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LLVM backend for 6502
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a16d4429e4
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Evan Cheng a16d4429e4 Watch out for cases like this: 
entry (0x8b056f0, LLVM BB @0x8b01b30, ID#0):
Live Ins: %r0 %r1 %r2 %r3
        %reg1032 = tMOVrr %r3<kill>
        %reg1033 = tMOVri8 1
        %reg1034 = tMOVri8 0
        tCMPi8 %reg1029<kill>, 0
        tBcc mbb<entry,0x8b06a10>, 0
    Successors according to CFG: 0x8b06980 0x8b06a10

entry (0x8b06980, LLVM BB @0x8b01b30, ID#12):
    Predecessors according to CFG: 0x8b056f0
        %reg1036 = tMOVrr %reg1034<kill>
    Successors according to CFG: 0x8b06a10

entry (0x8b06a10, LLVM BB @0x8b01b30, ID#13):
    Predecessors according to CFG: 0x8b056f0 0x8b06980
        %reg1024<dead> = tMOVrr %reg1030<kill>
        ...

reg1030 and r1 have already been joined. When reg1024 and reg1030 are joined,
r1 live range from function entry to the tMOVrr instruction are dead. Eliminate
r1 from the livein set of the entry BB, not the BB where the copy is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34866 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-03 02:18:00 +00:00
autoconf Add possibility to set memory limit for binaries run via libSystem. This 2007-02-16 19:11:07 +00:00
docs grammaro 2007-03-02 02:57:34 +00:00
examples eliminate vector-related ctors 2007-02-13 06:06:26 +00:00
include Add isPositive for symmetry with isNegative. 2007-03-03 00:24:39 +00:00
lib Watch out for cases like this: 2007-03-03 02:18:00 +00:00
projects avoid collision with /usr/bin/sample if this ever gets installed. 2007-02-18 03:03:41 +00:00
runtime crtend is only for llvm-gcc3, remove it. 2007-02-23 19:34:09 +00:00
test Add a new test case. 2007-03-02 10:37:19 +00:00
tools Make output for ConstantInt construction correct for any bitwidth. 2007-03-01 20:55:43 +00:00
utils rename some CCActions 2007-02-28 05:29:06 +00:00
win32 Unbreak VC++ build. 2007-01-15 20:27:18 +00:00
Xcode Update project 2007-01-29 18:45:08 +00:00
.cvsignore Add llvm.spec, a generated file. 2006-10-18 19:23:56 +00:00
configure Regenerate for getrlimit/setrlimit. 2007-02-16 19:17:20 +00:00
CREDITS.TXT Added myself 2007-02-27 10:44:42 +00:00
LICENSE.TXT remove these. 2007-02-25 02:28:21 +00:00
llvm.spec.in Minor technical correction in documentation. 2006-08-21 01:58:57 +00:00
Makefile revert r1.68. This breaks 'make install' without doing 'make' first, but 2007-02-21 06:23:20 +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 For PR739: 2007-01-17 20:24:45 +00:00
Makefile.rules correct dependency 2007-02-28 05:10:40 +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.