[Bug debug/14860] New: [regression] gcc -gstabs+ fails to emit stabs for fundamental types

[mec dot gnu at mindspring dot com]

Here is a test program:

  char * pc;

  int main ()
  {
    return 0;
  }

Compile with gcc -gstabs+ -S.

Here are the stabs with gcc 2004-03-23 23:40:00 UTC

        .stabs  "char:t(0,2)=r(0,2);0;127;",128,0,0,0
        .stabs  "pc:G(0,16)=*(0,2)",32,0,1,0

Here are the stabs with gcc 2004-03-24 00:00:00 UTC

        .stabs  "pc:G(0,2)=*(0,3)=r(0,3);0;127;",32,0,1,0

The problem with the new stabs is that type (0,3) has no name.
So gdb cannot print this type:

  # gdb 6.0
  (gdb) ptype pc
  type = <invalid type code 7> *

I narrowed the regression down to this patch:

  2004-03-23  Zack Weinberg  <zack@codesourcery.com>

        PR 12267, 12391, 12560, 13129, 14114, 14133

This problem does not happen with -gdwarf-2.

This problem happens with gcc HEAD and gcc tree-ssa-20020619-branch.  It does
not happen with gcc gcc-3_4-branch or gcc gcc-3_3-branch.

I suspect that the problem is related to the removal of first_builtin_decl and
last_builtin_decl.  When I compile an empty program with the old compiler, there
are stab lines for about 20 builtin types (int, char, float, double, etc).  When
I compile an empty program with the new compiler, there are no such stab lines.

-- 
           Summary: [regression] gcc -gstabs+ fails to emit stabs for
                    fundamental types
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P1
         Component: debug
        AssignedTo: zack at codesourcery dot com
        ReportedBy: mec dot gnu at mindspring dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14860