gcc-2.7 creates faster code than pgcc-1.1.1

[H.J. Lu]

Hi,

It seems that "movzb? %al,%?ax" may be faster than "and? $255,%?ax".
This patch for egcs 1.1.2 seems to make gzip faster.

Thanks.


-- 
H.J. Lu (hjl@gnu.org)
---
Thu Mar  4 14:04:49 1999  H.J. Lu  (hjl@gnu.org)

	* config/i386/i386.md (zero_extendqihi2): Use "and" when target
	and source are both "ax" only if TARGET_ZERO_EXTEND_WITH_AND is
	true.
	(zero_extendqisi2): Likewise.

--- ../../../import/egcs-1.1.x/egcs/gcc/config/i386/i386.md	Sun Feb 14 08:30:40 1999
+++ config/i386/i386.md	Thu Mar  4 13:46:07 1999
@@ -1738,7 +1741,7 @@
   {
   rtx xops[2];
 
-  if ((TARGET_ZERO_EXTEND_WITH_AND || REGNO (operands[0]) == 0)
+  if ((TARGET_ZERO_EXTEND_WITH_AND || (0 & REGNO (operands[0]) == 0))
       && REG_P (operands[1]) 
       && REGNO (operands[0]) == REGNO (operands[1]))
     {
@@ -1819,7 +1822,7 @@
   {
   rtx xops[2];
 
-  if ((TARGET_ZERO_EXTEND_WITH_AND || REGNO (operands[0]) == 0)
+  if ((TARGET_ZERO_EXTEND_WITH_AND || (0 & REGNO (operands[0]) == 0))
       && REG_P (operands[1]) 
       && REGNO (operands[0]) == REGNO (operands[1]))
     {