target/8340: [mainline regression] ICE on x86 inline asm w/ -fPIC

[Glen Nakamura]

The following reply was made to PR target/8340; it has been noted by GNATS.

From: Glen Nakamura <glen@imodulo.com>
To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org
Cc:  
Subject: Re: target/8340: [mainline regression] ICE on x86 inline asm w/ -fPIC
Date: Thu, 24 Oct 2002 07:40:38 -1000

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8340
 
 On second thought, maybe this really is invalid code when compiled w/ -fPIC?
 gcc-3.2.1 silently generates the following incorrect code:
 
 00000000 <foo>:
    0:	55                   	push   %ebp
    1:	89 e5                	mov    %esp,%ebp
    3:	53                   	push   %ebx
    4:	e8 00 00 00 00       	call   9 <foo+0x9>
    9:	5b                   	pop    %ebx
    a:	81 c3 03 00 00 00    	add    $0x3,%ebx
   10:	31 db                	xor    %ebx,%ebx
   12:	89 9b 00 00 00 00    	mov    %ebx,0x0(%ebx)
   18:	8b 83 00 00 00 00    	mov    0x0(%ebx),%eax
   1e:	5b                   	pop    %ebx
   1f:	5d                   	pop    %ebp
   20:	c3                   	ret    
 
 A better error message would be nice, especially for gcc-3.2.1,
 but this isn't a high priority since the code seems invalid to me.
 
 - glen