preference; no functional change.

llvm-svn: 78391

Patch by Jakub Staszak.

llvm-svn: 78388

llvm-svn: 78383

llvm-svn: 78382

llvm-svn: 78381

i386-apple-darwin9. This presumably will get fixed once the generated code
improves.

llvm-svn: 78379

 - Still not very sane, but a least its not 60k lines on X86. :)

 - In terms of correctness, currently some things are hard wired for X86, and we
   still don't properly resolve ambiguities (this is ignoring the instructions
   we don't even match due to funny .td stuff or other corner cases).

The high level changes:
 1. Represent tokens which are significant for matching explicitly as separate
    operands. This uniformly handles not only the instruction mnemonic, but
    also 'signficiant' syntax like the '*' in "call * ...".

 2. Separate the matching of operands to an instruction from the construction of
    the MCInst. In theory this can be done during matching, but since the number
    of variations is small I think it makes sense to decompose the problems.

 3. Improved a few of the mechanisms to at least successfully flatten / tokenize
    the assembly strings for PowerPC and ARM.

 4. The comment at the top of AsmMatcherEmitter.cpp explains the approach I'm
    moving towards for handling ambiguous instructions. The high-bit is to infer
    a partial ordering of the operand classes (and force the user to specify one
    if we can't) and use that to resolve ambiguities.

llvm-svn: 78378

llvm-svn: 78377

Another coalescer bug. When a dead copy is eliminated, transfer the kill to a def of the exact register rather than a super-register.

llvm-svn: 78376

llvm-svn: 78370

llvm-svn: 78369

llvm-svn: 78367

llvm-svn: 78366

llvm-svn: 78365

llvm-svn: 78363

llvm-svn: 78362

It turns out most of the thumb2 instructions are not allowed to touch SP. The semantics of such instructions are unpredictable. We have just been lucky that tests have been passing.

This patch takes pain to ensure all the PEI lowering code does the right thing when lowering frame indices, insert code to manipulate stack pointers, etc. It's also custom lowering dynamic stack alloc into pseudo instructions so we can insert the right instructions at scheduling time.

This fixes PR4659 and PR4682.

llvm-svn: 78361

llvm-svn: 78360

Added legal stuff, fixed some formatting issues. Removed the graph generator stuff as it was only meant for debugging the solver.

llvm-svn: 78359

New C++ PBQP solver. Currently about as fast (read _slow_) as the old C based solver, but I'll be working to improve that. The PBQP allocator has been updated to use the new solver.

llvm-svn: 78354

produced a CFG it wasn't prepared for.

llvm-svn: 78351

llvm-svn: 78350

module as first argument.

llvm-svn: 78340

If we need it one day, there is nothing wrong with putting it back in.

llvm-svn: 78337

llvm-svn: 78335

llvm-svn: 78334

llvm-svn: 78333

llvm-svn: 78330

Add parameter to pattern classes to enable an itinerary to be specified for instructions. For now just use the existing itineraries or NoItinerary.

llvm-svn: 78321

creation activity into the target-specific subclasses of TLOF.
Before this, globals with explicit sections could be created by
the base class.

1. make getOrCreateSection protected, add a new getExplicitSectionGlobal
   pure virtual method to assign sections to globals with a specified
   section.
2. eliminate getSpecialCasedSectionGlobals, which is now PIC specific.
3. eliminate the getKindForNamedSection virtual method, which is
   now just a static method for ELF.
4. Add implementions of getExplicitSectionGlobal for ELF/PECOFF/Darwin/PIC16.
   They are now all detangled and understandable, woo! :)

llvm-svn: 78319

- start support for new PEI w/reg alloc, allow running RS from emit{Pro,Epi}logue() target hooks.
- fix minor issue with recursion detection.

llvm-svn: 78318

creating them directly in the pic16 asmprinter.

llvm-svn: 78317

and LowerReturn, to verify that the targets' hooks have respected some
of their postconditions.

llvm-svn: 78312

types don't have any return values, from CodeGen's perspective.
This fixes PR4688.

llvm-svn: 78311

llvm-svn: 78299

by aggressive chain operand optimization. UpdateNodeOperands
does not modify the node in place if it would result in
a node identical to an existing node.

llvm-svn: 78297

and high-bits values in ways that weren't correct for integer
types wider than 64 bits. This fixes a miscompile in
PPMacroExpansion.cpp in clang on x86-64.

llvm-svn: 78295

llvm-svn: 78293

 - This also fixes the ENABLE_EXPENSIVE_CHECKS failure on vmcore.ml.

llvm-svn: 78287

As suggested by Nick Lewycky.

llvm-svn: 78277