[Boost-bugs] [Boost C++ Libraries] #11661: BOOST_NO_UNREACHABLE_RETURN_DETECTION to use __builtin_unreachable()

Subject: [Boost-bugs] [Boost C++ Libraries] #11661: BOOST_NO_UNREACHABLE_RETURN_DETECTION to use __builtin_unreachable()
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-09-16 15:08:03

#11661: BOOST_NO_UNREACHABLE_RETURN_DETECTION to use __builtin_unreachable()
------------------------------+--------------------------
 Reporter:  akrzemi1          |      Owner:  johnmaddock
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  config
  Version:  Boost 1.59.0      |   Severity:  Optimization
 Keywords:                    |
------------------------------+--------------------------
 Macro BOOST_NO_UNREACHABLE_RETURN_DETECTION is now defined as:

 {{{
 #ifdef BOOST_NO_UNREACHABLE_RETURN_DETECTION
 #  define BOOST_UNREACHABLE_RETURN(x) return x;
 #else
 #  define BOOST_UNREACHABLE_RETURN(x)
 #endif
 }}}

 In order to take the full advantage of the compiler widgets, I think it
 could be changed to:

 {{{
 #ifdef BOOST_NO_UNREACHABLE_RETURN_DETECTION
 #  define BOOST_UNREACHABLE_RETURN(x) return x;
 #else if __HAS_BUILTIN_UNREACHABLE
 #  define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable()
 #else
 #  define BOOST_UNREACHABLE_RETURN(x)
 #endif
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11661>
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