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From-SVN: r1314
This commit is contained in:
Richard Kenner 1992-06-27 13:52:16 -04:00
parent e4600702d9
commit 54d234208a
1 changed files with 18 additions and 6 deletions
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24
gcc/regclass.c
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@ -408,18 +408,30 @@ static struct costs op_costs[MAX_RECOG_OPERANDS];
static char *prefclass;
/* preferred_or_nothing[R] is nonzero if we should put pseudo number R
in memory if we can't get its preferred class.
/* altclass[R] is a register class that we should use for allocating
pseudo number R if no register in the preferred class is available.
If no register in this class is available, memory is preferred.
It might appear to be more general to have a bitmask of classes here,
but since it is recommended that there be a class corresponding to the
union of most major pair of classes, that generality is not required.
This is available after `regclass' is run. */
static char *preferred_or_nothing;
static char *altclass;
/* Record the depth of loops that we are in, 1 for no loops. */
/* Record the depth of loops that we are in. */
static int loop_depth;
void reg_class_record ();
void record_address_regs ();
/* Account for the fact that insns within a loop are executed very commonly,
but don't keep doing this as loops go too deep. */
static int loop_cost;
static int copy_cost ();
static void record_reg_classes ();
static void record_address_regs ();
/* Return the reg_class in which pseudo reg number REGNO is best allocated.