[Bug c++/63263] friend declaration of function template specialization gets confused when specialization was forward declared.

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63263

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
With the trunk I get an ICE too:
t.cc: In instantiation of ‘void f(T&, float&) [with T = B]’:
t.cc:22:9:   required from here
t.cc:4:3: error: no matching function for call to ‘B::B(int)’
   T(1);
   ^
t.cc:14:8: note: candidate: B::B()
 struct B {
        ^
t.cc:14:8: note:   candidate expects 0 arguments, 1 provided
t.cc:14:8: note: candidate: B::B(const B&)
t.cc:14:8: note:   no known conversion for argument 1 from ‘int’ to ‘const B&’
t.cc:4:7: internal compiler error: in add_stmt, at cp/semantics.c:395
   T(1);
       ^
Please submit a full bug report,
with preprocessed source if appropriate.
>From gcc-bugs-return-461803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 14 22:05:36 2014
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From: "mikulas at artax dot karlin.mff.cuni.cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/63264] New: Internal error due to invalid assembler register specification
Date: Sun, 14 Sep 2014 22:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc264

            Bug ID: 63264
           Summary: Internal error due to invalid assembler register
                    specification
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mikulas at artax dot karlin.mff.cuni.cz
              Host: x86_64-linux-gnux32
            Target: x86_64-linux-gnux32
             Build: x86_64-linux-gnux32

This piece of code:
void f(unsigned x)
{
        __asm__ volatile ("xorl %R0, %R0":"=r"(x):"r"(x):"cc");
}
triggers this internal error:
asm-crash.c: In function 'f':
asm-crash.c:4:1: internal compiler error: in ix86_print_operand, at
config/i386/i386.c:15214
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The error happens in i386, x86-64 and x32 mode. With or without optimization.