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cse.c (struct change_cc_mode_args): New structure. 

2004-11-16  Andreas Krebbel  <krebbel1@de.ibm.com>

	* gcc/cse.c (struct change_cc_mode_args): New structure.
	(cse_change_cc_mode_insn): New function.
	(cse_change_cc_mode): Use validate_change to perfom changes.
	(cse_change_cc_mode_insns, cse_condition_code_reg):
	Call cse_change_cc_mode_insn.

From-SVN: r90728
This commit is contained in:
Andreas Krebbel 2004-11-16 11:38:11 +00:00 committed by Ulrich Weigand
parent be06f47bc1
commit fc188d37b3
2 changed files with 52 additions and 12 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2004-11-16 Andreas Krebbel <krebbel1@de.ibm.com>
* gcc/cse.c (struct change_cc_mode_args): New structure.
(cse_change_cc_mode_insn): New function.
(cse_change_cc_mode): Use validate_change to perfom changes.
(cse_change_cc_mode_insns, cse_condition_code_reg):
Call cse_change_cc_mode_insn.
2004-11-16 Steven Bosscher <stevenb@suse.de>
* stack.h: Remove.

56
gcc/cse.c
View File

@ -263,6 +263,14 @@ struct qty_table_elem
/* The table of all qtys, indexed by qty number. */
static struct qty_table_elem *qty_table;
/* Structure used to pass arguments via for_each_rtx to function
cse_change_cc_mode. */
struct change_cc_mode_args
{
rtx insn;
rtx newreg;
};
#ifdef HAVE_cc0
/* For machines that have a CC0, we do not record its value in the hash
table since its use is guaranteed to be the insn immediately following
@ -653,6 +661,7 @@ static bool insn_live_p (rtx, int *);
static bool set_live_p (rtx, rtx, int *);
static bool dead_libcall_p (rtx, int *);
static int cse_change_cc_mode (rtx *, void *);
static void cse_change_cc_mode_insn (rtx, rtx);
static void cse_change_cc_mode_insns (rtx, rtx, rtx);
static enum machine_mode cse_cc_succs (basic_block, rtx, rtx, bool);
@ -7303,19 +7312,46 @@ delete_trivially_dead_insns (rtx insns, int nreg)
static int
cse_change_cc_mode (rtx *loc, void *data)
{
rtx newreg = (rtx) data;
struct change_cc_mode_args* args = (struct change_cc_mode_args*)data;
if (*loc
&& REG_P (*loc)
&& REGNO (*loc) == REGNO (newreg)
&& GET_MODE (*loc) != GET_MODE (newreg))
&& REGNO (*loc) == REGNO (args->newreg)
&& GET_MODE (*loc) != GET_MODE (args->newreg))
{
*loc = newreg;
validate_change (args->insn, loc, args->newreg, 1);
return -1;
}
return 0;
}
/* Change the mode of any reference to the register REGNO (NEWREG) to
GET_MODE (NEWREG) in INSN. */
static void
cse_change_cc_mode_insn (rtx insn, rtx newreg)
{
struct change_cc_mode_args args;
int success;
if (!INSN_P (insn))
return;
args.insn = insn;
args.newreg = newreg;
for_each_rtx (&PATTERN (insn), cse_change_cc_mode, &args);
for_each_rtx (&REG_NOTES (insn), cse_change_cc_mode, &args);
/* If the following assertion was triggered, there is most probably
something wrong with the cc_modes_compatible back end function.
CC modes only can be considered compatible if the insn - with the mode
replaced by any of the compatible modes - can still be recognized. */
success = apply_change_group ();
gcc_assert (success);
}
/* Change the mode of any reference to the register REGNO (NEWREG) to
GET_MODE (NEWREG), starting at START. Stop before END. Stop at
any instruction which modifies NEWREG. */
@ -7333,8 +7369,7 @@ cse_change_cc_mode_insns (rtx start, rtx end, rtx newreg)
if (reg_set_p (newreg, insn))
return;
for_each_rtx (&PATTERN (insn), cse_change_cc_mode, newreg);
for_each_rtx (&REG_NOTES (insn), cse_change_cc_mode, newreg);
cse_change_cc_mode_insn (insn, newreg);
}
}
@ -7443,6 +7478,8 @@ cse_cc_succs (basic_block bb, rtx cc_reg, rtx cc_src, bool can_change_mode)
{
gcc_assert (can_change_mode);
mode = comp_mode;
/* The modified insn will be re-recognized later. */
PUT_MODE (cc_src, mode);
}
}
@ -7622,12 +7659,7 @@ cse_condition_code_reg (void)
{
rtx newreg = gen_rtx_REG (mode, REGNO (cc_reg));
/* Change the mode of CC_REG in CC_SRC_INSN to
GET_MODE (NEWREG). */
for_each_rtx (&PATTERN (cc_src_insn), cse_change_cc_mode,
newreg);
for_each_rtx (&REG_NOTES (cc_src_insn), cse_change_cc_mode,
newreg);
cse_change_cc_mode_insn (cc_src_insn, newreg);
/* Do the same in the following insns that use the
current value of CC_REG within BB. */