From c7181f1393788572fa451bfd8d45d62c8889dd50 Mon Sep 17 00:00:00 2001 From: Martin Liska Date: Fri, 27 Jan 2017 10:58:34 +0100 Subject: [PATCH] Enhance doc for -fprofile-arcs 2017-01-27 Martin Liska * doc/invoke.texi (-fprofile-arcs): Document profiling support for {cd}tors and C++ {cd}tors. From-SVN: r244964 --- gcc/ChangeLog | 5 +++++ gcc/doc/invoke.texi | 7 ++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e288fd5dae7..401037701ee 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2017-01-27 Martin Liska + + * doc/invoke.texi (-fprofile-arcs): Document profiling support + for {cd}tors and C++ {cd}tors. + 2017-01-27 Dominik Vogt * config/s390/s390.md ("*setmem_long_and") diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index d388d0178c5..c205023d59c 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, 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 -- 2.30.2