AM30/AM33 SP handling

[Alexandre Oliva <aoliva at cygnus dot com>]

This could make GCC a tad bit faster, and might improve some
optimizations.  No significant effects on code size (that was not the
point):

^ gcc/am33/libgcc.a 26923 26947
v gcc/libgcc.a 27179 27018
v mn10300-elf/am33/libio/libiostream.a 63979 63977
v mn10300-elf/am33/libstdc++/libstdc++.a 69913 69839
^ mn10300-elf/libiberty/libiberty.a 27904 27926
^ mn10300-elf/libio/libio.a 23667 23710
v mn10300-elf/libio/libiostream.a 63691 63640
v mn10300-elf/libstdc++/libstdc++.a 69605 69442
v mn10300-elf/newlib/libc.a 46930 46896
v mn10300-elf/newlib/libc/libc.a 45525 45488
v mn10300-elf/newlib/libc/misc/lib.a 762 755
v mn10300-elf/newlib/libc/stdio/lib.a 17080 17047
^ mn10300-elf/newlib/libc/stdlib/lib.a 19858 19865
v mn10300-elf/newlib/libc/string/lib.a 2876 2871
v mn10300-elf/newlib/libc/time/lib.a 2722 2720
v mn10300-elf/newlib/libg.a 46930 46896
^ mn10300-elf/newlib/libm.a 95856 95892
^ mn10300-elf/newlib/libm/common/lib.a 8216 8259
^ mn10300-elf/newlib/libm/libm.a 95856 95892
v mn10300-elf/newlib/libm/math/lib.a 87640 87633

Ok to install?

Index: gcc/ChangeLog
from  Alexandre Oliva  <aoliva@cygnus.com>

	* config/mn10300/mn10300.h (REG_CLASS_FROM_LETTER): Return
	EXTENDED_REGS only if TARGET_AM33.
	* config/mn10300/mn10300.md (movsi): Move SP handling to
	separate patterns.

Index: gcc/config/mn10300/mn10300.h
===================================================================
RCS file: /cvs/gcc/egcs/gcc/config/mn10300/mn10300.h,v
retrieving revision 1.25
diff -u -r1.25 mn10300.h
--- gcc/config/mn10300/mn10300.h	2000/03/29 13:10:44	1.25
+++ gcc/config/mn10300/mn10300.h	2000/04/21 18:32:14
@@ -287,8 +287,10 @@
 #define REG_CLASS_FROM_LETTER(C) \
   ((C) == 'd' ? DATA_REGS : \
    (C) == 'a' ? ADDRESS_REGS : \
+   (C) == 'y' ? SP_REGS : \
+   ! TARGET_AM33 ? NO_REGS : \
    (C) == 'x' ? EXTENDED_REGS : \
-   (C) == 'y' ? SP_REGS : NO_REGS)
+   NO_REGS)
 
 /* Macros to check register numbers against specific register classes.  */
 
Index: gcc/config/mn10300/mn10300.md
===================================================================
RCS file: /cvs/gcc/egcs/gcc/config/mn10300/mn10300.md,v
retrieving revision 1.27
diff -u -r1.27 mn10300.md
--- gcc/config/mn10300/mn10300.md	2000/01/14 23:03:45	1.27
+++ gcc/config/mn10300/mn10300.md	2000/04/21 19:19:50
@@ -295,10 +295,26 @@
 }")
 
 (define_insn ""
+  [(set (match_operand:SI 0 "general_operand" "=y,*d*xaR")
+	(match_operand:SI 1 "general_operand" "dxaR,y"))]
+  "TARGET_AM33 && (operands[0] == stack_pointer_rtx
+		   || operands[1] == stack_pointer_rtx)"
+  "mov %1, %0"
+  [(set_attr "cc" "none_0hit,none_0hit")])
+
+(define_insn ""
+  [(set (match_operand:SI 0 "general_operand" "=y,aR")
+	(match_operand:SI 1 "general_operand" "aR,y"))]
+  "operands[0] == stack_pointer_rtx
+   || operands[1] == stack_pointer_rtx"
+  "mov %1, %0"
+  [(set_attr "cc" "none_0hit,none_0hit")])
+
+(define_insn ""
   [(set (match_operand:SI 0 "general_operand"
-				"=dx,ax,dx,a,dxm,dxm,axm,axm,dx,dx,ax,ax,axR,y")
+				"=dx,ax,dx,a,dxm,dxm,axm,axm,dx,dx,ax,ax")
 	(match_operand:SI 1 "general_operand"
-				"0,0,I,I,dx,ax,dx,ax,dixm,aixm,dixm,aixm,xy,axR"))]
+				"0,0,I,I,dx,ax,dx,ax,dixm,aixm,dixm,aixm"))]
   "register_operand (operands[0], SImode)
    || register_operand (operands[1], SImode)"
   "*
@@ -319,8 +335,6 @@
     case 9:
     case 10:
     case 11:
-    case 12:
-    case 13:
       if (GET_CODE (operands[1]) == CONST_DOUBLE)
 	{
 	  rtx xoperands[2];
@@ -344,7 +358,7 @@
       abort();
     }
 }"
-  [(set_attr "cc" "none,none,clobber,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit")])
+  [(set_attr "cc" "none,none,clobber,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit,none_0hit")])
 
 (define_expand "movsf"
   [(set (match_operand:SF 0 "general_operand" "")

-- 
Alexandre Oliva    Enjoy Guaranį, see http://www.ic.unicamp.br/~oliva/
Cygnus Solutions, a Red Hat company        aoliva@{redhat, cygnus}.com
Free Software Developer and Evangelist    CS PhD student at IC-Unicamp
oliva@{lsd.ic.unicamp.br, gnu.org}   Write to mailing lists, not to me