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bc03b6c341
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Chris Lattner bc03b6c341 Completely rewrite addressing-mode related sinking of code. In particular, 
this fixes problems where codegenprepare would sink expressions into load/stores
that are not valid, and fixes cases where it would miss important valid ones.

This fixes several serious codesize and perf issues, particularly on targets
with complex addressing modes like arm and x86.  For example, now we compile
CodeGen/X86/isel-sink.ll to:

_test:
        movl 8(%esp), %eax
        movl 4(%esp), %ecx
        cmpl $1233, %eax
        ja LBB1_2       #F
LBB1_1: #T
        movl $4, (%ecx,%eax,4)
        movl $141, %eax
        ret
LBB1_2: #F
        movl (%ecx,%eax,4), %eax
        ret

instead of:

_test:
        movl 8(%esp), %eax
        leal (,%eax,4), %ecx
        addl 4(%esp), %ecx
        cmpl $1233, %eax
        ja LBB1_2       #F
LBB1_1: #T
        movl $4, (%ecx)
        movl $141, %eax
        ret
LBB1_2: #F
        movl (%ecx), %eax
        ret

llvm-svn: 35970
2007-04-13 20:30:56 +00:00
autoconf Hack the shared library extension for dylib. The existing code just looks 2007-04-11 00:33:43 +00:00
docs update documentation 2007-04-12 20:34:36 +00:00
examples Revert last patch. The examples build now. 2007-03-06 17:26:14 +00:00
include Implement a getBitsNeeded method to determine how many bits are needed to 2007-04-13 19:19:07 +00:00
lib Completely rewrite addressing-mode related sinking of code. In particular, 2007-04-13 20:30:56 +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 New testcase 2007-04-13 20:28:08 +00:00
tools Make the generated code for ConstantInt nicer. 2007-04-11 13:02:56 +00:00
utils Adding target triplet to be passed to database. 2007-04-13 04:36:48 +00:00
win32 Track new header file. 2007-04-08 21:19:52 +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 Hopefully fix LTDL_SHLIB_EXT on Darwin 2007-04-11 00:27:39 +00:00
CREDITS.TXT Add Roman to credits 2007-03-21 21:45:25 +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 don't build runtime for now, ever 2007-03-29 18:14:00 +00:00
Makefile.common
Makefile.config.in For PR789: 2007-03-29 19:05:44 +00:00
Makefile.rules Speed up installation a bit by ignoring .svn directories. 2007-04-09 19:08:58 +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.