The default is none.

llvm-svn: 84911

both scalar and aggregates.

llvm-svn: 84910

llvm-svn: 84909

the DeclaratorInfo, one for semantic analysis), just build a single type whose
canonical type will reflect the semantic analysis (assuming the type is
well-formed, of course).

To make that work, make a few changes to the type system:
* allow the nominal pointee type of a reference type to be a (possibly sugared)
  reference type.  Also, preserve the original spelling of the reference type.
  Both of these can be ignored on canonical reference types.
* Remove ObjCProtocolListType and preserve the associated source information on
  the various ObjC TypeLocs.  Preserve the spelling of protocol lists except in
  the canonical form.
* Preserve some level of source type structure on parameter types, but
  canonicalize on the canonical function type.  This is still a WIP.

Drops code size, makes strides towards accurate source location representation,
slight (~1.7%) progression on Cocoa.h because of complexity drop.

llvm-svn: 84907

Always emit error diagnostics when an error occurs within clang_createTranslationUnit() and clang_createTranslationUnitFromSource().  These kind of errors are ones that shouldn't be missed.

llvm-svn: 84904

Use 'waitpid' instead of 'wait'.  Basing Program::Wait() on 'wait()' prevents it being correct within a multithreaded context.

This address: PR 5277 (Program::Wait is unsafe to call from multiple threads).

Note: If waitpid() turns out to be non-portable, we can add more autoconf magic, or look into
another solution.

llvm-svn: 84903

gcc-4.4.

llvm-svn: 84902

llvm-svn: 84900

llvm-svn: 84898

llvm-svn: 84895

llvm-svn: 84894

llvm-svn: 84893

llvm-svn: 84892

llvm-svn: 84891

even when keys get RAUWed and deleted during its lifetime. By default the keys
act like WeakVHs, but users can pass a third template parameter to configure
how updates work and whether to do anything beyond updating the map on each
action.

It's also possible to automatically acquire a lock around ValueMap updates
triggered by RAUWs and deletes, to support the ExecutionEngine.

llvm-svn: 84890

llvm-svn: 84889

llvm-svn: 84888

llvm-svn: 84886

llvm-svn: 84885

llvm-svn: 84884

When replacing a template-id expression with a declaration reference expression after overloading completes, make sure to keep the qualifier. Still not ready with that test-case...

llvm-svn: 84880

llvm-svn: 84878