[Bug inline-asm/23200] New: [4.0 regress] rejects "i"(&var + 1)

[stsp at users dot sourceforge dot net]

Hi.

The following code, that used to compile on the older gcc,
now rejects:

---
static char var;
int main()
{
  asm volatile ("" :: "i"(&var + 1));
  return 0;
}
---

with the following message:
---
asc.c:5: warning: asm operand 0 probably doesnÂ’t match constraints
asc.c:5: error: impossible constraint in ‘asm’
---

Changing "+1" to "+0" makes it to compile again.

Here is the info on my gcc:

$ gcc -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-libgcj-multifile
--enable-languages=c,c++,objc,java,f95,ada --enable-java-awt=gtk
--with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --host=i386-redhat-linux
Thread model: posix
gcc version 4.0.1 20050714 (Red Hat 4.0.1-3)

-- 
           Summary: [4.0 regress] rejects "i"(&var + 1)
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: inline-asm
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: stsp at users dot sourceforge dot net
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: x86
  GCC host triplet: x86
GCC target triplet: x86


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23200