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Evan Cheng 70071434ae Initial support for copy elimination by commuting its definition MI.
PR1877.
A3 = op A2 B0<kill>                                                                                                                                                                            
...                                                                                                                                                                                     
B1 = A3      <- this copy                                                                                                                                                                      
...                                                                                                                                                                                          
   = op A3   <- more uses                                                                                                                                                                      
                                                                                                                                                                                                 
==>                                                                                                                                                                                             
                                                                                                                                                                                            
B2 = op B0 A2<kill>                                                                                                                                                                            
...                                                                                                                                                                                          
B1 = B2      <- now an identify copy                                                                                                                                                           
...                                                                                                                                                                                          
   = op B2   <- more uses

This speeds up FreeBench/neural by 29%, Olden/bh by 12%, oopack_v1p8 by 53%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47046 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 03:01:43 +00:00
autoconf Make the check for GCC version more robust, fix shared library 2008-02-05 19:43:40 +00:00
bindings
docs Note that these instructions are for x86-32 linux 2008-02-12 21:40:21 +00:00
examples
include Initial support for copy elimination by commuting its definition MI. 2008-02-13 03:01:43 +00:00
lib Initial support for copy elimination by commuting its definition MI. 2008-02-13 03:01:43 +00:00
projects
runtime Fixing the stack walker. 2008-01-24 05:16:36 +00:00
test Re-apply the patch to improve the optimizations of memcpy's, with several 2008-02-12 21:15:18 +00:00
tools Begin setting features for target based on target triple string. 2008-02-07 22:32:50 +00:00
utils Remove dead code. 2008-02-12 18:20:50 +00:00
website
win32 Rename MRegisterInfo to TargetRegisterInfo. 2008-02-10 18:45:23 +00:00
Xcode Rename MRegisterInfo to TargetRegisterInfo. 2008-02-10 18:45:23 +00:00
build-for-llvm-top.sh
configure regenerate 2008-02-05 19:43:53 +00:00
CREDITS.TXT
LICENSE.TXT scoped_ptr.h was removed. 2008-02-09 22:50:06 +00:00
llvm.spec.in
Makefile
Makefile.common
Makefile.config.in improve compatibility with mingw, patch by Alain Frisch 2008-01-15 22:50:50 +00:00
Makefile.rules Make the check for GCC version more robust, fix shared library 2008-02-05 19:43:40 +00:00
ModuleInfo.txt
README.txt

Low Level Virtual Machine (LLVM)
================================

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