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<?xml version="1.0" encoding="latin1" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>2006</year><year>2010</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
The contents of this file are subject to the Erlang Public License,
Version 1.1, (the "License"); you may not use this file except in
compliance with the License. You should have received a copy of the
Erlang Public License along with this software. If not, it can be
retrieved online at http://www.erlang.org/.
Software distributed under the License is distributed on an "AS IS"
basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
the License for the specific language governing rights and limitations
under the License.
</legalnotice>
<title>HiPE Release Notes</title>
<prepared>otp_appnotes</prepared>
<docno>nil</docno>
<date>nil</date>
<rev>nil</rev>
<file>notes.xml</file>
</header>
<p>This document describes the changes made to HiPE.</p>
<section><title>Hipe 3.7.6</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p><c>receive</c> statements that can only read out a
newly created reference are now specially optimized so
that it will execute in constant time regardless of the
number of messages in the receive queue for the process.
That optimization will benefit calls to
<c>gen_server:call()</c>. (See <c>gen:do_call/4</c> for
an example of a receive statement that will be
optimized.)</p>
<p>
Own Id: OTP-8623</p>
</item>
<item>
<p>
Various changes to dialyzer-related files for R14.</p>
<p>
- Dialyzer properly supports the new attribute
-export_type and checks that remote types only refer to
exported types. A warning is produced if some
files/applications refer to types defined in modules
which are neither in the PLT nor in the analyzed
applications.</p>
<p>
- Support for detecting data races involving whereis/1
and unregister/1.</p>
<p>
- More precise identification of the reason(s) why a
record construction violates the types declared for its
fields.</p>
<p>
- Fixed bug in the handling of the 'or' guard.</p>
<p>
- Better handling of the erlang:element/2 BIF.</p>
<p>
- Complete handling of Erlang BIFs.</p>
<p>
Own Id: OTP-8699</p>
</item>
<item>
<p><c>eprof</c> has been reimplemented with support in
the Erlang virtual machine and is now both faster (i.e.
slows down the code being measured less) and scales much
better. In measurements we saw speed-ups compared to the
old eprof ranging from 6 times (for sequential code that
only uses one scheduler/core) up to 84 times (for
parallel code that uses 8 cores).</p>
<p>Note: The API for the <c>eprof</c> has been cleaned up
and extended. See the documentation.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-8706</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.7.5</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>The documentation is now possible to build in an open
source environment after a number of bugs are fixed and
some features are added in the documentation build
process. </p>
<p>- The arity calculation is updated.</p>
<p>- The module prefix used in the function names for
bif's are removed in the generated links so the links
will look like
"http://www.erlang.org/doc/man/erlang.html#append_element-2"
instead of
"http://www.erlang.org/doc/man/erlang.html#erlang:append_element-2".</p>
<p>- Enhanced the menu positioning in the html
documentation when a new page is loaded.</p>
<p>- A number of corrections in the generation of man
pages (thanks to Sergei Golovan)</p>
<p>- The legal notice is taken from the xml book file so
OTP's build process can be used for non OTP
applications.</p>
<p>
Own Id: OTP-8343</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.7.4</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The documentation is now built with open source tools
(xsltproc and fop) that exists on most platforms. One
visible change is that the frames are removed.</p>
<p>
Own Id: OTP-8201</p>
</item>
<item>
<p>
Misc updates.</p>
<p>
Own Id: OTP-8301</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.7.3</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Various small bugs (one involving the handling of large
binaries) were corrected and some additions to its
functionality and/or code cleanups were done.</p>
<p>
Own Id: OTP-8189</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.7.2</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Miscellanous updates.</p>
<p>
Own Id: OTP-8038</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.7.1</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Minor updates and bug fixes.</p>
<p>
Own Id: OTP-7958</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.7</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Miscellaneous updates.</p>
<p>
Own Id: OTP-7877</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.6.9</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>The <c>--disable-hipe</c> option for the
<c>configure</c> will now completely disable the hipe
run-time in the emulator, as is the expected
behaviour.</p>
<p>
Own Id: OTP-7631</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.6.8</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Minor updates.</p>
<p>
Own Id: OTP-7522</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.6.7</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Minor changes.</p>
<p>
Own Id: OTP-7388</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.6.6</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>A fix for an #include problem which caused the FP
exception test to fail unnecessarily on
debian/glibc-2.7/x86 systems.</p>
<p>Added SIGFPE loop detection to the FP exception test.
