[Bug c++/18143] New: Duplicated thunk with a huge member in the hierarchy

[grigory dot zagorodnev at intel dot com]

For the code listed below, GCC 4.0 (20041010) emits duplicated virtual 
destructor thunk, so assembler fails to compile.

The size of c3::m member does matter there - test fails with magic value 
0x3fffd or above and passes with any value below.

$ cat go.cpp 
struct c0 {
    virtual void foo(){};
};
 
struct c1 {
    virtual ~c1(){};
};
 
struct c2 : virtual c1 { };
 
struct c3 {
  char m[0x3fffd];
};
 
struct c4 : c0, c3, c2 {
    c4();
};
c4::c4() { };
 
class c5 : virtual c4 {};
class c6 : c4 {};


$ g++ go.cpp
/tmp/cchxBAaw.s: Assembler messages:
/tmp/cchxBAaw.s:631: Error: symbol `_ZTh262140_N2c4D1Ev' is already defined
/tmp/cchxBAaw.s:650: Error: symbol `_ZTh262140_N2c4D1Ev' is already defined
/tmp/cchxBAaw.s:721: Error: symbol `_ZTh262140_N2c4D0Ev' is already defined
/tmp/cchxBAaw.s:740: Error: symbol `_ZTh262140_N2c4D0Ev' is already defined

-- 
           Summary: Duplicated thunk with a huge member in the hierarchy
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: grigory dot zagorodnev at intel dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-redhat-linux
  GCC host triplet: i686-redhat-linux
GCC target triplet: i686-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18143