llvm-project/clang
Craig Topper e091523c82 [X86] Rewrite the max and min reduction intrinsics to make better use of other functions and to reduce width to 256 and 128 bits were possible.
Summary:
We only need to use 512 bit vectors all the way through v8i64 reductions since those max instructions are new to avx512f and only available in 512 bits until SKX.

For v16i32 and floating point we have legacy 128/256 bit instructions we can use.

I've tried to use other intrinsics to reduce the verbosity of the code and avoid having to mention all the shuffles. I've also removed all the -1 shuffle indices so the output sequence is fully specified and not left to backend optimization.

Reviewers: RKSimon, spatel, GBuella

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D47401

llvm-svn: 333347
2018-05-26 18:55:24 +00:00
..
INPUTS
bindings implementing Cursor.get_included_file in python bindings 2018-05-10 21:39:29 +00:00
cmake Set CMAKE_BUILD_WITH_INSTALL_RPATH for Fuchsia runtimes 2018-05-09 00:58:12 +00:00
docs [Clang Tablegen][RFC] Allow Early Textual Substitutions in `Diagnostic` messages. 2018-05-19 03:12:04 +00:00
examples Convert clang-interpreter to ORC JIT API 2018-05-25 20:23:42 +00:00
include [analyzer] Add security checks for bcmp(), bcopy(), bzero(). 2018-05-26 00:04:26 +00:00
lib [X86] Rewrite the max and min reduction intrinsics to make better use of other functions and to reduce width to 256 and 128 bits were possible. 2018-05-26 18:55:24 +00:00
runtime [clang] Use add_llvm_install_targets 2017-11-30 22:35:02 +00:00
test [X86] Rewrite the max and min reduction intrinsics to make better use of other functions and to reduce width to 256 and 128 bits were possible. 2018-05-26 18:55:24 +00:00
tools Reland r332885, "CodeGen, Driver: Start using direct split dwarf emission in clang." 2018-05-22 18:52:37 +00:00
unittests [ASTImporter] Fix ClassTemplateSpecialization in wrong DC 2018-05-25 11:21:24 +00:00
utils [ClangDiagnostics] Silence warning about fallthrough after PrintFatalError 2018-05-26 09:24:00 +00:00
www [analyzer] Add security checks for bcmp(), bcopy(), bzero(). 2018-05-26 00:04:26 +00:00
.arcconfig [clang] Set up .arcconfig to point to new Diffusion C repository 2017-11-27 17:21:24 +00:00
.clang-format
.clang-tidy Backport changes from llvm/.clang_tidy to clang/.clang_tidy configs 2018-03-20 14:39:12 +00:00
.gitignore
CMakeLists.txt CMake option to allow enabling experimental new pass manager by default 2018-04-06 00:53:00 +00:00
CODE_OWNERS.TXT Change code owner for Clang Static Analyzer to Devin Coughlin. 2017-11-17 23:19:04 +00:00
INSTALL.txt
LICENSE.TXT
ModuleInfo.txt
NOTES.txt
README.txt Test commit 2017-10-21 16:03:17 +00:00

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/