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Chris Lattner 4f26677dc9 Don't bother sign/zext_inreg'ing the result of an and operation if we know 
the result does change as a result of the extend.

This improves codegen for Alpha on this testcase:

int %a(ushort* %i) {
        %tmp.1 = load ushort* %i
        %tmp.2 = cast ushort %tmp.1 to int
        %tmp.4 = and int %tmp.2, 1
        ret int %tmp.4
}

Generating:

a:
        ldgp $29, 0($27)
        ldwu $0,0($16)
        and $0,1,$0
        ret $31,($26),1

instead of:

a:
        ldgp $29, 0($27)
        ldwu $0,0($16)
        and $0,1,$0
        addl $0,0,$0
        ret $31,($26),1

btw, alpha really should switch to livein/outs for args :)

llvm-svn: 21213
2005-04-10 23:37:16 +00:00
autoconf Recognize an IA64 when we see one 2005-03-17 20:56:22 +00:00
docs * Put command-line switches and function names in <tt> 2005-03-30 19:14:24 +00:00
examples add missing copyright header 2005-03-15 15:46:23 +00:00
include/llvm * store immediate values as int64_t, not int. come on, we should be happy 2005-04-10 09:18:55 +00:00
lib Don't bother sign/zext_inreg'ing the result of an and operation if we know 2005-04-10 23:37:16 +00:00
projects Rename createPromoteMemoryToRegister() to 2005-03-28 02:01:12 +00:00
runtime Fix grammar 2005-03-23 21:14:33 +00:00
test fix this testcase so the regex doesn't match the function name 2005-04-10 20:45:35 +00:00
tools The first argument to ExecuteAndWait should be the program name, but pointed 2005-04-10 20:59:38 +00:00
utils spiff up the nightly tester output one more notch 2005-03-17 16:07:45 +00:00
win32 Do #include HashExtras.h with VC++ 2005-03-16 05:49:58 +00:00
.cvsignore Ignore the autom4te.cache directoy. 2004-12-24 15:11:23 +00:00
configure Recognize an IA64 when we see one 2005-03-17 20:56:22 +00:00
CREDITS.TXT Updating my entry. 2005-03-22 21:33:19 +00:00
LICENSE.TXT Another year, another copyright update. 2005-01-08 19:10:44 +00:00
llvm.spec
Makefile Remove the check target. Its now in Makefile.rules 2004-12-06 05:35:00 +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 PR528: 2005-02-24 03:56:32 +00:00
Makefile.rules * Remove extraneous spaces 2005-03-11 04:15:18 +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.