invoke.texi (-mreg-alloc): Nuke.

	* invoke.texi (-mreg-alloc): Nuke.
	* i386.c (ix86_reg_alloc_order, regs_allocated,
	order_regs_for_local_alloc): Nuke.
	(override_options): Kill reg_alloc code.
	* i386.h (TARGET_OPTIONS): Kill reg-alloc.
	(REG_ALLOC_ORDER): SSE goes before I387.
	(ORDER_REGS_FOR_LOCAL_ALLOC): Kill.
	(ix86_reg_alloc_order): Likewise.
	* i386-protos.h (ix86_reg_alloc_order): Kill.

From-SVN: r39697

gcc/ChangeLog

+Wed Feb 14 12:37:37 CET 2001  Jan Hubicka  <jh@suse.cz>
+
+	* invoke.texi (-mreg-alloc): Nuke.
+	* i386.c (ix86_reg_alloc_order, regs_allocated,
+	order_regs_for_local_alloc): Nuke.
+	(override_options): Kill reg_alloc code.
+	* i386.h (TARGET_OPTIONS): Kill reg-alloc.
+	(REG_ALLOC_ORDER): SSE goes before I387.
+	(ORDER_REGS_FOR_LOCAL_ALLOC): Kill.
+	(ix86_reg_alloc_order): Likewise.
+	* i386-protos.h (ix86_reg_alloc_order): Kill.
+
 2001-02-14  Richard Henderson  <rth@redhat.com>
 
 	* toplev.c (f_options): Clarify -fschedule-insns2 documentation.

gcc/config/i386/i386-protos.h

@@ -21,7 +21,6 @@ Boston, MA 02111-1307, USA. */
 
 /* Functions in i386.c */
 extern void override_options PARAMS ((void));
-extern void order_regs_for_local_alloc PARAMS ((void));
 extern void optimization_options PARAMS ((int, int));
 
 extern int ix86_can_use_return_insn_p PARAMS ((void));

gcc/config/i386/i386.c

@@ -412,10 +412,6 @@ int ix86_arch;
 const char *ix86_cpu_string;		/* for -mcpu=<xxx> */
 const char *ix86_arch_string;		/* for -march=<xxx> */
 
-/* Register allocation order */
-const char *ix86_reg_alloc_order;
-static char regs_allocated[FIRST_PSEUDO_REGISTER];
-
 /* # of registers to use to pass arguments.  */
 const char *ix86_regparm_string;
 
@@ -611,39 +607,6 @@ override_options ()
   mark_machine_status = ix86_mark_machine_status;
   free_machine_status = ix86_free_machine_status;
 
-  /* Validate registers in register allocation order.  */
-  if (ix86_reg_alloc_order)
-    {
-      int  ch;
-
-      for (i = 0; (ch = ix86_reg_alloc_order[i]) != '\0'; i++)
-	{
-	  int regno = -1;
-
-	  switch (ch)
-	    {
-	    case 'a':	regno = 0;	break;
-	    case 'd':	regno = 1;	break;
-	    case 'c':	regno = 2;	break;
-	    case 'b':	regno = 3;	break;
-	    case 'S':	regno = 4;	break;
-	    case 'D':	regno = 5;	break;
-	    case 'B':	regno = 6;	break;
-
-	    default:	error ("Register '%c' is unknown", ch);
-	    }
-
-	  if (regno >= 0)
-	    {
-	      if (regs_allocated[regno])
-		error ("Register '%c' already specified in allocation order",
-		       ch);
-
-	      regs_allocated[regno] = 1;
-	    }
-	}
-    }
-
   /* Validate -mregparm= value.  */
   if (ix86_regparm_string)
     {
@@ -726,61 +689,6 @@ override_options ()
     target_flags |= MASK_MMX;
 }
 
-/* A C statement (sans semicolon) to choose the order in which to
-   allocate hard registers for pseudo-registers local to a basic
-   block.
-
-   Store the desired register order in the array `reg_alloc_order'.
-   Element 0 should be the register to allocate first; element 1, the
-   next register; and so on.
-
-   The macro body should not assume anything about the contents of
-   `reg_alloc_order' before execution of the macro.
-
-   On most machines, it is not necessary to define this macro.  */
-
-void
-order_regs_for_local_alloc ()
-{
-  int i, ch, order;
-
-  /* User specified the register allocation order.  */
-
-  if (ix86_reg_alloc_order)
-    {
-      for (i = order = 0; (ch = ix86_reg_alloc_order[i]) != '\0'; i++)
-	{
-	  int regno = 0;
-
-	  switch (ch)
-	    {
-	    case 'a':	regno = 0;	break;
-	    case 'd':	regno = 1;	break;
-	    case 'c':	regno = 2;	break;
-	    case 'b':	regno = 3;	break;
-	    case 'S':	regno = 4;	break;
-	    case 'D':	regno = 5;	break;
-	    case 'B':	regno = 6;	break;
-	    }
-
-	  reg_alloc_order[order++] = regno;
-	}
-
-      for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
-	{
-	  if (! regs_allocated[i])
-	    reg_alloc_order[order++] = i;
-	}
-    }
-
-  /* If user did not specify a register allocation order, use natural order.  */
-  else
-    {
-      for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
-	reg_alloc_order[i] = i;
-    }
-}
-
 void
 optimization_options (level, size)
      int level;

