[Bug c++/34715] New: always_inline does not seem to force inlining when used only in the definition of a function in a namespace

[lo at meep dot co dot uk]

Snapshot gcc-4.3-20080104, gcc-4.3-20071109.

Test code below.  When 'inline' modifier and 'always_inline' attribute are used
only in the definition of "min", inlining does not appear to happen (and no
error is output).  When I add the modifier and attribute to the declaration of
"min", inlining does happen as expected.

Also: If I change X to a class, and min to a static function, inlining occurs
even if I mark only the declaration with 'inline' and 'always_inline'.

Note: I am assuming inlining hasn't happened due to the presence of the
following line in the assembly generated with the -S option:
 call    _ZN1X3minIiEERKT_S3_S3_
Apologies if that's not correct, or if I have misunderstood what's supposed to
happen with use of always_inline.  

======================
PREPROCESSED SOURCE #1
======================

# 1 "y.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "y.cpp"
# 1 "try.h" 1


namespace X
{
 template <class T>
 const T& min(const T& a, const T& b);
}


template <class T>
inline __attribute__ ((always_inline)) const T& X::min(const T& a, const T& b)
{
 return a < b ? a : b;
}
# 2 "y.cpp" 2
int main()
{
 int a, b;
 return X::min(a, b);
}

======================
PREPROCESSED SOURCE #2
======================

# 1 "y.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "y.cpp"
# 1 "try.h" 1


namespace X
{
 template <class T>
 inline __attribute__ ((always_inline)) const T& min(const T& a, const T& b);
}


template <class T>
inline __attribute__ ((always_inline)) const T& X::min(const T& a, const T& b)
{
 return a < b ? a : b;
}
# 2 "y.cpp" 2
int main()
{
 int a, b;
 return X::min(a, b);
}


-- 
           Summary: always_inline does not seem to force inlining when used
                    only in the definition of a function in a namespace
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: lo at meep dot co dot uk


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34715