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Mirror of https://github.com/RPCS3/llvm-mirror
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b6376cdd2e
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Geoff Berry b6376cdd2e [DAGCombiner] Improve zextload optimization. 
Summary:
Don't fold
  (zext (and (load x), cst)) -> (and (zextload x), (zext cst))
if
  (and (load x) cst)
will match as a zextload already and has additional users.

For example, the following IR:

  %load = load i32, i32* %ptr, align 8
  %load16 = and i32 %load, 65535
  %load64 = zext i32 %load16 to i64
  store i32 %load16, i32* %dst1, align 4
  store i64 %load64, i64* %dst2, align 8

used to produce the following aarch64 code:

	ldr		w8, [x0]
	and	w9, w8, #0xffff
	and	x8, x8, #0xffff
	str		w9, [x1]
	str		x8, [x2]

but with this change produces the following aarch64 code:

	ldrh		w8, [x0]
	str		w8, [x1]
	str		x8, [x2]

Reviewers: resistor, mcrosier

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D14340

llvm-svn: 252789
2015-11-11 19:42:52 +00:00
autoconf Don't use bashism/kshism of test ==. From Kamil Rytarowski. 2015-09-12 16:30:32 +00:00
bindings Fix llvm-config to adapt to the install environment. 2015-11-09 23:15:38 +00:00
cmake [CMake] Make llvm_install_library_symlink respect LLVM_LIBDIR_SUFFIX. 2015-11-11 16:19:39 +00:00
docs Reverting r252760 2015-11-11 18:11:06 +00:00
examples examples: Remove implicit ilist iterator conversions, NFC 2015-11-07 00:55:46 +00:00
include dwarfdump: DWP type unit index dumping skeleton 2015-11-11 19:40:49 +00:00
lib [DAGCombiner] Improve zextload optimization. 2015-11-11 19:42:52 +00:00
projects [CMake] Disable adding the test suite as a projects subdirectory 2015-10-28 18:36:56 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test [DAGCombiner] Improve zextload optimization. 2015-11-11 19:42:52 +00:00
tools Format my previous commit 2015-11-11 19:30:47 +00:00
unittests ADT: Avoid relying on UB in ilist_node::getNextNode() 2015-11-11 02:26:42 +00:00
utils lit: Show all output with --show-all, even in combination with --succinct 2015-11-11 03:03:54 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt [CMake] Add support for building the llvm test-suite as part of an LLVM build using clang and lld 2015-11-11 16:14:03 +00:00
CODE_OWNERS.TXT Add myself as the the code owner for the AVR backend 2015-10-28 00:24:54 +00:00
configure Deprecate Autoconf 2015-11-09 21:54:55 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
Makefile.rules Create Makefile variables for 'share' and 'libexec' 2015-11-09 16:10:00 +00:00
README.txt Test commit after password reset 2015-11-11 19:24:08 +00:00

README.txt 

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

This directory and its subdirectories contain source code for LLVM,
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 documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.