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14a74b66f7
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Sanjay Patel 14a74b66f7 add fast-math-flags to 'call' instructions (PR21290) 
This patch adds optional fast-math-flags (the same that apply to fmul/fadd/fsub/fdiv/frem/fcmp)
to call instructions in IR. Follow-up patches would use these flags in LibCallSimplifier, add 
support to clang, and extend FMF to the DAG for calls.

Motivating example:

%y = fmul fast float %x, %x
%z = tail call float @sqrtf(float %y)

We'd like to be able to optimize sqrt(x*x) into fabs(x). We do this today using a function-wide
attribute for unsafe-math, but we really want to trigger on the instructions themselves:

%z = tail call fast float @sqrtf(float %y)

because in an LTO build it's possible that calls with fast semantics have been inlined into a
function with non-fast semantics.

The code changes and tests are based on the recent commits that added "notail":
http://reviews.llvm.org/rL252368

and added FMF to fcmp:
http://reviews.llvm.org/rL241901

Differential Revision: http://reviews.llvm.org/D14707

llvm-svn: 255555
2015-12-14 21:59:03 +00:00
autoconf [OPENMP] Make -fopenmp to turn on OpenMP support by default. 2015-12-10 05:45:58 +00:00
bindings Fix llvm-config to adapt to the install environment. 2015-11-09 23:15:38 +00:00
cmake [CMake] Add LLVM_BUILD_INSTRUMENTED option to enable building with -fprofile-instr-generate 2015-12-10 21:19:07 +00:00
docs add fast-math-flags to 'call' instructions (PR21290) 2015-12-14 21:59:03 +00:00
examples [Orc] Fix Kaleidoscope example for change in r254693. 2015-12-04 02:32:32 +00:00
include add fast-math-flags to 'call' instructions (PR21290) 2015-12-14 21:59:03 +00:00
lib add fast-math-flags to 'call' instructions (PR21290) 2015-12-14 21:59:03 +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 add fast-math-flags to 'call' instructions (PR21290) 2015-12-14 21:59:03 +00:00
tools Start implementing FDE dumping when printing the eh_frame. 2015-12-14 21:49:49 +00:00
unittests add fast-math-flags to 'call' instructions (PR21290) 2015-12-14 21:59:03 +00:00
utils Reordering fields to reduce padding in LLVM. NFC 2015-12-14 21:57:05 +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 [CMake] Add option LLVM_EXTERNALIZE_DEBUGINFO 2015-12-03 18:45:39 +00:00
CODE_OWNERS.TXT Friendly takeover of the Hexagon backend 2015-12-03 17:07:12 +00:00
configure [OPENMP] Make -fopenmp to turn on OpenMP support by default. 2015-12-10 05:45:58 +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 Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
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 Revert previous test commit. 2015-12-11 07:40:25 +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.