Re: [wwwdocs] changes.html - PGO and GCOV changes

[Gerald Pfeifer]

On Wed, 25 Jan 2017, Martin Liška wrote:
> Following patch adds what was said in the changes file to our 
> documentation.

+constructors with priority support, the profiling properly handles 
constructors,
+destructors and C++ constructors (and destructors) of classes which are used

Just "profiling" (without "the" before).  

And the lines appear a little long?

Okay to commit otherwise.

Thanks,
Gerald

Re: [wwwdocs] changes.html - PGO and GCOV changes

[Martin Liška]

Hello.

Following patch adds what was said in the changes file to our documentation.

Thanks,
Martin
>From 0da7f4d9a2a895e63271e9dc870814c6c7e3f419 Mon Sep 17 00:00:00 2001
From: marxin 
Date: Wed, 25 Jan 2017 16:41:23 +0100
Subject: [PATCH] Enhance doc for -fprofile-arcs

gcc/ChangeLog:

2017-01-25  Martin Liska  

	* doc/invoke.texi (-fprofile-arcs): Document profiling support
	for {cd}tors and C++ {cd}tors.
---
 gcc/doc/invoke.texi | 7 ++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 6a42193d106..223a0aed7af 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -10584,7 +10584,12 @@ linking.
 @opindex fprofile-arcs
 Add code so that program flow @dfn{arcs} are instrumented.  During
 execution the program records how many times each branch and call is
-executed and how many times it is taken or returns.  When the compiled
+executed and how many times it is taken or returns.  On targets that support
+constructors with priority support, the profiling properly handles constructors,
+destructors and C++ constructors (and destructors) of classes which are used
+as a type of a global variable.
+
+When the compiled
 program exits it saves this data to a file called
 @file{@var{auxname}.gcda} for each source file.  The data may be used for
 profile-directed optimizations (@option{-fbranch-probabilities}), or for
-- 
2.11.0

[wwwdocs] changes.html - PGO and GCOV changes

[Martin Liška]

Hello.

Following patch documents changes in PGO and GCOV which were done for upcoming 
GCC 7.1.

Thanks for feedback,
Martin
--- /tmp/wwwdocs/htdocs/gcc-7/changes.html	2017-01-25 11:10:56.0 +0100
+++ htdocs/gcc-7/changes.html	2017-01-25 14:48:56.257587082 +0100
@@ -630,6 +630,18 @@
 
   GCC has gained an internal unit-testing framework, allowing for
 more detailed testing of its implementation details.
+
+  Profile-guided optimization (PGO) instrumentation, as well as test coverage (GCOV),
+  can newly instrument constructors (functions marks with __attribute__((constructor))),
+  destructors and C++ constructors (and destructors) of classes that are used
+  as a type of a global variable.
+  
+  A new option -fprofile-update=atomic prevents creation of corrupted
+  profiles created during instrumentation run (-fprofile=generate)
+  of an application.  Downside of the option is a speed penalty.  Providing
+  -pthread on command line would result in selection of atomic
+  profile updating (when supports by a target).
+