Model inline asm constraint which ties an input to an output register as machine operand TIED_TO constraint. This eliminated the need to pre-allocate registers for these. This also allows register allocator can eliminate the unneeded copies.

llvm-svn: 67512

Do not fold away subreg_to_reg if the source register has a sub-register index. That means the source register is taking a sub-register of a larger register. e.g. On x86
%RAX<def> = ...
%RAX<def> = SUBREG_TO_REG 0, %EAX:3<kill>, 3
The first def is defining RAX, not EAX so the top bits were not zero-extended.

llvm-svn: 67511

llvm-svn: 67510

were when we came around, not to their default handler.  This 
should fix PR3848

llvm-svn: 67509

llvm-svn: 67508

llvm-svn: 67507

llvm-svn: 67505

Do not recommend llvm::OStream anymore.  Use raw_ostream or MemoryBuffer.

llvm-svn: 67504

i8 return values.

llvm-svn: 67502

llvm-svn: 67500

llvm-svn: 67473

work.

llvm-svn: 67471

llvm-svn: 67469

llvm-svn: 67468

llvm-svn: 67458

llvm-svn: 67454

llvm-svn: 67451

unneeded bitcast is requested.  This is common for frontends who just unconditionally
cast even if the target is often the right type already.  THis prevents going into
getFoldedCast which switches on the opcode and does a bunch of other stuff before
doing the same opzn.

llvm-svn: 67435

tidy some df iteration stuff, patch by John Mosby!

llvm-svn: 67428

Handle odd registers allocation in FGR32.

llvm-svn: 67422

llvm-svn: 67416

llvm-svn: 67412

shifts together.  This fixes PR3851.

llvm-svn: 67411

linkage: the value may be replaced with something
different at link time.  (Frontends that want to
allow values to be loaded out of weak constants can
give their constants weak_odr linkage).

llvm-svn: 67407

llvm-svn: 67400

For inline asm output operand that matches an input. Encode the input operand index in the high bits.

llvm-svn: 67387

llvm-svn: 67373

llvm-svn: 67372

Removed unncessary code. No functionality change.

llvm-svn: 67371

llvm-svn: 67370

llvm-svn: 67368

llvm-svn: 67364

for those architectures that support the instruction.

llvm-svn: 67363

(return or unreachable) is a kill.

llvm-svn: 67357

llvm-svn: 67349

 - Make type declarations match the struct/class keyword of the definition.
 - Move AddSignalHandler into the namespace where it belongs.
 - Correctly call functions from template base.
 - Some other small changes.
With this patch, LLVM and Clang should build properly and with far less noise under VS2008.

llvm-svn: 67347

llvm-svn: 67335

More makefile changes to allow dejagnu tests to pass when system tools default to a different target from the llvm configuration (e.g. 64-bit gcc and 32-bit llvm).

llvm-svn: 67334

llvm-svn: 67326

llvm-svn: 67319