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rtlanal.c (reg_overlap_mentioned_p): Handle STRICT_LOW_PART. 

* rtlanal.c (reg_overlap_mentioned_p): Handle STRICT_LOW_PART.  If
        either argument is CONSTANT_P, then return zero.
        * reload.c (reg_overlap_mentioned_for_reload_p): Similarly.

From-SVN: r21005
This commit is contained in:
Jeffrey A Law 1998-07-08 01:58:58 +00:00 committed by Jeff Law
parent 67a00b49d6
commit b98b49ac72
3 changed files with 20 additions and 6 deletions
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4
gcc/ChangeLog
View File

@ -1,5 +1,9 @@
Wed Jul 8 02:43:34 1998 Jeffrey A Law (law@cygnus.com)
* rtlanal.c (reg_overlap_mentioned_p): Handle STRICT_LOW_PART. If
either argument is CONSTANT_P, then return zero.
* reload.c (reg_overlap_mentioned_for_reload_p): Similarly.
* configure.in: Also look at $srcdir/gas/configure to find a
gas version #.

11
gcc/reload.c
View File

@ -5822,7 +5822,14 @@ reg_overlap_mentioned_for_reload_p (x, in)
{
int regno, endregno;
if (GET_CODE (x) == SUBREG)
/* Overly conservative. */
if (GET_CODE (x) == STRICT_LOW_PART)
x = XEXP (x, 0);
/* If either argument is a constant, then modifying X can not affect IN. */
if (CONSTANT_P (x) || CONSTANT_P (in))
return 0;
else if (GET_CODE (x) == SUBREG)
{
regno = REGNO (SUBREG_REG (x));
if (regno < FIRST_PSEUDO_REGISTER)
@ -5844,8 +5851,6 @@ reg_overlap_mentioned_for_reload_p (x, in)
abort ();
}
}
else if (CONSTANT_P (x))
return 0;
else if (GET_CODE (x) == MEM)
return refers_to_mem_for_reload_p (in);
else if (GET_CODE (x) == SCRATCH || GET_CODE (x) == PC

11
gcc/rtlanal.c
View File

@ -817,7 +817,14 @@ reg_overlap_mentioned_p (x, in)
{
int regno, endregno;
if (GET_CODE (x) == SUBREG)
/* Overly conservative. */
if (GET_CODE (x) == STRICT_LOW_PART)
x = XEXP (x, 0);
/* If either argument is a constant, then modifying X can not affect IN. */
if (CONSTANT_P (x) || CONSTANT_P (in))
return 0;
else if (GET_CODE (x) == SUBREG)
{
regno = REGNO (SUBREG_REG (x));
if (regno < FIRST_PSEUDO_REGISTER)
@ -825,8 +832,6 @@ reg_overlap_mentioned_p (x, in)
}
else if (GET_CODE (x) == REG)
regno = REGNO (x);
else if (CONSTANT_P (x))
return 0;
else if (GET_CODE (x) == MEM)
{
char *fmt;