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llvm-6502/lib/Target/Sparc
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Chris Lattner e171d5c812 Add some notes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18911 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-13 20:13:10 +00:00
..
DelaySlotFiller.cpp Use TargetMachine::hasDelaySlot() instead of our old switch statement 2004-09-30 04:04:47 +00:00
FPMover.cpp When FpMOVDs appeared in pairs, we were mistakenly skipping over the latter of 2004-12-10 04:42:45 +00:00
Makefile Adjust paths: Sparc/V8 --> SparcV8 2004-12-10 04:48:57 +00:00
README.txt Add some notes 2004-12-13 20:13:10 +00:00
Sparc.h
Sparc.td Adjust paths: Sparc/V8 --> SparcV8 2004-12-10 04:48:57 +00:00
SparcAsmPrinter.cpp Fix asm-printing directives (how did we not see this before...apparently, 2004-12-09 18:51:01 +00:00
SparcInstrFormats.td Class F2_1 already inherits the imm22 field from class F2 2004-10-14 22:32:24 +00:00
SparcInstrInfo.cpp Look for many more moves to fold (previously, we only 2004-12-11 05:19:03 +00:00
SparcInstrInfo.h
SparcInstrInfo.td Add the rest of the multiply instructions. 2004-12-10 08:39:29 +00:00
SparcRegisterInfo.cpp Remove dependency on MRegisterInfo::getRegClass 2004-10-29 21:42:27 +00:00
SparcRegisterInfo.h
SparcRegisterInfo.td Make this file self-contained. 2004-12-10 04:46:30 +00:00
SparcTargetMachine.cpp Use the target triple to pick this target. 2004-12-12 17:40:28 +00:00
SparcTargetMachine.h Implement getModuleMatchQuality and getJITMatchQuality so that v8 will be the 2004-10-09 05:57:01 +00:00
SparcV8CodeEmitter.cpp This code rotted - change it to call abort() until someone wants 2004-12-03 06:57:14 +00:00
SparcV8ISelSimple.cpp Finally enable the setcc-branch folding code. 2004-12-12 07:42:58 +00:00
SparcV8JITInfo.h

README.txt 

SparcV8 backend skeleton
------------------------

This directory houses a 32-bit SPARC V8 backend employing an expander-based
instruction selector.  It is not yet functionally complete.  Watch
this space for more news coming soon!

Current expected test failures
------------------------------

Here are the currently-expected SingleSource failures for V8
(Some C++ programs are crashing in libstdc++ at the moment;
I'm not sure why.)

  (llc) SingleSource/Regression/C++/EH/exception_spec_test
  (llc) SingleSource/Regression/C++/EH/throw_rethrow_test

Here are the currently-expected MultiSource failures for V8:

  (llc,cbe) MultiSource/Applications/d/make_dparser
  (llc,cbe) MultiSource/Applications/hexxagon
  (llc) MultiSource/Benchmarks/Fhourstones
  (llc,cbe) MultiSource/Benchmarks/McCat/03-testtrie
  (llc) MultiSource/Benchmarks/McCat/18-imp
  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/bison/mybison
  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/fixoutput
  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/gnugo
  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/plot2fig
  (llc,cbe) MultiSource/Benchmarks/Ptrdist/anagram
  (llc,cbe) MultiSource/Benchmarks/FreeBench/analyzer
    * DANGER * analyzer will run the machine out of VM
  (I don't know whether the following fail in cbe:)
  (llc) MultiSource/Benchmarks/FreeBench/distray
  (llc) MultiSource/Benchmarks/FreeBench/fourinarow
  (llc) MultiSource/Benchmarks/FreeBench/pifft
  (llc) MultiSource/Benchmarks/MallocBench/gs
  (llc) MultiSource/Benchmarks/Prolangs-C++/deriv1
  (llc) MultiSource/Benchmarks/Prolangs-C++/deriv2

Known SPEC failures for V8 (probably not an exhaustive list):

  (llc) 134.perl
  (llc) 177.mesa
  (llc) 188.ammp -- FPMover bug?
  (llc) 256.bzip2
  (llc,cbe) 130.li
  (native,llc,cbe) 126.gcc
  (native,llc,cbe) 255.vortex

To-do
-----

* support shl on longs (fourinarow needs this)
* support casting 64-bit integers to FP types (fhourstones needs this)
* support FP rem (call fmod)

* Eliminate srl/sll by zero bits like this:
        sll %l0, 0, %l0
        srl %l0, 0, %o0

  We think these are only used by V9 to clear off the top 32 bits of a reg,
  so they are not needed.

* Keep the address of the constant pool in a register instead of forming its
  address all of the time.

* Change code like this:
        or      %o0, %lo(.CPI_main_0), %o0
        ld      [%o0+0], %o0
  into:
        ld	[%o0+%lo(.CPI_main_0)], %o0
  for constant pool access.

* We can fold small constant offsets into the %hi/%lo references to constant
  pool addresses as well.

$Date$