Re: [wwwdocs] gcc-4.8/changes.html: mention IRA and transactional memory
On Mon, 20 May 2013, Aldy Hernandez wrote: > I am committing the attached patch. Thanks, Aldy. I just noticed the casing of SPARC and a bit of an inconsistency around IA-32, and committed the follow-up below (which also contains one "back end" fix). Gerald Index: changes.html === RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v retrieving revision 1.123 diff -u -3 -p -r1.123 changes.html --- changes.html16 Oct 2013 13:47:15 - 1.123 +++ changes.html26 Nov 2013 03:09:31 - @@ -145,11 +145,11 @@ by this change. GNU/Linux. A new local register allocator (LRA) has been implemented, which replaces the 26 year old reload pass and improves generated -code quality. For now it is active on the ia32 and x86-64 +code quality. For now it is active on the IA-32 and x86-64 targets. Support for transactional memory has been implemented on the following architectures: IA-32/x86-64, ARM, PowerPC, SH, -Sparc, and Alpha. +SPARC, and Alpha. @@ -639,7 +639,7 @@ int i = A().f(); // error, f() requires http://gcc.gnu.org/wiki/FunctionMultiVersioning";>wiki for more information. - The x86 backend has been improved to allow option + The x86 back end has been improved to allow option -fschedule-insns to work reliably. This option can be used to schedule instructions better and leads to improved performace in certain cases.
Re: [wwwdocs] gcc-4.8/changes.html: mention IRA and transactional memory
Okay after considering those questions. And thanks for catching and addressing this! Thank you. I am committing the attached patch. Index: gcc-4.8/changes.html === RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v retrieving revision 1.116 diff -u -r1.116 changes.html --- gcc-4.8/changes.html24 Apr 2013 15:14:26 - 1.116 +++ gcc-4.8/changes.html20 May 2013 16:36:37 - @@ -143,6 +143,13 @@ -fsanitize=thread. Instructions will be instrumented to detect data races. The ThreadSanitizer is available on x86-64 GNU/Linux. +A new local register allocator has been implemented, which +replaces the 26 year old reload pass and improves generated +code quality. For now it is active on the ia32 and x86-64 +targets. +Support for transactional memory has been implemented on the +following architectures: IA-32/x86-64, ARM, PowerPC, SH, +Sparc, and Alpha.
Re: [wwwdocs] gcc-4.8/changes.html: mention IRA and transactional memory
On Fri, 17 May 2013, Aldy Hernandez wrote: Errr, how did we miss this? Ok, I'm partly to blame for the lack of transactional memory in changes.html, but something as big as getting rid of reload?! I guess I need to start being more of a nuisance again when it comes to release notes / announcements. :-/ Would it be preferable to mention IRA in the target specific x86 section instead? I figured it was an important enough change to warrant front-page coverage. Agreed. Two suggestions: Index: htdocs/gcc-4.8/changes.html === RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v retrieving revision 1.116 diff -u -r1.116 changes.html --- htdocs/gcc-4.8/changes.html 24 Apr 2013 15:14:26 - 1.116 +++ htdocs/gcc-4.8/changes.html 17 May 2013 17:49:19 - @@ -143,6 +143,11 @@ -fsanitize=thread. Instructions will be instrumented to detect data races. The ThreadSanitizer is available on x86-64 GNU/Linux. +A new local register allocator has been implemented, which +replaces the 26 year old reload pass and improves generated code +quality on ia32 and x86-64 targets. How about making this "...quality. For now it is active on..."? The idea is to make it explicit that this is a general change, which just is enabled on these two architectures for now. +Support for transactional memory has been implemented on +selected architectures. Do you have a list? Okay after considering those questions. And thanks for catching and addressing this! Gerald
[wwwdocs] gcc-4.8/changes.html: mention IRA and transactional memory
Errr, how did we miss this? Ok, I'm partly to blame for the lack of transactional memory in changes.html, but something as big as getting rid of reload?! Would it be preferable to mention IRA in the target specific x86 section instead? I figured it was an important enough change to warrant front-page coverage. Is this OK? Index: htdocs/gcc-4.8/changes.html === RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v retrieving revision 1.116 diff -u -r1.116 changes.html --- htdocs/gcc-4.8/changes.html 24 Apr 2013 15:14:26 - 1.116 +++ htdocs/gcc-4.8/changes.html 17 May 2013 17:49:19 - @@ -143,6 +143,11 @@ -fsanitize=thread. Instructions will be instrumented to detect data races. The ThreadSanitizer is available on x86-64 GNU/Linux. +A new local register allocator has been implemented, which +replaces the 26 year old reload pass and improves generated code +quality on ia32 and x86-64 targets. +Support for transactional memory has been implemented on +selected architectures.
