[Bug c/23618] New: GCC seems to generate line number information for the same line in two places

[Bug c/23618] New: GCC seems to generate line number information for the same line in two places

[tommi dot hoynalanmaa at iki dot fi]

When compiling a function with an empty body, e.g.
  int MyFunc(void)
    {
    }
GCC seems to add line number information for the line containing the opening
bracket in two different places. 

Here is an example assembler output:
----
.globl MyFunc
        .type   MyFunc, @function
MyFunc:
.LFB3:
        .loc 1 5 0
        pushl   %ebp
.LCFI0:
        movl    %esp, %ebp
.LCFI1:
        .loc 1 5 0
        popl    %ebp
        ret
.LFE3:
----
Line number information for line 5 (the opening bracket) is seems to be added in
two places.

-- 
           Summary: GCC seems to generate line number information for the
                    same line in two places
           Product: gcc
           Version: 3.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tommi dot hoynalanmaa at iki dot fi
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23618

[Bug c/23618] GCC seems to generate line number information for the same line in two places

[tommi dot hoynalanmaa at iki dot fi]

------- Additional Comments From tommi dot hoynalanmaa at iki dot fi  2005-08-29 08:59 -------
Created an attachment (id=9612)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9612&action=view)
Preprocessed source to generate the bug


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23618

[Bug c/23618] GCC seems to generate line number information for the same line in two places

[tommi dot hoynalanmaa at iki dot fi]

------- Additional Comments From tommi dot hoynalanmaa at iki dot fi  2005-08-29 09:01 -------
Here is the output of "gcc -v" on my system:
---
Reading specs from /usr/lib/gcc-lib/i486-linux/3.3.4/specs
Configured with: ../src/configure -v
--enable-languages=c,c++,java,f77,pascal,objc,ada,treelang --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-clocale=gnu --enable-debug --enable-java-gc=boehm
--enable-java-awt=xlib --enable-objc-gc i486-linux
Thread model: posix
gcc version 3.3.4 (Debian 1:3.3.4-9ubuntu5)
---



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23618

[Bug debug/23618] GCC seems to generate line number information for the same line in two places

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-29 12:40 -------
Fixed for 4.0.0:
MyFunc:
.LFB2:
        .file 1 "debugtest1.c"
        .loc 1 5 0
        pushl   %ebp
.LCFI0:
        movl    %esp, %ebp
.LCFI1:
        .loc 1 6 0
        popl    %ebp
        ret

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
          Component|c                           |debug
         Resolution|                            |FIXED
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23618