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LLVM backend for 6502
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7a0d51c8e3
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Evan Cheng 7a0d51c8e3 Fix a long-standing spiller bug: 
If a spillslot value is available in a register, and there is a noop copy that
targets that register, the spiller correctly decide not to invalidate the
spillslot register.

However, even though the noop copy does not clobbers the value. It does start a
new intersecting live range. That means the spillslot register is available for
use but should not be reused for a two-address instruction modref operand which
would clobber the new live range.

When we remove the noop copy, update the available information by clearing the
canClobber bit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32576 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-14 07:54:05 +00:00
autoconf Cleaned setjmp/longjmp lowering interfaces. Now we're producing right 2006-12-10 23:12:42 +00:00
docs Fixed some formatting. 2006-12-09 01:35:43 +00:00
examples Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are 2006-12-07 01:30:32 +00:00
include/llvm fit in 80 cols 2006-12-13 21:56:10 +00:00
lib Fix a long-standing spiller bug: 2006-12-14 07:54:05 +00:00
projects Update for llvm-gcc4 build. 2006-12-13 08:03:25 +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 Remove DSA tests. 2006-12-13 19:39:27 +00:00
tools Remove DSA. 2006-12-13 16:54:24 +00:00
utils Ignore entries with blank names. 2006-12-12 20:55:58 +00:00
win32 Unbreak VC++ build. 2006-12-02 02:22:01 +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 Regenerate. 2006-12-10 23:29:19 +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 Minor technical correction in documentation. 2006-08-21 01:58:57 +00:00
Makefile Undo removal of the runtime libraries. While this may have been a bit 2006-11-17 03:32:33 +00:00
Makefile.common Update comments to reflect new variable names. Patch contributed by 2005-02-14 16:02:19 +00:00
Makefile.config.in Fix a regression that completely broke make install. 2006-12-13 01:15:18 +00:00
Makefile.rules Don't bother with setting the path before running llvm-gcc4, it doesn't 2006-12-10 04:56:38 +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.