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Ahmed Bougacha d1801afeac [CodeGen] Properly support the half FP type with non-native operations. 
On AArch64, the -fallow-half-args-and-returns option is the default.
With it, the half type is considered legal (rather than the i16 used
normally for __fp16), but no operation is, except conversions and
load/stores and such.

The previous behavior was tantamount to saying LangOpts.NativeHalfType
was implied by LangOpts.HalfArgsAndReturns, which isn't true.
Instead, teach the various parts of CodeGen that already know about
half (using the intrinsics or not) about this weird in-between case,
where the "half" type is legal, but operations on it aren't.

This is a smaller intermediate step to the end-goal of removing the
intrinsic, always using "half", and letting the backend legalize.

Builds on r232968.
rdar://20045970, rdar://17468714
Differential Revision: http://reviews.llvm.org/D8367

llvm-svn: 232971
 		2015-03-23 17:54:16 +00:00
..
INPUTS
…
bindings This reverts commit r227432, r227438 and r227448. 2015-01-29 17:22:53 +00:00
cmake/modules Make it easier to build against a pre-built Clang package with CMake 2014-11-05 23:14:59 +00:00
docs [UBSan] Don't allow to use UBSan with anything except for ASan. 2015-03-20 18:45:06 +00:00
examples Replace size() calls on containers with empty() calls where appropriate. NFC 2015-01-23 15:36:10 +00:00
include OpenMPClause.h: Fix typo in \param. [-Wdocumentation] 2015-03-23 16:05:50 +00:00
lib [CodeGen] Properly support the half FP type with non-native operations. 2015-03-23 17:54:16 +00:00
runtime Remove support for building sanitizers from Makefile/autoconf build on Linux. 2015-02-18 22:26:22 +00:00
test [CodeGen] Properly support the half FP type with non-native operations. 2015-03-23 17:54:16 +00:00
tools [OPENMP] Codegen for 'copyprivate' clause ('single' directive). 2015-03-23 06:18:07 +00:00
unittests Update unit test for r232916. 2015-03-22 16:05:46 +00:00
utils Devirtualize Attr and all subclasses. 2015-03-19 16:06:49 +00:00
www C++14: Disable sized deallocation by default due to ABI breakage 2015-03-20 00:31:07 +00:00
.arcconfig
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.clang-format
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.clang-tidy Enable display of compiler diagnostics in clang-tidy. 2014-10-29 17:28:51 +00:00
.gitignore
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CMakeLists.txt clang/CMakeLists.txt: Introduce LLVM_SHLIB_OUTPUT_INTDIR also here, or plugins tests might fail. 2015-01-05 14:06:14 +00:00
CODE_OWNERS.TXT Add myself as a code owner for Microsoft C++ ABI code and general Windows support 2015-02-26 20:37:49 +00:00
INSTALL.txt
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LICENSE.TXT Update copyright year to 2015. 2015-03-12 01:36:10 +00:00
Makefile
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ModuleInfo.txt
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NOTES.txt
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README.txt
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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.cs.uiuc.edu/mailman/listinfo/cfe-dev

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