[LLVMbugs] [Bug 22904] New: constructor elided with "-fno-elide-constructors" option

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=22904

            Bug ID: 22904
           Summary: constructor elided with "-fno-elide-constructors"
                    option
           Product: clang
           Version: 3.4
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: gabi.francu at yahoo.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Compile with "-fno-elide-constructors" option

#include <iostream>

struct A
{
    A() { std::cout << "default constructor" << std::endl; }
    A(const A&) { std::cout << "copy constructor" << std:: endl; }
};

A getAnA()
{
    A a;
    return a;
}

int main()
{
   getAnA();
}


The copy constructor is still elided.

Corect behaviour is obtained if the getAnA() is changed to:

A getAnA()
{
   return A();
}

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