[Bug c++/65291] protected using constructor default arguments not recognized

["webmatematika at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>]

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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65291

--- Comment #1 from webmatematika at hotmail dot com ---
Here is compile error output:  

(I added in c.cpp line 4 "public:" in class C)





voja@vojaws:~/coding$ gcc c.cpp -std=c++11
c.cpp: In constructor ‘C::C()’:
c.cpp:5:11: error: no matching function for call to ‘B::B()’
   C() : B() {}
           ^
c.cpp:5:11: note: candidates are:
In file included from c.cpp:1:0:
b.h:7:12: note: B::B(int)
   using A::A;
            ^
b.h:7:12: note:   candidate expects 1 argument, 0 provided
b.h:5:3: note: B::B(int, int)
   B(int b1, int b2) : A(b1) {}
   ^
b.h:5:3: note:   candidate expects 2 arguments, 0 provided
b.h:3:7: note: constexpr B::B(const B&)
 class B : public A {
       ^
b.h:3:7: note:   candidate expects 1 argument, 0 provided
b.h:3:7: note: constexpr B::B(B&&)
b.h:3:7: note:   candidate expects 1 argument, 0 provided
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From: "raj.khem at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65292] New: Template function not emitted
Date: Tue, 03 Mar 2015 05:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide292

            Bug ID: 65292
           Summary: Template function not emitted
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: raj.khem at gmail dot com

Created attachment 34932
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id4932&actioníit
testcase

Attached code from webkit, shows that when compiling it for arm with gcc -O2, a
function goes missing in the object file

   case NonArrayWithInt32: case ArrayWithInt32: {
        putByIndexBeyondVectorLengthWithoutAttributes<Int32Shape>(exec, i,
value);
        break;
    }

    case NonArrayWithDouble: case ArrayWithDouble: {
        putByIndexBeyondVectorLengthWithoutAttributes<DoubleShape>(exec, i,
value);
        break;
    }

    case NonArrayWithContiguous: case ArrayWithContiguous: {
        putByIndexBeyondVectorLengthWithoutAttributes<ContiguousShape>(exec, i,
value);
        break;
    }

Out of those calls, putByIndexBeyondVectorLengthWithoutAttributes<Int32Shape>
is not emitted into .s file, when compiled with -O1 the function is emitted


This problem is not happening on 4.8.x or 4.9.x

gcc-5.0 - O2
=============
readelf -sW JSObject.o | c++filt | grep
putByIndexBeyondVectorLengthWithoutAttributes
   298: 00000000   284 FUNC    WEAK   HIDDEN    43 void
JSC::JSObject::putByIndexBeyondVectorLengthWithoutAttributes<(unsigned
char)22>(JSC::ExecState*, unsigned int, JSC::JSValue)
   300: 00000000   264 FUNC    WEAK   HIDDEN    45 void
JSC::JSObject::putByIndexBeyondVectorLengthWithoutAttributes<(unsigned
char)26>(JSC::ExecState*, unsigned int, JSC::JSValue)

gcc-5.0 - O1
===========
readelf -sW a.o | c++filt | grep putByIndexBeyondVectorLengthWithoutAttributes
   505: 00000000   224 FUNC    WEAK   DEFAULT  128 void
JSC::JSObject::putByIndexBeyondVectorLengthWithoutAttributes<(unsigned
char)20>(JSC::ExecState*, unsigned int, JSC::JSValue)
   507: 00000000   252 FUNC    WEAK   DEFAULT  138 void
JSC::JSObject::putByIndexBeyondVectorLengthWithoutAttributes<(unsigned
char)22>(JSC::ExecState*, unsigned int, JSC::JSValue)
   510: 00000000   224 FUNC    WEAK   DEFAULT  147 void
JSC::JSObject::putByIndexBeyondVectorLengthWithoutAttributes<(unsigned
char)26>(JSC::ExecState*, unsigned int, JSC::JSValue)


version I am at is gcc version 5.0.0 20150301 (experimental) (GCC)