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Silviu Baranga 22ab3adc5c [AArch64] Multiply extended 32-bit ints with `[U|S]MADDL' 
During instruction selection, the AArch64 backend can recognise the
following pattern and generate an [U|S]MADDL instruction, i.e. a
multiply of two 32-bit operands with a 64-bit result:

(mul (sext i32), (sext i32))
However, when one of the operands is constant, the sign extension
gets folded into the constant in SelectionDAG::getNode(). This means
that the instruction selection sees this:

(mul (sext i32), i64)
...which doesn't match the pattern. Sign-extension and 64-bit
multiply instructions are generated, which are slower than one 32-bit
multiply.

Add a pattern to match this and generate the correct instruction, for
both signed and unsigned multiplies.

Patch by Chris Diamand!

llvm-svn: 259800
2016-02-04 16:47:09 +00:00
bindings Remove autoconf support 2016-01-26 21:29:08 +00:00
cmake cmake: Add a flag to enable LTO 2016-02-04 07:28:30 +00:00
docs cmake: Add a flag to enable LTO 2016-02-04 07:28:30 +00:00
examples Remove autoconf support 2016-01-26 21:29:08 +00:00
include [Power PC] softening long double type 2016-02-04 14:43:50 +00:00
lib [AArch64] Multiply extended 32-bit ints with `[U|S]MADDL' 2016-02-04 16:47:09 +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 [AArch64] Multiply extended 32-bit ints with `[U|S]MADDL' 2016-02-04 16:47:09 +00:00
tools Print the OffsetStart field's relocation 2016-02-03 22:45:21 +00:00
unittests [PGO] Profile interface cleanup 2016-02-04 05:29:51 +00:00
utils The canonical way to XFAIL a test for all targets is XFAIL: *, not XFAIL: 2016-02-04 16:21:38 +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 [GlobalISel] Add the proper cmake plumbing. 2016-01-20 20:58:56 +00:00
CODE_OWNERS.TXT [docs] Remove references to autotools build. 2016-01-30 01:10:15 +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 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
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.