mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
2cfdbb2716
long %test(ubyte, short, long %X, long %Y) {
%A = xor long %X, -1
%B = and long %Y, %A
ret long %B
}
to this:
test:
save -96, %sp, %sp
andn %i4, %i2, %i0
andn %i5, %i3, %i1
restore %g0, %g0, %g0
retl
nop
instead of this:
test:
save -96, %sp, %sp
xor %i2, -1, %l0
xor %i3, -1, %l1
and %i4, %l0, %i0
and %i5, %l1, %i1
restore %g0, %g0, %g0
retl
nop
The simpleisel emits: :(
test:
save -96, %sp, %sp
or %g0, -1, %l0
or %g0, -1, %l0
or %g0, -1, %l0
or %g0, -1, %l1
xor %i2, %l0, %l0
xor %i3, %l1, %l1
and %i4, %l0, %i0
and %i5, %l1, %i1
restore %g0, %g0, %g0
retl
nop
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24793 91177308-0d34-0410-b5e6-96231b3b80d8
|
||
|---|---|---|
| .. | ||
| .cvsignore | ||
| DelaySlotFiller.cpp | ||
| FPMover.cpp | ||
| Makefile | ||
| README.txt | ||
| Sparc.h | ||
| Sparc.td | ||
| SparcAsmPrinter.cpp | ||
| SparcInstrFormats.td | ||
| SparcInstrInfo.cpp | ||
| SparcInstrInfo.h | ||
| SparcInstrInfo.td | ||
| SparcISelDAGToDAG.cpp | ||
| SparcRegisterInfo.cpp | ||
| SparcRegisterInfo.h | ||
| SparcRegisterInfo.td | ||
| SparcTargetMachine.cpp | ||
| SparcTargetMachine.h | ||
| SparcV8ISelSimple.cpp | ||
Meta TODO list:
1. Create a new DAG -> DAG instruction selector, by adding patterns to the
instructions.
2. ???
3. profit!
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)
* 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.
* Directly support select instructions, and fold setcc instructions into them
where possible. I think this is what afflicts the inner loop of Olden/tsp
(hot block = tsp():no_exit.1.i, overall GCC/LLC = 0.03).
* Generate fsqrtd for calls to sqrt() (~ 4% speedup on Olden/tsp).
$Date$