Re: optimization/6162: gcc 3.0.4: certain i386 asm reloader ice

[Kevin Ryde <user42@zip.com.au>]

The following reply was made to PR optimization/6162; it has been noted by GNATS.

From: Kevin Ryde <user42@zip.com.au>
To: gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: optimization/6162: gcc 3.0.4: certain i386 asm reloader ice
Date: Sat, 03 Aug 2002 08:57:10 +1000

 --=-=-=
 
 I struck another reloader ice, which to my untrained eye looks the
 same as the one in this bug I submitted before, but with the advantage
 of happening on a much smaller and simpler input.
 
 
 --=-=-=
 Content-Type: text/x-csrc
 Content-Disposition: attachment; filename=bar.c
 
 void
 foo (unsigned *wp, unsigned *xp, unsigned *yp, long size)
 {
   unsigned w3, w2, w1, w0, hi, z;
 
   __asm__ ("mull %3"
            : "=a" (w2), "=d" (w3)
            : "%0" (xp[1]), "rm" (yp[1]));
 
   __asm__ ("mull %3"
            : "=a" (w1), "=d" (hi)
            : "%0" (xp[0]), "rm" (yp[1]));
 
   __asm__ ("addl %5,%1\n"
            "adcl %3,%0"
            : "=r"  (z),
              "=&r" (w0)
            : "%0"  (w2),
              "g"   (hi),
              "%1"  (w1),
              "g"   (0));
 
   w3 += (z < w2);
   wp[2] = z;
   wp[3] = w3;
 }
 
 --=-=-=
 Content-Disposition: attachment; filename=bar.out
 
 gcc-3.1 -O -c bar.c
 bar.c: In function `foo':
 bar.c:26: unrecognizable insn:
 (insn 25 23 27 (parallel[ 
             (set (reg/v:SI 1 edx [67])
                 (asm_operands:SI ("addl %5,%1
 adcl %3,%0") ("=r") 0[ 
                         (reg/v:SI 2 ecx [63])
                         (reg/v:SI 1 edx [66])
                         (reg/v:SI 0 eax [64])
                         (const_int 0 [0x0])
                     ] 
                     [ 
                         (asm_input:SI ("%0"))
                         (asm_input:SI ("g"))
                         (asm_input:SI ("%1"))
                         (asm_input:SI ("g"))
                     ]  ("bar.c") 14))
             (set (reg/v:SI 0 eax [65])
                 (asm_operands:SI ("addl %5,%1
 adcl %3,%0") ("=&r") 1[ 
                         (reg/v:SI 2 ecx [63])
                         (reg/v:SI 1 edx [66])
                         (reg/v:SI 0 eax [64])
                         (const_int 0 [0x0])
                     ] 
                     [ 
                         (asm_input:SI ("%0"))
                         (asm_input:SI ("g"))
                         (asm_input:SI ("%1"))
                         (asm_input:SI ("g"))
                     ]  ("bar.c") 14))
             (clobber (reg:QI 19 dirflag))
             (clobber (reg:QI 18 fpsr))
             (clobber (reg:QI 17 flags))
         ] ) -1 (insn_list 19 (insn_list 23 (insn_list 23 (nil))))
     (nil))
 bar.c:26: Internal compiler error in reload_cse_simplify_operands, at reload1.c:8369
 Please submit a full bug report,
 with preprocessed source if appropriate.
 See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
 m: *** [bar.o] Error 1
 
 --=-=-=--