This prevents the test from looping indefinitely, which
could happen when the CPU is supported (so we can enable
FP exceptions on it) but the OS isn't (so we can't write
a proper SIGFPE handler). x86 on an unsupported OS is
known to have had this problem.</p>
<p>
Own Id: OTP-7254</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
HiPE now also supports little-endian ARM processors.</p>
<p>
Own Id: OTP-7255</p>
</item>
</list>
</section>
</section>
<section><title>Hipe 3.6.5</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
HIPE: Corrected the choice of interface to the send/3 and
setnode/3 BIFs for native-compiled code. Using the
incorrect interface could, in unusual circumstances, lead
to random runtime errors.</p>
<p>
Own Id: OTP-7067</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The HiPE compiler's SPARC backend has been rewritten,
improving its correctness and long-term maintainability.</p>
<p>
Own Id: OTP-7133</p>
</item>
</list>
</section>
</section>
<section>
<title>Hipe 3.6.3</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Minor Makefile changes.</p>
<p>Own Id: OTP-6689</p>
</item>
<item>
<p>Miscellanous updates.</p>
<p>Own Id: OTP-6738</p>
</item>
</list>
</section>
</section>
<section>
<title>Hipe 3.6.2</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Miscellanous improvements.</p>
<p>Own Id: OTP-6577</p>
</item>
</list>
</section>
</section>
<section>
<title>Hipe 3.6.1.1</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>Dialyzer could fail to analyze certain beam files that
used try/catch.</p>
<p>Own Id: OTP-6449 Aux Id: seq10563 </p>
</item>
</list>
</section>
</section>
<section>
<title>Hipe 3.6.1</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>HiPE runtime system:</p>
<p>* added notes about supported systems to README</p>
<p>* support 32-bit x86 on FreeBSD</p>
<p>* autoenable HiPE on FreeBSD (32-bit x86) and Solaris
(64-bit x86)</p>
<p>* updated x86 runtime system to support glibc-2.5</p>
<p>* work around probable gcc-4.1.1 bug affecting the x86
runtime system</p>
<p>HiPE compiler:</p>
<p>* improved performance of integer multiplications on
all platforms</p>
<p>* corrected a code optimisation error in R11B-2 that
broke some bsl/bsr operations on all platforms</p>
<p>* corrected a type error in the ARM backend which
could cause the compiler to crash</p>
<p>* corrected an error in the SPARC backend's naive
register allocator which could throw the compiler into an
infinite loop</p>
<p>Own Id: OTP-6423</p>
</item>
</list>
</section>
</section>
<section>
<title>Hipe 3.6.0</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Support for native code on Solaris 10/AMD64.</p>
<p>Support for native code on FreeBSD/AMD64.</p>
<p>Native code now handles external funs (<c><![CDATA[fun M:F/A]]></c>). Native code can now also apply so-called
tuple-funs (<c><![CDATA[{M,F}]]></c>). (Tuple funs are NOT
recommended for new code; they are deprecated and will be
removed in some future release.)</p>
<p>Own Id: OTP-6305</p>
</item>
</list>
</section>
</section>
<section>
<title>Hipe 3.5.6</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Improved compilation of receives for the SMP runtime
system.</p>
<p>Improved code quality in HiPE compiler on ARM.</p>
<p>Fix bug in handling of re-raised exceptions in
try-catch.</p>
<p>(HiPE loader) When native code is incompatible with
the current runtime system, fall back to loading the BEAM
code.</p>
<p>Own Id: OTP-6127</p>
</item>
</list>
</section>
</section>
</chapter>
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