Re: gcc crash

["H . J . Lu" <hjl@lucon.org>]

On Thu, Sep 27, 2001 at 04:59:47PM +0200, Kjeld Borch Egevang wrote:
> When I compile the following function with "gcc -O2" the compiler crashes.
> Is this a known problem?
> 
> static float sp_f2l(float x)
> {
>     long l, *xl;
>     float y;
> 
>     xl = (void *)&y;
>     l = x;
>     *xl = l;
>     return y;
> }
> 
> I use gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-97.2)
> 

I back ported this from gcc in CVS to gcc 2.96. It works for me. It
will be in the next RedHat 7.1/mips update.


H.J.
-----
2001-09-29  H.J. Lu <hjl@gnu.org>

        * gcc/emit-rtl.c (subreg_hard_regno): Comment out dubious code.

--- gcc/emit-rtl.c.subreg       Sat Sep 29 01:21:24 2001
+++ gcc/emit-rtl.c      Sat Sep 29 01:22:06 2001
@@ -734,6 +734,7 @@ subreg_hard_regno (x, check_mode)
 
   final_regno = SUBREG_REGNO (x);
 
+#if 0
   /* Punt if what we end up with is not a valid regno in
      the SUBREG's mode, or we went past the end of the inner
      REG's mode, or we overflow past the last hard regno.  */
@@ -743,6 +744,7 @@ subreg_hard_regno (x, check_mode)
           HARD_REGNO_NREGS (base_regno, GET_MODE (reg)))
        || final_regno >= FIRST_PSEUDO_REGISTER)
     abort ();
+#endif
 
   return final_regno;
 }