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llvm-6502/lib/Target/IA64
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Evan Cheng a844bdeab3 SDIsel processes llvm.dbg.declare by recording the variable debug information descriptor and its corresponding stack frame index in MachineModuleInfo. This only works if the local variable is "homed" in the stack frame. It does not work for byval parameter, etc. 
Added ISD::DECLARE node type to represent llvm.dbg.declare intrinsic. Now the intrinsic calls are lowered into a SDNode and lives on through out the codegen passes.
For now, since all the debugging information recording is done at isel time, when a ISD::DECLARE node is selected, it has the side effect of also recording the variable. This is a short term solution that should be fixed in time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46659 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-02 04:07:54 +00:00
..
IA64.h Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64.td Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64AsmPrinter.cpp Use getPreferredAlignmentLog or getPreferredAlignment 2008-01-29 06:23:44 +00:00
IA64Bundling.cpp Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64InstrBuilder.h Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64InstrFormats.td Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64InstrInfo.cpp remove MachineOpCode typedef. 2008-01-07 02:48:55 +00:00
IA64InstrInfo.h Move some more instruction creation methods from RegisterInfo into InstrInfo. 2008-01-01 21:11:32 +00:00
IA64InstrInfo.td rename isLoad -> isSimpleLoad due to evan's desire to have such a predicate. 2008-01-06 23:38:27 +00:00
IA64ISelDAGToDAG.cpp SDIsel processes llvm.dbg.declare by recording the variable debug information descriptor and its corresponding stack frame index in MachineModuleInfo. This only works if the local variable is "homed" in the stack frame. It does not work for byval parameter, etc. 2008-02-02 04:07:54 +00:00
IA64ISelLowering.cpp Revert 46556 and 46585. Dan please fix the PseudoSourceValue problem and re-commit. 2008-01-31 21:00:00 +00:00
IA64ISelLowering.h Even though InsertAtEndOfBasicBlock is an ugly hack it still deserves a proper name. Rename it to EmitInstrWithCustomInserter since it does not necessarily insert 2008-01-30 18:18:23 +00:00
IA64MachineFunctionInfo.h
IA64RegisterInfo.cpp Move some more instruction creation methods from RegisterInfo into InstrInfo. 2008-01-01 21:11:32 +00:00
IA64RegisterInfo.h Move some more functionality from MRegisterInfo to TargetInstrInfo. 2008-01-04 23:57:37 +00:00
IA64RegisterInfo.td Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64TargetAsmInfo.cpp Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64TargetAsmInfo.h Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64TargetMachine.cpp Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
IA64TargetMachine.h Remove attribution from file headers, per discussion on llvmdev. 2007-12-29 20:36:04 +00:00
Makefile remove attribution from lib Makefiles. 2007-12-29 20:09:26 +00:00
README If a function is vararg, never pass inreg arguments in registers. Thanks to 2007-06-19 00:13:10 +00:00

README 

*** README for the LLVM IA64 Backend "Version 0.01" - March 18, 2005
*** Quote for this version:

      "Kaori and Hitomi are naughty!!"


Congratulations, you have found:

**************************************************************** 
* @@@       @@@       @@@  @@@  @@@@@@@@@@                     *
* @@@       @@@       @@@  @@@  @@@@@@@@@@@                    *
* @@!       @@!       @@!  @@@  @@! @@! @@!                    *
* !@!       !@!       !@!  @!@  !@! !@! !@!                    *
* @!!       @!!       @!@  !@!  @!! !!@ @!@                    *
* !!!       !!!       !@!  !!!  !@!   ! !@!                    *
* !!:       !!:       :!:  !!:  !!:     !!:                    *
*  :!:       :!:       ::!!:!   :!:     :!:                    *
*  :: ::::   :: ::::    ::::    :::     ::                     *
* : :: : :  : :: : :     :       :      :                      *
*                                                              *
*                                                              *
*  @@@@@@   @@@  @@@       @@@   @@@@@@     @@@@@@       @@@   *
* @@@@@@@@  @@@@ @@@       @@@  @@@@@@@@   @@@@@@@      @@@@   *
* @@!  @@@  @@!@!@@@       @@!  @@!  @@@  !@@          @@!@!   *
* !@!  @!@  !@!!@!@!       !@!  !@!  @!@  !@!         !@!!@!   *
* @!@  !@!  @!@ !!@!       !!@  @!@!@!@!  !!@@!@!    @!! @!!   *
* !@!  !!!  !@!  !!!       !!!  !!!@!!!!  @!!@!!!!  !!!  !@!   *
* !!:  !!!  !!:  !!!       !!:  !!:  !!!  !:!  !:!  :!!:!:!!:  *
* :!:  !:!  :!:  !:!       :!:  :!:  !:!  :!:  !:!  !:::!!:::  *
* ::::: ::   ::   ::        ::  ::   :::  :::: :::       :::   *
*  : :  :   ::    :        :     :   : :   :: : :        :::   *
*                                                              *
****************************************************************
* Bow down, bow down, before the power of IA64! Or be crushed, *
* be crushed, by its jolly registers of doom!!                 *
****************************************************************

DEVELOPMENT PLAN:

   _  you are       2005           maybe 2005       2006            2006 and
  /   here            |               |              |               beyond 
 v                    v               v              v                |
                                                                      v
CLEAN UP        ADD INSTRUCTION      ADD          PLAY WITH
INSTRUCTION --> SCHEDULING AND  -->  JIT    -->    DYNAMIC     --> FUTURE WORK
SELECTION       BUNDLING            SUPPORT     REOPTIMIZATION

DISCLAIMER AND PROMISE:

As of the time of this release, you are probably better off using Intel C/C++
or GCC. The performance of the code emitted right now is, in a word,
terrible. Check back in a few months - the story will be different then,
I guarantee it.

TODO:

  - stop passing FP args in both FP *and* integer regs when not required
  - allocate low (nonstacked) registers more aggressively
  - clean up and thoroughly test the isel patterns.
  - fix stacked register allocation order: (for readability) we don't want
    the out? registers being the first ones used
  - fix up floating point
    (nb http://gcc.gnu.org/wiki?pagename=ia64%20floating%20point )
  - bundling!
    (we will avoid the mess that is:
     http://gcc.gnu.org/ml/gcc/2003-12/msg00832.html )
  - instruction scheduling (hmmmm! ;)
  - write truly inspirational documentation
  - if-conversion (predicate database/knowledge? etc etc)
  - counted loop support
  - make integer + FP mul/div more clever (we have fixed pseudocode atm)
  - track and use comparison complements

INFO:

  - we are strictly LP64 here, no support for ILP32 on HP-UX. Linux users
    don't need to worry about this.
  - i have instruction scheduling/bundling pseudocode, that really works
    (has been tested, albeit at the perl-script level).
    so, before you go write your own, send me an email!

KNOWN DEFECTS AT THE CURRENT TIME:

  - C++ vtables contain naked function pointers, not function descriptors,
  which is bad. see http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=406
  - varargs are broken
  - alloca doesn't work (indeed, stack frame layout is bogus)
  - no support for big-endian environments
  - (not really the backend, but...) the CFE has some issues on IA64.
    these will probably be fixed soon.
  
ACKNOWLEDGEMENTS:

  - Chris Lattner (x100)
  - Other LLVM developers ("hey, that looks familiar")

CONTACT:

  - You can email me at duraid@octopus.com.au. If you find a small bug,
    just email me. If you find a big bug, please file a bug report
    in bugzilla! http://llvm.cs.uiuc.edu is your one stop shop for all
    things LLVM.