maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm
History
Chris Lattner 0a85420409 Extend CanEvaluateZExtd to handle and/or/xor more aggressively in the 
BitsToClear case.  This allows it to promote expressions which have an
and/or/xor after the lshr, promoting cases like test2 (from PR4216) 
and test3 (random extample extracted from a spec benchmark).

clang now compiles the code in PR4216 into:

_test_bitfield:                                             ## @test_bitfield
	movl	%edi, %eax
	orl	$194, %eax
	movl	$4294902010, %ecx
	andq	%rax, %rcx
	orl	$32768, %edi
	andq	$39936, %rdi
	movq	%rdi, %rax
	orq	%rcx, %rax
	ret

instead of:

_test_bitfield:                                             ## @test_bitfield
	movl	%edi, %eax
	orl	$194, %eax
	movl	$4294902010, %ecx
	andq	%rax, %rcx
	shrl	$8, %edi
	orl	$128, %edi
	shlq	$8, %rdi
	andq	$39936, %rdi
	movq	%rdi, %rax
	orq	%rcx, %rax
	ret

which is still not great, but is progress.

llvm-svn: 93145
 		2010-01-11 04:05:13 +00:00
..
Xcode
…
autoconf Proper deduce z/System LLVM target from target triple when 2010-01-05 20:45:13 +00:00
bindings Fix another parallel make race condition. 2009-12-18 20:12:14 +00:00
cmake Update CMake LibDeps 2010-01-04 23:17:24 +00:00
docs add 3 passes which have been added but aren't used afaik. 2010-01-09 22:30:40 +00:00
examples fix PR5649 by making fib use the JIT instead of the interpreter, patch by Perry Lorier! 2009-12-01 01:56:27 +00:00
include Compute isFunctionLocal in MDNode ctor or via argument in new function getWhenValsUnresolved(). 2010-01-10 07:14:18 +00:00
lib Extend CanEvaluateZExtd to handle and/or/xor more aggressively in the 2010-01-11 04:05:13 +00:00
projects Move DataTypes.h to include/llvm/System, update all users. This breaks the last 2009-10-26 01:35:46 +00:00
runtime remove the random sampling framework, which is not maintained anymore. 2010-01-02 20:07:03 +00:00
test Extend CanEvaluateZExtd to handle and/or/xor more aggressively in the 2010-01-11 04:05:13 +00:00
tools Enable debug buffering. 2010-01-05 01:30:32 +00:00
unittests NamedMDNode is a collection MDNodes. 2010-01-05 20:41:31 +00:00
utils Tighten up the vim LLVM IR syntax highlighting regex for labels, and add a 2010-01-09 17:22:48 +00:00
website
…
CMakeLists.txt Fix CMake build for InstCombine changes 2010-01-04 21:58:55 +00:00
CREDITS.TXT Add myself to the blame list. 2009-08-20 15:20:15 +00:00
LICENSE.TXT 2010 is upon us. 2010-01-09 18:40:31 +00:00
Makefile Update install-clang target for clang-cc removal. 2009-12-12 21:17:54 +00:00
Makefile.common
…
Makefile.config.in Fix typos. Thanks to John Tytgat for noticing it! 2009-12-07 00:27:35 +00:00
Makefile.rules Add the rest of the build system logic for optional target disassemblers 2009-11-25 04:46:58 +00:00
ModuleInfo.txt
…
README.txt First test commit 2009-10-05 22:29:11 +00:00
build-for-llvm-top.sh
…
configure Regenerate 2010-01-05 20:45:43 +00:00
llvm.spec.in
…

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.