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c892aeb266
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Evan Cheng c892aeb266 Optimize a couple of common patterns involving conditional moves where the false 
value is zero. Instead of a cmov + op, issue an conditional op instead. e.g.
    cmp   r9, r4
    mov   r4, #0
    moveq r4, #1 
    orr   lr, lr, r4

should be:
    cmp   r9, r4
    orreq lr, lr, #1

That is, optimize (or x, (cmov 0, y, cond)) to (or.cond x, y). Similarly extend
this to xor as well as (and x, (cmov -1, y, cond)) => (and.cond x, y).

It's possible to extend this to ADD and SUB but I don't think they are common.

rdar://8659097


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151224 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-23 01:19:06 +00:00
autoconf autoconf/m4/visibility_inlines_hidden.m4: Tweak for cygwin-g++-4.5.3. It folded conftest regardress of attributge((noinline)) with >=O1 . 2012-02-19 12:05:12 +00:00
bindings ocaml bindings: landing pad is now the last opcode. 2012-02-07 18:58:19 +00:00
cmake add LLVM_VERSION_MAJOR and _MINOR defines 2012-02-13 18:48:10 +00:00
docs libclc is now dual licensed, Tobias and Peter own their respective subprojects. 2012-02-22 19:17:20 +00:00
examples Switch to a more idiomatic way of silencing unused variable warnings in 2012-02-20 00:02:49 +00:00
include Track reserved registers separately from RegsAvailable. 2012-02-23 01:13:32 +00:00
lib Optimize a couple of common patterns involving conditional moves where the false 2012-02-23 01:19:06 +00:00
projects Replace the old --with-cxx-* configure options with a single --with-gcc-toolchain 2012-02-03 00:59:30 +00:00
runtime Fixing a warning in MSVC (this is also a test commit) 2012-02-05 19:43:39 +00:00
test Optimize a couple of common patterns involving conditional moves where the false 2012-02-23 01:19:06 +00:00
tools Improve handling of blockaddresses in bugpoint when splitting a module. Patch by Daniel Reynaud. 2012-02-22 01:43:47 +00:00
unittests Fix typos. 2012-02-22 16:01:54 +00:00
utils Remove bad comma from .el file. 2012-02-22 19:38:03 +00:00
.gitignore git: Add tools/lldb to the ignore list. 2011-11-10 22:55:50 +00:00
CMakeLists.txt add LLVM_VERSION_MAJOR and _MINOR defines 2012-02-13 18:48:10 +00:00
configure autoconf/m4/visibility_inlines_hidden.m4: Tweak for cygwin-g++-4.5.3. It folded conftest regardress of attributge((noinline)) with >=O1 . 2012-02-19 12:05:12 +00:00
CREDITS.TXT Update credits. 2012-02-16 18:54:41 +00:00
LICENSE.TXT Happy new year 2012! 2012-01-01 08:16:56 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Makefile: add missing files to FilesToConfig 2012-01-17 02:56:49 +00:00
Makefile.common
Makefile.config.in capitalize project name, reference bugzilla 2011-12-18 18:50:16 +00:00
Makefile.rules On Cygwin/MingW, add SharedLibDir and LLVMToolDir to the library search path, since shared libraries are placed in 'bin'. (static libraries are still in 'lib'). 2012-02-18 10:03:19 +00:00
README.txt test commit 2012-02-07 08:18:05 +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.

If you're writing a package for LLVM, see docs/Packaging.html for our
suggestions.