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a46c278634
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Andrew Kaylor a46c278634 [X86] Add MXCSR register 
This adds MXCSR to the set of recognized registers for X86 targets and updates the instructions that read or write it. I do not intend for all of the various floating point instructions that implicitly use the control bits or update the status bits of this register to ever have that usage modeled by default. However, when constrained floating point modes (such as strict FP exception status modeling or dynamic rounding modes) are enabled, implicit use/def information for MXCSR will be added to those instructions.

Until those additional updates are made this should cause (almost?) no functional changes. Theoretically, this will prevent instructions like LDMXCSR and STMXCSR from being moved past one another, but that should be prevented anyway and I haven't found a case where it is happening now.

Differential Revision: https://reviews.llvm.org/D29903



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295004 91177308-0d34-0410-b5e6-96231b3b80d8
2017-02-13 23:38:52 +00:00
bindings Fix go bindings after r289702 (hopefully, don't really know how to build 2016-12-15 06:54:29 +00:00
cmake config-ix.cmake: Search for CMAKE_XCRUN before using it. 2017-02-11 00:14:01 +00:00
docs [LangRef] Explicitly allow readnone and reaodnly functions to unwind 2017-02-13 23:19:07 +00:00
examples Kaleidoscope-Ch7: Add TranformUtils for llvm::createPromoteMemoryToRegisterPass() added in r294870. 2017-02-12 01:18:32 +00:00
include [CodeGen] Use bitfields instead of manual masks in ArgFlagsTy, NFC 2017-02-13 21:33:26 +00:00
lib [X86] Add MXCSR register 2017-02-13 23:38:52 +00:00
projects [CMake] Correct configuration order of the sub-projects based on ther dependancies 2016-10-09 20:38:29 +00:00
resources
runtimes [CMake] Handle common options for runtimes build 2017-01-10 19:47:05 +00:00
test [X86] Add MXCSR register 2017-02-13 23:38:52 +00:00
tools [llvm-lto2] Fix typo spotted by Teresa (r294885 post-commit review). 2017-02-13 16:08:36 +00:00
unittests [XRay][graph] Disambiguate name of type from member name 2017-02-10 06:59:25 +00:00
utils vim: add returned keyword 2017-02-10 23:57:11 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore [AVR] Add the integrated testing tool to the .gitignore 2016-12-14 11:47:14 +00:00
CMakeLists.txt [CMake] Allow overriding CMAKE_LIBTOOL 2017-02-07 23:32:56 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Update email address 2017-02-09 21:29:12 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Revert r294228 2017-02-06 19:40:56 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit: remove a blank line. 2017-02-03 10:56:57 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +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.