6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-18 12:29:27 +00:00
Code Issues Projects Releases Wiki Activity
LLVM backend for 6502
17,048 Commits 39 Branches 0 Tags 277 MiB
C++ 48.7%
LLVM 38.5%
Assembly 10.2%
C 0.9%
Python 0.4%
Other 1.2%
8571637ee9
Go to file
Chris Lattner 8571637ee9 Codegen long >> 2 to this: 
foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        shrd %EAX, %EDX, 2
        sar %EDX, 2
        ret

instead of this:

test1:
        mov %ECX, DWORD PTR [%ESP + 4]
        shr %ECX, 2
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %EAX, %EDX
        shl %EAX, 30
        or %EAX, %ECX
        sar %EDX, 2
        ret

and long << 2 to this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
***     mov %EDX, %EAX
        shrd %EDX, %ECX, 30
        shl %EAX, 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        shr %ECX, 30
        mov %EDX, DWORD PTR [%ESP + 8]
        shl %EDX, 2
        or %EDX, %ECX
        shl %EAX, 2
        ret

The extra copy (marked ***) can be eliminated when I teach the code generator
that shrd32rri8 is really commutative.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19681 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-19 06:18:43 +00:00
autoconf Fix llvm-java project autconfiguration. 2005-01-16 09:44:58 +00:00
docs Fix typos noticed by Gabor Greif, thanks Gabor! 2005-01-17 00:12:04 +00:00
examples Use LLVMLIBS=JIT to get JIT libraries 2004-11-29 07:17:18 +00:00
include/llvm Add missing data types for VC++ 2005-01-19 05:08:31 +00:00
lib Codegen long >> 2 to this: 2005-01-19 06:18:43 +00:00
projects Update per new Makefile requirements for projects 2005-01-16 02:21:42 +00:00
runtime Turn on LOADABLE_MODULE so that profile.so can be loaded dynamically by 2005-01-13 16:53:05 +00:00
test This is a carefully contrived testcase where the X86 ISel is emitting all loads 2005-01-17 23:16:01 +00:00
tools sysconfdir -> PROJ_etcdir 2005-01-17 00:42:31 +00:00
utils Fix the path from ../lib/Debug to ../Debug/lib per changes to Makefiles. 2005-01-14 16:32:39 +00:00
win32 Add project llvm-ld to Visual Studio 2005-01-18 05:44:50 +00:00
.cvsignore Ignore the autom4te.cache directoy. 2004-12-24 15:11:23 +00:00
configure Fix llvm-java project autconfiguration. 2005-01-16 09:44:58 +00:00
CREDITS.TXT Add MMC 2004-11-18 21:04:21 +00:00
LICENSE.TXT Another year, another copyright update. 2005-01-08 19:10:44 +00:00
llvm.spec
llvm.spec.in
Makefile Remove the check target. Its now in Makefile.rules 2004-12-06 05:35:00 +00:00
Makefile.common Make this file capable of being used by both LLVM and its projects 2005-01-16 02:20:30 +00:00
Makefile.config.in Don't confuse the LLVM_OBJ_DIR and the PROJ_OBJ_DIR because there might be 2005-01-16 06:53:48 +00:00
Makefile.rules Several changes: 2005-01-16 02:20:54 +00:00
README.txt Make the text of this file a little more useful. 2004-09-02 22:49:27 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level 
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments. 

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the HTML documentation provided in docs/index.html for further
assistance with LLVM.