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Add tempop_visit_all

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Works the same as def_visit_all, but for temp operands.
This commit is contained in:
Bill Currie 2019-06-16 16:52:49 +09:00
parent fa69aeef0f
commit bc271d8a02
2 changed files with 52 additions and 0 deletions
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3
tools/qfcc/include/statements.h
View file

@ -117,7 +117,10 @@ const char *optype_str (op_type_e type) __attribute__((const));
operand_t *def_operand (struct def_s *def, struct type_s *type);
operand_t *value_operand (struct ex_value_s *value);
int tempop_overlap (tempop_t *t1, tempop_t *t2);
operand_t *temp_operand (struct type_s *type);
int tempop_visit_all (tempop_t *tempop, int overlap,
int (*visit) (tempop_t *, void *), void *data);
operand_t *alias_operand (etype_t type, operand_t *op);
void free_operand (operand_t *op);

49
tools/qfcc/source/statements.c
View file

@ -334,6 +334,55 @@ temp_operand (type_t *type)
return op;
}
int
tempop_overlap (tempop_t *t1, tempop_t *t2)
{
int offs1 = t1->offset;
int offs2 = t2->offset;
int size1 = type_size (t1->type);
int size2 = type_size (t2->type);
if (offs1 <= offs2 && offs1 + size1 >= offs2 + size2)
return 2; // t1 fully overlaps t2
if (offs1 < offs2 + size2 && offs2 < offs1 + size1)
return 1; // t1 and t2 at least partially overlap
return 0;
}
int
tempop_visit_all (tempop_t *tempop, int overlap,
int (*visit) (tempop_t *, void *), void *data)
{
tempop_t *start_tempop = tempop;
operand_t *top;
int ret;
if ((ret = visit (tempop, data)))
return ret;
if (tempop->alias) {
top = tempop->alias;
if (top->op_type != op_temp) {
internal_error (0, "temp alias of non-temp operand");
}
tempop = &top->o.tempop;
if ((ret = visit (tempop, data)))
return ret;
}
for (top = tempop->alias_ops; top; top = top->next) {
if (top->op_type != op_temp) {
internal_error (0, "temp alias of non-temp operand");
}
tempop = &top->o.tempop;
if (tempop == start_tempop)
continue;
if (overlap && tempop_overlap (tempop, start_tempop) < overlap)
continue;
if ((ret = visit (tempop, data)))
return ret;
}
return 0;
}
operand_t *
alias_operand (etype_t type, operand_t *op)
{