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Peter Zotov 8e620e76a8 Mark some FP intrinsics as safe to speculatively execute 
Floating point intrinsics in LLVM are generally not speculatively
executed, since most of them are defined to behave the same as libm
functions, which set errno.

However, the only error that can happen  when executing ceil, floor,
nearbyint, rint and round libm functions per POSIX.1-2001 is -ERANGE,
and that requires the maximum value of the exponent to be smaller
than  the number of mantissa bits, which is not the case with any of
the floating point types supported by LLVM.

The trunc and copysign functions never set errno per per POSIX.1-2001.

Differential Revision: http://reviews.llvm.org/D18643

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265262 91177308-0d34-0410-b5e6-96231b3b80d8
2016-04-03 12:30:46 +00:00
bindings [OCaml] Use LLVMCreateMessage with constant strings when calling llvm_raise 2016-04-01 07:56:17 +00:00
cmake [CMake] Provide the ability to skip stripping when generating dSYMs 2016-03-31 20:03:19 +00:00
docs Swift Calling Convention: add swifterror attribute. 2016-04-01 21:41:15 +00:00
examples [Kaleidoscope] Rename Error -> LogError in Chapters 2-5. 2016-03-25 17:41:26 +00:00
include Linker: Remove IRMover::isMetadataUnneeded indirection; almost NFC 2016-04-02 17:12:00 +00:00
lib Mark some FP intrinsics as safe to speculatively execute 2016-04-03 12:30:46 +00:00
projects Remove autoconf support 2016-01-26 21:29:08 +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 Mark some FP intrinsics as safe to speculatively execute 2016-04-03 12:30:46 +00:00
tools ValueMapper: Add support for seeding metadata with nullptr 2016-04-02 17:04:38 +00:00
unittests ValueMapper: Add support for seeding metadata with nullptr 2016-04-02 17:04:38 +00:00
utils lit: python3 compatibility fix 2016-03-31 23:08:55 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy adding readability-identifier-naming to llvm clang-tidy configuration. 2015-12-08 17:44:51 +00:00
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt dos2unix CMakeLists.txt 2016-03-28 18:19:32 +00:00
CODE_OWNERS.TXT Update owners to reflect recent changes 2016-04-01 20:40:49 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update copyright year to 2016. 2016-03-30 22:41:06 +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 Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
README.txt Revert previous test commit. 2016-01-04 19:13:29 +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.