gcc/config/i386/i386.h

@@ -366,8 +366,6 @@ extern int ix86_arch;
     N_("Schedule code for given CPU")},				\
   { "arch=",		&ix86_arch_string,			\
     N_("Generate code for given CPU")},				\
-  { "reg-alloc=",	&ix86_reg_alloc_order,			\
-    N_("Control allocation order of integer registers") },	\
   { "regparm=",		&ix86_regparm_string,			\
     N_("Number of registers used to pass integer arguments") },	\
   { "align-loops=",	&ix86_align_loops_string,		\
@@ -717,30 +715,17 @@ extern int ix86_arch;
    generated by allocating edx first, so restore the 'natural' order of things. */
 
 #define REG_ALLOC_ORDER 					\
-/*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/	\
-{  0, 1, 2, 3, 4, 5, 6, 7, 8,  9, 10, 11, 12, 13, 14, 15,	\
+/*ax,dx,cx,bx,si,di,bp,sp*/					\
+{  0, 1, 2, 3, 4, 5, 6, 7,					\
 /*,arg,cc,fpsr,dir,frame*/					\
      16,17, 18, 19,   20,					\
 /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/			\
     21,  22,  23,  24,  25,  26,  27,  28,			\
+/*st,st1,st2,st3,st4,st5,st6,st7*/				\
+   8,  9, 10, 11, 12, 13, 14, 15,				\
 /*mmx0,mmx1,mmx2,mmx3,mmx4,mmx5,mmx6,mmx7*/			\
     29,  30,  31,  32,  33,  34,  35,  36 }
 
-/* A C statement (sans semicolon) to choose the order in which to
-   allocate hard registers for pseudo-registers local to a basic
-   block.
-
-   Store the desired register order in the array `reg_alloc_order'.
-   Element 0 should be the register to allocate first; element 1, the
-   next register; and so on.
-
-   The macro body should not assume anything about the contents of
-   `reg_alloc_order' before execution of the macro.
-
-   On most machines, it is not necessary to define this macro.  */
-
-#define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
-
 /* Macro to conditionally modify fixed_regs/call_used_regs.  */
 #define CONDITIONAL_REGISTER_USAGE					\
   {									\
@@ -2897,7 +2882,6 @@ do { long l;						\
 /* Variables in i386.c */
 extern const char *ix86_cpu_string;		/* for -mcpu=<xxx> */
 extern const char *ix86_arch_string;		/* for -march=<xxx> */
-extern const char *ix86_reg_alloc_order;	/* register allocation order */
 extern const char *ix86_regparm_string;		/* # registers to use to pass args */
 extern const char *ix86_align_loops_string;	/* power of two alignment for loops */
 extern const char *ix86_align_jumps_string;	/* power of two alignment for non-loop jumps */

gcc/invoke.texi

@@ -457,12 +457,11 @@ in the following sections.
 -mintel-syntax -mieee-fp  -mno-fancy-math-387 @gol
 -mno-fp-ret-in-387  -msoft-float  -msvr3-shlib @gol
 -mno-wide-multiply  -mrtd  -malign-double @gol
--mreg-alloc=@var{list}  -mregparm=@var{num} @gol
 -malign-jumps=@var{num}  -malign-loops=@var{num} @gol
 -malign-functions=@var{num} -mpreferred-stack-boundary=@var{num} @gol
 -mthreads -mno-align-stringops -minline-all-stringops @gol
 -mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol
--m96bit-long-double}
+-m96bit-long-double} -mregparm=@var{num} @gol
 
 @emph{HPPA Options}
 @gccoptlist{
@@ -6646,13 +6645,6 @@ In addition, seriously incorrect code will result if you call a
 function with too many arguments.  (Normally, extra arguments are
 harmlessly ignored.)
 
-@item -mreg-alloc=@var{regs}
-Control the default allocation order of integer registers.  The
-string @var{regs} is a series of letters specifying a register.  The
-supported letters are: @code{a} allocate EAX; @code{b} allocate EBX;
-@code{c} allocate ECX; @code{d} allocate EDX; @code{S} allocate ESI;
-@code{D} allocate EDI; @code{B} allocate EBP.
-
 @item -mregparm=@var{num}
 Control how many registers are used to pass integer arguments.  By
 default, no registers are used to pass arguments, and at most 3