[Boost-bugs] [Boost C++ Libraries] #13160: cpp_dec_float fails division with on MinGW7.1 with optimization -O2

Subject: [Boost-bugs] [Boost C++ Libraries] #13160: cpp_dec_float fails division with on MinGW7.1 with optimization -O2
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-08-13 07:34:17

#13160: cpp_dec_float fails division with on MinGW7.1 with optimization -O2
------------------------------+----------------------------
 Reporter:  dwieselwind@…     |      Owner:  John Maddock
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  multiprecision
  Version:  Boost 1.63.0      |   Severity:  Optimization
 Keywords:                    |
------------------------------+----------------------------
 When compiling the following on MinGW 7.1 with option -O2, the assertion
 fires.

 It succeeds (as expected) with:
 -O3
 debug (no optimization)
 -m64 (in all configurations)

 {{{
 #include <cassert>
 #include <boost/multiprecision/cpp_dec_float.hpp>

 typedef
 boost::multiprecision::number<boost::multiprecision::cpp_dec_float<50> >
 flp_type;

 int main()
 {
     flp_type v1("1.33");
         flp_type v2(50);
         v1 /= v2;
         assert(v1 == flp_type("0.0266"));

     return 0;
 }

 }}}

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13160>
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