* 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
+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.
/* 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));
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;
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)
{
target_flags |= MASK_MMX;
}
\f
-/* 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;
- }
-}
-\f
void
optimization_options (level, size)
int level;
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, \
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 \
{ \
/* 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 */
-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{
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
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