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llvm-svn: 46979
This commit is contained in:
Nate Begeman 2008-02-11 23:47:56 +00:00
parent b7bbe43ad3
commit 5c59b16468
1 changed files with 7 additions and 65 deletions
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72
lib/Target/IA64/README
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*** 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:
****************************************************************
* @@@ @@@ @@@ @@@ @@@@@@@@@@ *
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* @@! @@! @@! @@@ @@! @@! @@! *
* !@! !@! !@! @!@ !@! !@! !@! *
* @!! @!! @!@ !@! @!! !!@ @!@ *
* !!! !!! !@! !!! !@! ! !@! *
* !!: !!: :!: !!: !!: !!: *
* :!: :!: ::!!:! :!: :!: *
* :: :::: :: :::: :::: ::: :: *
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* *
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* !@! @!@ !@!!@!@! !@! !@! @!@ !@! !@!!@! *
* @!@ !@! @!@ !!@! !!@ @!@!@!@! !!@@!@! @!! @!! *
* !@! !!! !@! !!! !!! !!!@!!!! @!!@!!!! !!! !@! *
* !!: !!! !!: !!! !!: !!: !!! !:! !:! :!!:!:!!: *
* :!: !:! :!: !:! :!: :!: !:! :!: !:! !:::!!::: *
* ::::: :: :: :: :: :: ::: :::: ::: ::: *
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* *
****************************************************************
* 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:
- Un-bitrot ISel
- Hook up If-Conversion a la ARM target
- Hook up all branch analysis functions
- Instruction scheduling
- Bundling
- Dynamic Optimization
- Testing and bugfixing
- 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.
@ -65,14 +17,11 @@ TODO:
(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
@ -80,7 +29,6 @@ INFO:
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
@ -90,17 +38,11 @@ KNOWN DEFECTS AT THE CURRENT TIME:
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.