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reload.h (earlyclobber_operand_p): Declare.

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* reload.h (earlyclobber_operand_p): Declare.
	* reload.c (earlyclobber_operand_p): Don't declare.  No longer static.
	* reload1.c (reload_reg_free_for_value_p):  RELOAD_OTHER reloads with
	an earlyclobbered output conflict with RELOAD_INPUT reloads - handle
	case where the RELOAD_OTHER reload is new.  Use earlyclobber_operand_p.

From-SVN: r30202
This commit is contained in:
J"orn Rennecke 1999-10-27 02:14:12 +00:00 committed by Joern Rennecke
parent a05924f91b
commit 09a308fe08
4 changed files with 26 additions and 6 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
Wed Oct 27 03:09:23 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
* reload.h (earlyclobber_operand_p): Declare.
* reload.c (earlyclobber_operand_p): Don't declare. No longer static.
* reload1.c (reload_reg_free_for_value_p): RELOAD_OTHER reloads with
an earlyclobbered output conflict with RELOAD_INPUT reloads - handle
case where the RELOAD_OTHER reload is new. Use earlyclobber_operand_p.
Tue Oct 26 18:23:38 1999 Jan Hubicka <hubicka@freesoft.cz>
Richard Henderson <rth@cygnus.com>

3
gcc/reload.c
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@ -252,7 +252,6 @@ static int find_reusable_reload PROTO((rtx *, rtx, enum reg_class,
static rtx find_dummy_reload PROTO((rtx, rtx, rtx *, rtx *,
enum machine_mode, enum machine_mode,
enum reg_class, int, int));
static int earlyclobber_operand_p PROTO((rtx));
static int hard_reg_set_here_p PROTO((int, int, rtx));
static struct decomposition decompose PROTO((rtx));
static int immune_p PROTO((rtx, rtx, struct decomposition));
@ -1921,7 +1920,7 @@ find_dummy_reload (real_in, real_out, inloc, outloc,
/* Return 1 if X is an operand of an insn that is being earlyclobbered. */
static int
int
earlyclobber_operand_p (x)
rtx x;
{

3
gcc/reload.h
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@ -354,6 +354,9 @@ extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *,
/* Return 1 if register REGNO is the subject of a clobber in insn INSN. */
extern int regno_clobbered_p PROTO((int, rtx));
/* Return 1 if X is an operand of an insn that is being earlyclobbered. */
int earlyclobber_operand_p PROTO((rtx));
/* Functions in reload1.c: */
extern int reloads_conflict PROTO ((int, int));

18
gcc/reload1.c
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@ -5291,6 +5291,10 @@ reload_reg_free_for_value_p (regno, opnum, type, value, out, reloadnum,
int ignore_address_reloads;
{
int time1;
/* Set if we see an input reload that must not share its reload register
with any new earlyclobber, but might otherwise share the reload
register with an output or input-output reload. */
int check_earlyclobber = 0;
int i;
int copy = 0;
@ -5372,7 +5376,7 @@ reload_reg_free_for_value_p (regno, opnum, type, value, out, reloadnum,
if (! rld[i].in || ! rtx_equal_p (rld[i].in, value)
|| rld[i].out || out)
{
int j, time2;
int time2;
switch (rld[i].when_needed)
{
case RELOAD_FOR_OTHER_ADDRESS:
@ -5411,6 +5415,7 @@ reload_reg_free_for_value_p (regno, opnum, type, value, out, reloadnum,
break;
case RELOAD_FOR_INPUT:
time2 = rld[i].opnum * 4 + 4;
check_earlyclobber = 1;
break;
/* rld[i].opnum * 4 + 4 <= (MAX_RECOG_OPERAND - 1) * 4 + 4
== MAX_RECOG_OPERAND * 4 */
@ -5423,6 +5428,7 @@ reload_reg_free_for_value_p (regno, opnum, type, value, out, reloadnum,
break;
case RELOAD_FOR_OPERAND_ADDRESS:
time2 = MAX_RECOG_OPERANDS * 4 + 2;
check_earlyclobber = 1;
break;
case RELOAD_FOR_INSN:
time2 = MAX_RECOG_OPERANDS * 4 + 3;
@ -5452,9 +5458,8 @@ reload_reg_free_for_value_p (regno, opnum, type, value, out, reloadnum,
{
time2 = MAX_RECOG_OPERANDS * 4 + 4;
/* Earlyclobbered outputs must conflict with inputs. */
for (j = 0; j < n_earlyclobbers; j++)
if (rld[i].out == reload_earlyclobbers[j])
time2 = MAX_RECOG_OPERANDS * 4 + 3;
if (earlyclobber_operand_p (rld[i].out))
time2 = MAX_RECOG_OPERANDS * 4 + 3;
break;
}
@ -5478,6 +5483,11 @@ reload_reg_free_for_value_p (regno, opnum, type, value, out, reloadnum,
}
}
}
/* Earlyclobbered outputs must conflict with inputs. */
if (check_earlyclobber && out && earlyclobber_operand_p (out))
return 0;
return 1;
}