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LLVM backend for 6502
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54e853b8a6
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Chris Lattner 54e853b8a6 Rewrite the branch selector to be correct in the face of large functions. 
The algorithm it used before wasn't 100% correct, we now use an iterative
expansion model.  This fixes assembler errors when compiling 403.gcc with
tail merging enabled.

Change the way the branch selector works overall: Now, the isel generates
PPC::BCC instructions (as it used to) directly, and these BCC instructions
are emitted to the output or jitted directly if branches don't need
expansion.  Only if branches need expansion are instructions rewritten
and created.  This should make branch select faster, and eliminates the
Bxx instructions from the .td file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31837 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-18 00:32:03 +00:00
autoconf Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
docs Cleaned up the document. Added "doc_code" divisions for code examples. 2006-11-16 09:31:19 +00:00
examples For PR950: 2006-10-20 07:07:24 +00:00
include/llvm Hopefully a good crack at making debugging work on intel -disable-fp-elim. 2006-11-17 21:19:15 +00:00
lib Rewrite the branch selector to be correct in the face of large functions. 2006-11-18 00:32:03 +00:00
projects For PR950: 2006-11-08 06:47:33 +00:00
runtime Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
test Add a x86-64 test case: movb %sil, %ah is illegal. 2006-11-17 20:41:55 +00:00
tools Need <iostream> for the time being. 2006-11-17 10:09:22 +00:00
utils Add opcode to TargetInstrDescriptor. 2006-11-17 01:46:27 +00:00
win32 Remove obsolete VS project. 2006-11-05 19:38:20 +00:00
Xcode Try again. 2006-11-05 21:21:20 +00:00
.cvsignore Add llvm.spec, a generated file. 2006-10-18 19:23:56 +00:00
configure Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
CREDITS.TXT The list is sorted by name. 2006-08-29 01:42:47 +00:00
LICENSE.TXT burg is gone 2006-09-11 17:28:11 +00:00
llvm.spec.in
Makefile Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
Makefile.common
Makefile.config.in Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
Makefile.rules Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
README.txt

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.