llvm-6502

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LLVM backend for 6502

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Chris Lattner 30ba5690cf This patch implements two things (sorry). First, it allows SRA of globals that have embedded arrays, implementing GlobalOpt/globalsra-partial.llx. This comes up infrequently, but does allow, for example, deleting several stores to dead parts of globals in dhrystone. Second, this implements GlobalOpt/malloc-promote-.llx, which is the following nifty transformation: Basically if a global pointer is initialized with malloc, and we can tell that the program won't notice, we transform this: struct foo FooPtr; ... FooPtr = malloc(sizeof(struct foo)); ... FooPtr->A FooPtr->B Into: struct foo FooPtrBody; ... FooPtrBody.A FooPtrBody.B This comes up occasionally, for example, the 'disp' global in 183.equake (where the xform speeds the CBE version of the program up from 56.16s to 52.40s (7%) on apoc), and the 'desired_accept', 'fixLRBT', 'macroArray', & 'key_queue' globals in 300.twolf (speeding it up from 22.29s to 21.55s (3.4%)). The nice thing about this xform is that it exposes the resulting global to global variable optimization and makes alias analysis easier in addition to eliminating a few loads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16916 91177308-0d34-0410-b5e6-96231b3b80d8		2004-10-11 05:54:41 +00:00
autoconf	Directory changes	2004-10-10 22:17:02 +00:00
docs	Fix grammaro	2004-10-09 19:37:02 +00:00
examples	Build BFtoLLVM example front-end by default	2004-10-05 18:05:53 +00:00
include/llvm	Get friendly with Type	2004-10-07 19:21:43 +00:00
lib	This patch implements two things (sorry).	2004-10-11 05:54:41 +00:00
projects	Remove exhuberant-style comments which remained from copying file from `sample'	2004-10-11 00:56:41 +00:00
runtime	Don't call memset if malloc returns a null pointer	2004-10-06 23:08:03 +00:00
test	This testcase ensures that we can SRA a global even if part of the global	2004-10-11 05:00:30 +00:00
tools	Don't miss global optimizations because we run before the inliner	2004-10-11 04:47:18 +00:00
utils	Initial version of automake Makefile.am file.	2004-10-10 22:07:57 +00:00
.cvsignore	Ok, try #2 , this time I'll not be stupid	2003-08-03 18:33:24 +00:00
configure	Add checks for the ZLIB and BZIP2 header files, not just the libraries.	2004-10-04 22:05:53 +00:00
configure_am	A configure script to configure LLVM for compilation with automake	2004-10-10 22:16:50 +00:00
CREDITS.TXT	Update email address	2004-09-23 04:39:30 +00:00
LICENSE.TXT	Adjust the license files based on the actual content of llvm and llvm-test	2004-09-16 16:41:31 +00:00
llvm.spec	Updated for 1.3.	2004-08-16 15:17:40 +00:00
llvm.spec.in	Updated for 1.3.	2004-08-16 15:17:40 +00:00
Makefile	Changed the distclean target to handle the new location of config.h.	2004-09-17 15:08:25 +00:00
Makefile.am	Top level makefile for building LLVM with automake.	2004-10-10 19:13:03 +00:00
Makefile.common	Standardize header comments of top-level Makefiles.	2004-04-24 00:10:56 +00:00
Makefile.config.in	Fix typo in makefile variable name that prevents zlib from being recognized	2004-10-04 17:49:19 +00:00
Makefile.rules	Fix grammar	2004-10-11 02:06:40 +00:00
Makefile.rules.am	Reorganize FINDLIBS to make most comment libs searched first.	2004-10-10 22:54:46 +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)
================================

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Virtual Machine, a toolkit for the construction of highly optimized compilers,
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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
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