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9f7e91c37f
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Ahmed Bougacha 9f7e91c37f [AArch64] Use intermediate step for concat_vectors of illegal truncs. 
Optimize concat_vectors of truncated vectors, where the intermediate
type is illegal, to avoid said illegality,  e.g.,
  (v4i16 (concat_vectors (v2i16 (truncate (v2i64))),
                         (v2i16 (truncate (v2i64)))))
->
  (v4i16 (truncate (v4i32 (concat_vectors (v2i32 (truncate (v2i64))),
                                          (v2i32 (truncate (v2i64)))))))

This isn't really target-specific, and, as such, would best go in the
DAGCombiner.  However, ISD::TRUNCATE legality isn't keyed on both input
and result type, so we might generate worse code when we don't know
better.  On AArch64 we know it's fine for v2i64->v4i16 and v4i32->v8i8.
rdar://20022387

llvm-svn: 232459
2015-03-17 03:23:09 +00:00
autoconf [autoconf] Fix the build failure by quoting the strings. 2015-03-12 19:56:25 +00:00
bindings Go bindings: use MDNode::replaceAllUsesWith instead of MDTuple::replaceAllUsesWith. 2015-03-05 22:55:38 +00:00
cmake Refactoring CMake CrossCompile module. 2015-03-12 17:33:34 +00:00
docs Adding commit msg guidelines to dev policy 2015-03-15 21:15:48 +00:00
examples Fix the build of the gold-plugin and examples. 2015-03-04 19:15:29 +00:00
include Fix ODR violations caused by putting anonymous namespaces in header files (and 2015-03-17 02:36:51 +00:00
lib [AArch64] Use intermediate step for concat_vectors of illegal truncs. 2015-03-17 03:23:09 +00:00
projects Reverse the order libc++ and libc++abi are added in CMake. 2015-03-04 01:16:43 +00:00
test [AArch64] Use intermediate step for concat_vectors of illegal truncs. 2015-03-17 03:23:09 +00:00
tools Pass in a "const Triple &T" instead of a raw StringRef. 2015-03-16 22:29:29 +00:00
unittests MapMetadata: Allow unresolved metadata if it won't change 2015-03-17 01:14:40 +00:00
utils Use the variable names from the TargetInstrInfo source when we 2015-03-13 01:26:39 +00:00
.arcconfig
.clang-format
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Add one more vim swap file pattern 2015-01-30 21:59:28 +00:00
CMakeLists.txt Add new LLVM_OPTIMIZED_TABLEGEN build setting which configures, builds and uses a release tablegen build when LLVM is configured with assertions enabled. 2015-03-10 20:48:02 +00:00
CODE_OWNERS.TXT Tom is also responsible for the 3.6 branch. 2015-03-16 18:15:27 +00:00
configure [autoconf] Fix the build failure by quoting the strings. 2015-03-12 19:56:25 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add support for SunOS function/data sections and associated 2015-03-03 20:54:29 +00:00
README.txt Revert test commit 2015-02-04 18:46:00 +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're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.