Bug#423407: gcc-snapshot: invalid warning in -O2

[Pierre Habouzit <madcoder@debian.org>]

Package: gcc-snapshot
Version: 20070422-1
Severity: important

sample code:

=====================================
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>

static int bar(void *p)
{
    return (int)(intptr_t)p;
}

static int foo(const void *p)
{
    return bar((void *)p);
}

int main(void)
{
    printf("%d\n", foo(NULL));
    return 0;
}
=====================================

works:
  /usr/lib/gcc-snapshot/bin/gcc -o a.o a.c

does not work:
  /usr/lib/gcc-snapshot/bin/gcc -O2 -o a.o a.c
  a.c: In function 'main':
  a.c:12: warning: passing argument 1 of 'bar' discards qualifiers from pointer target type


  FWIW under other circumstances I even got an ICE, but I wasn't able to
reduce the testcase, and the code that generated it is not really ..
well open, so I can't give the full file sadly.



-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.20-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages gcc-snapshot depends on:
ii  binutils              2.17.20070210cvs-1 The GNU assembler, linker and bina
ii  libasound2            1.0.13-2           ALSA library
ii  libatk1.0-0           1.18.0-2           The ATK accessibility toolkit
ii  libc6                 2.5-7              GNU C Library: Shared libraries
ii  libc6-dev             2.5-7              GNU C Library: Development Librari
ii  libcairo2             1.4.6-1            The Cairo 2D vector graphics libra
ii  libfontconfig1        2.4.2-1.2          generic font configuration library
ii  libfreetype6          2.2.1-5            FreeType 2 font engine, shared lib
ii  libgcc1               1:4.1.2-6          GCC support library
ii  libgcj-bc             4.1.2-2            Link time only library for use wit
ii  libglib2.0-0          2.12.12-1          The GLib library of C routines
ii  libgmp3c2             2:4.2.1+dfsg-4     Multiprecision arithmetic library
ii  libgtk2.0-0           2.10.12-1          The GTK+ graphical user interface 
ii  libice6               1:1.0.3-2          X11 Inter-Client Exchange library
ii  libmpfr1              2.2.1.dfsg.1-2     multiple precision floating-point 
ii  libpango1.0-0         1.16.4-1           Layout and rendering of internatio
ii  libsm6                1:1.0.2-2          X11 Session Management library
ii  libstdc++6            4.1.2-6            The GNU Standard C++ Library v3
ii  libx11-6              2:1.1.1-1          X11 client-side library
ii  libxcursor1           1:1.1.8-2          X cursor management library
ii  libxext6              1:1.0.3-2          X11 miscellaneous extension librar
ii  libxfixes3            1:4.0.3-2          X11 miscellaneous 'fixes' extensio
ii  libxi6                1:1.0.1-4          X11 Input extension library
ii  libxinerama1          1:1.0.2-1          X11 Xinerama extension library
ii  libxrandr2            2:1.2.1-1          X11 RandR extension library
ii  libxrender1           1:0.9.2-1          X Rendering Extension client libra
ii  libxtst6              1:1.0.1-5          X11 Testing -- Resource extension 
ii  zlib1g                1:1.2.3-13         compression library - runtime

gcc-snapshot recommends no packages.

-- no debconf information