[Bug c++/50056] New: Binding a temporary object to a reference

[wolfgang.roe...@gi-de.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50056

             Bug #: 50056
           Summary: Binding a temporary object to a reference
    Classification: Unclassified
           Product: gcc
           Version: 4.5.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: wolfgang.roe...@gi-de.com


Hi all,

I would like to post a bug report for the GNU C/C++ compiler
version 4.5.2 (powerpc-rtems4.11).

We use the compiler to generate code for a PowerPC processor.

The compiler is invoked with the following options:

ccppc -c -x c++ -ansi -Wall -Werror -g -mcpu=8540 -fverbose-asm -mbig
      -mfloat-gprs=double -mspe -mabi=spe -meabi -msdata -fno-common
      -mmultiple -mno-string -misel -mstrict-align -fgcse-sm
      -fno-rename-registers -fno-section-anchors -G 8 -Os
      -fno-exceptions -fno-rtti
      -I<some include paths>
      -D<some #define's>
      X.CPP -oX.O

// file X.CPP

struct S
{
    S();
    ~S();
    void func () const;
};

void test (void)
{
    const S& s = static_cast<const S&>(S());

    s.func ();
}


The code compiles fine but function test() is translated to the following
pseudo code:
  call S::S()
  call S::~S()    --> now we have a dangling reference s without an object
  call S::func()  --> calling an element function without an object


Kind regards
W. Roehrl