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sh-protos.h (sh_pr_n_sets): Declare. 

* sh-protos.h (sh_pr_n_sets): Declare.
	* sh.c (calc_live_regs): If the initial value for PR has been copied,
	look at the copy to determine if PR needs to be saved.
	sh_pr_n_sets: New function.
	* sh.h (RETURN_ADDR_RTX): Use get_hard_reg_initial_val.
	(ALLOCATE_INITIAL_VALUE): Define.

	* sh.c (initial_elimination_offset):
	Fix RETURN_ADDRESS_POINTER_REGNUM case.

From-SVN: r45717
This commit is contained in:
J"orn Rennecke 2001-09-21 00:53:28 +00:00 committed by Joern Rennecke
parent 385b6e2d89
commit 3007d592bf
4 changed files with 42 additions and 4 deletions
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12
gcc/ChangeLog
View File

@ -1,3 +1,15 @@
Fri Sep 21 01:49:41 2001 J"orn Rennecke <amylaar@redhat.com>
* sh-protos.h (sh_pr_n_sets): Declare.
* sh.c (calc_live_regs): If the initial value for PR has been copied,
look at the copy to determine if PR needs to be saved.
sh_pr_n_sets: New function.
* sh.h (RETURN_ADDR_RTX): Use get_hard_reg_initial_val.
(ALLOCATE_INITIAL_VALUE): Define.
* sh.c (initial_elimination_offset):
Fix RETURN_ADDRESS_POINTER_REGNUM case.
Fri Sep 21 01:13:56 2001 J"orn Rennecke <amylaar@redhat.com>
* integrate.c (allocate_initial_values): New function.

1
gcc/config/sh/sh-protos.h
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@ -119,6 +119,7 @@ extern void sh_expand_epilogue PARAMS ((void));
extern int sh_need_epilogue PARAMS ((void));
extern int initial_elimination_offset PARAMS ((int, int));
extern int fldi_ok PARAMS ((void));
extern int sh_pr_n_sets PARAMS ((void));
#ifdef HARD_CONST
extern void fpscr_set_from_mem PARAMS ((int, HARD_REG_SET));

24
gcc/config/sh/sh.c
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@ -3959,6 +3959,8 @@ calc_live_regs (count_ptr, live_regs_mask2)
int live_regs_mask = 0;
int count;
int interrupt_handler;
rtx pr_initial;
int pr_live;
if ((lookup_attribute
("interrupt_handler",
@ -3979,14 +3981,20 @@ calc_live_regs (count_ptr, live_regs_mask2)
target_flags &= ~FPU_SINGLE_BIT;
break;
}
pr_initial = has_hard_reg_initial_val (Pmode, PR_REG);
pr_live = (pr_initial
? REGNO (pr_initial) != PR_REG
: regs_ever_live[PR_REG]);
for (count = 0, reg = FIRST_PSEUDO_REGISTER - 1; reg >= 0; reg--)
{
if ((interrupt_handler && ! pragma_trapa)
if (reg == PR_REG
? pr_live
: (interrupt_handler && ! pragma_trapa)
? (/* Need to save all the regs ever live. */
(regs_ever_live[reg]
|| (call_used_regs[reg]
&& (! fixed_regs[reg] || reg == MACH_REG || reg == MACL_REG)
&& regs_ever_live[PR_REG]))
&& pr_live))
&& reg != STACK_POINTER_REGNUM && reg != ARG_POINTER_REGNUM
&& reg != RETURN_ADDRESS_POINTER_REGNUM
&& reg != T_REG && reg != GBR_REG && reg != FPSCR_REG)
@ -4598,7 +4606,7 @@ initial_elimination_offset (from, to)
if (from == RETURN_ADDRESS_POINTER_REGNUM
&& (to == FRAME_POINTER_REGNUM || to == STACK_POINTER_REGNUM))
return UNITS_PER_WORD + total_auto_space;
return total_auto_space;
abort ();
}
@ -5638,3 +5646,13 @@ sh_adjust_cost (insn, link, dep_insn, cost)
return cost;
}
/* For use by ALLOCATE_INITIAL_VALUE. Note that sh.md contains some
'special function' patterns (type sfunc) that clobber pr, but that
do not look like function calls to leaf_function_p. Hence we must
do this extra check. */
int
sh_pr_n_sets ()
{
return REG_N_SETS (PR_REG);
}

9
gcc/config/sh/sh.h
View File

@ -1293,7 +1293,7 @@ extern int current_function_anonymous_args;
#define RETURN_ADDR_RTX(COUNT, FRAME) \
(((COUNT) == 0) \
? gen_rtx_MEM (Pmode, gen_rtx_REG (Pmode, RETURN_ADDRESS_POINTER_REGNUM)) \
? get_hard_reg_initial_val (Pmode, PR_REG) \
: (rtx) 0)
/* Generate necessary RTL for __builtin_saveregs(). */
@ -2369,4 +2369,11 @@ extern struct rtx_def *fpscr_rtx;
1: .long " USER_LABEL_PREFIX #func " - 0b\n\
2:")
#define ALLOCATE_INITIAL_VALUE(hard_reg) \
(REGNO (hard_reg) == PR_REG \
? (current_function_is_leaf && ! sh_pr_n_sets () \
? (hard_reg) \
: gen_rtx_MEM (Pmode, arg_pointer_rtx)) \
: NULL_RTX)
#endif /* ! GCC_SH_H */