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m68hc11.c (emit_move_after_reload): Add a REG_INC note on the insn that sets the soft frame register.

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* config/m68hc11/m68hc11.c (emit_move_after_reload): Add a REG_INC
	note on the insn that sets the soft frame register.
	(must_parenthesize): ix and iy are also reserved names.
	(print_operand_address): One more place where parenthesis are required
	to avoid confusion with register names.
	(m68hc11_gen_movhi): Allow push of stack pointer.
	(m68hc11_check_z_replacement): Fix handling of parallel with a
	clobber.
	(m68hc11_z_replacement): Must update the REG_INC notes to tell what
	the replacement register is.
	* config/m68hc11/m68hc11.h (REG_CLASS_CONTENTS): Switch Z_REGS
	and D8_REGS classes.
	(MODES_TIEABLE_P): All modes are tieable except QImode.

From-SVN: r50837
This commit is contained in:
Stephane Carrez 2002-03-15 22:44:49 +01:00 committed by Stephane Carrez
parent 1d2d9def82
commit 6272bc6859
3 changed files with 65 additions and 5 deletions
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16
gcc/ChangeLog
View File

@ -1,3 +1,19 @@
2002-03-15 Stephane Carrez <Stephane.Carrez@worldnet.fr>
* config/m68hc11/m68hc11.c (emit_move_after_reload): Add a REG_INC
note on the insn that sets the soft frame register.
(must_parenthesize): ix and iy are also reserved names.
(print_operand_address): One more place where parenthesis are required
to avoid confusion with register names.
(m68hc11_gen_movhi): Allow push of stack pointer.
(m68hc11_check_z_replacement): Fix handling of parallel with a
clobber.
(m68hc11_z_replacement): Must update the REG_INC notes to tell what
the replacement register is.
* config/m68hc11/m68hc11.h (REG_CLASS_CONTENTS): Switch Z_REGS
and D8_REGS classes.
(MODES_TIEABLE_P): All modes are tieable except QImode.
2002-03-15 Stephane Carrez <Stephane.Carrez@worldnet.fr>
* config/m68hc11/larith.asm (___adddi3): Optimize saving of result.

45
gcc/config/m68hc11/m68hc11.c
View File

@ -1520,6 +1520,17 @@ emit_move_after_reload (to, from, scratch)
XEXP (XEXP (from, 0), 0),
REG_NOTES (insn));
}
/* For 68HC11, put a REG_INC note on `sts _.frame' to prevent the cse-reg
to think that sp == _.frame and later replace a x = sp with x = _.frame.
The problem is that we are lying to gcc and use `txs' for x = sp
(which is not really true because txs is really x = sp + 1). */
else if (TARGET_M6811 && SP_REG_P (from))
{
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_INC,
from,
REG_NOTES (insn));
}
}
int
@ -2263,6 +2274,8 @@ must_parenthesize (op)
|| strcasecmp (name, "d") == 0
|| strcasecmp (name, "x") == 0
|| strcasecmp (name, "y") == 0
|| strcasecmp (name, "ix") == 0
|| strcasecmp (name, "iy") == 0
|| strcasecmp (name, "pc") == 0
|| strcasecmp (name, "sp") == 0
|| strcasecmp (name, "ccr") == 0) ? 1 : 0;
@ -2404,7 +2417,13 @@ print_operand_address (file, addr)
}
else
{
need_parenthesis = must_parenthesize (offset);
if (need_parenthesis)
asm_fprintf (file, "(");
output_addr_const (file, offset);
if (need_parenthesis)
asm_fprintf (file, ")");
asm_fprintf (file, ",");
asm_print_register (file, REGNO (base));
}
@ -2965,6 +2984,9 @@ m68hc11_gen_movhi (insn, operands)
case HARD_D_REGNUM:
output_asm_insn ("psh%1", operands);
break;
case HARD_SP_REGNUM:
output_asm_insn ("sts\t-2,sp", operands);
break;
default:
abort ();
}
@ -4361,7 +4383,12 @@ m68hc11_check_z_replacement (insn, info)
info->must_save_reg = 0;
info->must_restore_reg = 0;
}
info->last = NEXT_INSN (insn);
if (info->first != insn
&& ((info->y_used && ix_clobber)
|| (info->x_used && iy_clobber)))
info->last = insn;
else
info->last = NEXT_INSN (insn);
info->save_before_last = 1;
}
return 0;
@ -4645,6 +4672,8 @@ m68hc11_z_replacement (insn)
if (GET_CODE (body) == SET || GET_CODE (body) == PARALLEL
|| GET_CODE (insn) == CALL_INSN || GET_CODE (insn) == JUMP_INSN)
{
rtx note;
if (debug_m6811 && reg_mentioned_p (replace_reg, body))
{
printf ("Reg mentioned here...:\n");
@ -4685,6 +4714,20 @@ m68hc11_z_replacement (insn)
replace_reg_qi = gen_rtx (REG, QImode, REGNO (replace_reg));
validate_replace_rtx (z_reg_qi, replace_reg_qi, insn);
}
/* If there is a REG_INC note on Z, replace it with a
REG_INC note on the replacement register. This is necessary
to make sure that the flow pass will identify the change
and it will not remove a possible insn that saves Z. */
for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
{
if (REG_NOTE_KIND (note) == REG_INC
&& GET_CODE (XEXP (note, 0)) == REG
&& REGNO (XEXP (note, 0)) == REGNO (z_reg))
{
XEXP (note, 0) = replace_reg;
}
}
}
if (GET_CODE (insn) == CALL_INSN || GET_CODE (insn) == JUMP_INSN)
break;

9
gcc/config/m68hc11/m68hc11.h
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@ -482,11 +482,12 @@ SOFT_REG_FIRST+28, SOFT_REG_FIRST+29,SOFT_REG_FIRST+30,SOFT_REG_FIRST+31
/* Value is 1 if it is a good idea to tie two pseudo registers when one has
mode MODE1 and one has mode MODE2. If HARD_REGNO_MODE_OK could produce
different values for MODE1 and MODE2, for any hard reg, then this must be
0 for correct output. */
0 for correct output.
All modes are tieable except QImode. */
#define MODES_TIEABLE_P(MODE1, MODE2) \
(((MODE1) == (MODE2)) \
|| ((MODE1) == SImode && (MODE2) == HImode) \
|| ((MODE1) == HImode && (MODE2) == SImode))
|| ((MODE1) != QImode && (MODE2) != QImode))
/* Define the classes of registers for register constraints in the
@ -637,8 +638,8 @@ enum reg_class
/* SP_REGS */ { 0x00000008, 0x00000000 }, /* SP */ \
/* DA_REGS */ { 0x00000020, 0x00000000 }, /* A */ \
/* DB_REGS */ { 0x00000040, 0x00000000 }, /* B */ \
/* D8_REGS */ { 0x00000060, 0x00000000 }, /* A B */ \
/* Z_REGS */ { 0x00000100, 0x00000000 }, /* Z */ \
/* D8_REGS */ { 0x00000060, 0x00000000 }, /* A B */ \
/* Q_REGS */ { 0x00000062, 0x00000000 }, /* A B D */ \
/* D_OR_X_REGS */ { 0x00000003, 0x00000000 }, /* D X */ \
/* D_OR_Y_REGS */ { 0x00000006, 0x00000000 }, /* D Y */ \