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combine.c (gen_lowpart_for_combine): Update handling of subregs_of_mode

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* combine.c (gen_lowpart_for_combine): Update handling of
	subregs_of_mode
	* flow.c (life_analysis, mark_used_regs): Likewise.
	* regclass.c (subregs_of_mode): Turn into single bitmap.
	(cannot_change-mode_set_regs, invalid_mode_change_p): Update
	dealing with subregs_of_mode
	* regs.h (subregs_of_mode): Update prototype.

From-SVN: r63552
This commit is contained in:
Jan Hubicka 2003-02-28 11:11:47 +01:00 committed by Jan Hubicka
parent e459243b87
commit 10a3fdd926
7 changed files with 45 additions and 34 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
Fri Feb 28 11:09:14 CET 2003 Jan Hubicka <jh@suse.cz>
* combine.c (gen_lowpart_for_combine): Update handling of
subregs_of_mode
* flow.c (life_analysis, mark_used_regs): Likewise.
* regclass.c (subregs_of_mode): Turn into single bitmap.
(cannot_change-mode_set_regs, invalid_mode_change_p): Update
dealing with subregs_of_mode
* regs.h (subregs_of_mode): Update prototype.
2003-02-28 Josef Zlomek <zlomekj@suse.cz>
* emit-rtl.c (set_reg_attrs_for_parm): New function.

5
gcc/combine.c
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@ -10201,8 +10201,9 @@ gen_lowpart_for_combine (mode, x)
&& GET_CODE (result) == SUBREG
&& GET_CODE (SUBREG_REG (result)) == REG
&& REGNO (SUBREG_REG (result)) >= FIRST_PSEUDO_REGISTER)
SET_REGNO_REG_SET (&subregs_of_mode[GET_MODE (result)],
REGNO (SUBREG_REG (result)));
bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (result))
* MAX_MACHINE_MODE
+ GET_MODE (result));
#endif
if (result)

16
gcc/flow.c
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@ -436,11 +436,7 @@ life_analysis (f, file, flags)
#ifdef CANNOT_CHANGE_MODE_CLASS
if (flags & PROP_REG_INFO)
{
int j;
for (j=0; j < NUM_MACHINE_MODES; ++j)
INIT_REG_SET (&subregs_of_mode[j]);
}
bitmap_initialize (&subregs_of_mode, 1);
#endif
if (! optimize)
@ -3845,8 +3841,9 @@ mark_used_regs (pbi, x, cond, insn)
#ifdef CANNOT_CHANGE_MODE_CLASS
if (GET_CODE (SUBREG_REG (x)) == REG
&& REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER)
SET_REGNO_REG_SET (&subregs_of_mode[GET_MODE (x)],
REGNO (SUBREG_REG (x)));
bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (x))
* MAX_MACHINE_MODE
+ GET_MODE (x));
#endif
/* While we're here, optimize this case. */
@ -3894,8 +3891,9 @@ mark_used_regs (pbi, x, cond, insn)
if (GET_CODE (testreg) == SUBREG
&& GET_CODE (SUBREG_REG (testreg)) == REG
&& REGNO (SUBREG_REG (testreg)) >= FIRST_PSEUDO_REGISTER)
SET_REGNO_REG_SET (&subregs_of_mode[GET_MODE (testreg)],
REGNO (SUBREG_REG (testreg)));
bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (testreg))
* MAX_MACHINE_MODE
+ GET_MODE (testreg));
#endif
/* Modifying a single register in an alternate mode

3
gcc/reg-stack.c
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@ -428,9 +428,6 @@ reg_to_stack (first, file)
/* Clean up previous run. */
stack_regs_mentioned_data = 0;
if (!optimize)
split_all_insns (0);
/* See if there is something to do. Flow analysis is quite
expensive so we might save some compilation time. */
for (i = FIRST_STACK_REG; i <= LAST_STACK_REG; i++)

37
gcc/regclass.c
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@ -232,9 +232,9 @@ static char *in_inc_dec;
#endif /* FORBIDDEN_INC_DEC_CLASSES */
#ifdef CANNOT_CHANGE_MODE_CLASS
/* All registers that have been subreged. Indexed by mode, where each
entry is a regset of registers. */
regset_head subregs_of_mode [NUM_MACHINE_MODES];
/* All registers that have been subreged. Indexed by regno * MAX_MACHINE_MODE
+ mode. */
bitmap_head subregs_of_mode;
#endif
/* Sample MEM values for use by memory_move_secondary_cost. */
@ -2638,16 +2638,18 @@ cannot_change_mode_set_regs (used, from, regno)
unsigned int regno;
{
enum machine_mode to;
int n, i;
int start = regno * MAX_MACHINE_MODE;
for (to = VOIDmode; to < MAX_MACHINE_MODE; ++to)
if (REGNO_REG_SET_P (&subregs_of_mode[to], regno))
{
int i;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (! TEST_HARD_REG_BIT (*used, i)
&& REG_CANNOT_CHANGE_MODE_P (i, from, to))
SET_HARD_REG_BIT (*used, i);
}
EXECUTE_IF_SET_IN_BITMAP (&subregs_of_mode, start, n,
if (n >= MAX_MACHINE_MODE + start)
return;
to = n - start;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (! TEST_HARD_REG_BIT (*used, i)
&& REG_CANNOT_CHANGE_MODE_P (i, from, to))
SET_HARD_REG_BIT (*used, i);
);
}
/* Return 1 if REGNO has had an invalid mode change in CLASS from FROM
@ -2660,11 +2662,16 @@ invalid_mode_change_p (regno, class, from_mode)
enum machine_mode from_mode;
{
enum machine_mode to_mode;
int n;
int start = regno * MAX_MACHINE_MODE;
for (to_mode = 0; to_mode < NUM_MACHINE_MODES; ++to_mode)
if (REGNO_REG_SET_P (&subregs_of_mode[(int) to_mode], regno)
&& CANNOT_CHANGE_MODE_CLASS (from_mode, to_mode, class))
EXECUTE_IF_SET_IN_BITMAP (&subregs_of_mode, start, n,
if (n >= MAX_MACHINE_MODE + start)
return 0;
to_mode = n - start;
if (CANNOT_CHANGE_MODE_CLASS (from_mode, to_mode, class))
return 1;
);
return 0;
}
#endif /* CANNOT_CHANGE_MODE_CLASS */

2
gcc/regs.h
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@ -66,7 +66,7 @@ typedef struct reg_info_def
extern varray_type reg_n_info;
extern regset_head subregs_of_mode [NUM_MACHINE_MODES];
extern bitmap_head subregs_of_mode;
/* Indexed by n, gives number of times (REG n) is used or set. */

6
gcc/toplev.c
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@ -3458,7 +3458,9 @@ rest_of_compilation (decl)
#endif
/* If optimizing, then go ahead and split insns now. */
#ifndef STACK_REGS
if (optimize > 0)
#endif
split_all_insns (0);
cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
@ -3551,10 +3553,6 @@ rest_of_compilation (decl)
close_dump_file (DFI_ce3, print_rtl_with_bb, insns);
timevar_pop (TV_IFCVT2);
}
#ifdef STACK_REGS
if (optimize)
split_all_insns (1);
#endif
#ifdef INSN_SCHEDULING
if (optimize > 0 && flag_schedule_insns_after_reload)