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Fully connect temps and their aliases.

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This commit is contained in:
Bill Currie 2012-12-06 09:40:16 +09:00
parent 34e3ac1468
commit b6ae9867c2
2 changed files with 18 additions and 3 deletions
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1
tools/qfcc/include/statements.h
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@ -45,6 +45,7 @@ typedef struct {
struct flowvar_s *flowvar;
struct daglabel_s *daglabel;
struct operand_s *alias;
struct operand_s *alias_ops;
int users;
} tempop_t;

20
tools/qfcc/source/statements.c
View file

@ -793,7 +793,10 @@ static sblock_t *
expr_alias (sblock_t *sblock, expr_t *e, operand_t **op)
{
operand_t *aop = 0;
operand_t *top;
etype_t type;
def_t *def;
sblock = statement_subexpr (sblock, e->e.expr.e1, &aop);
if (aop->op_type == op_temp) {
while (aop->o.tempop.alias) {
@ -801,9 +804,20 @@ expr_alias (sblock_t *sblock, expr_t *e, operand_t **op)
if (aop->op_type != op_temp)
internal_error (e, "temp alias of non-temp var");
}
*op = new_operand (op_temp);
(*op)->type = low_level_type (e->e.expr.type);
(*op)->o.tempop.alias = aop;
type = low_level_type (e->e.expr.type);
if (aop->type == type) {
top = aop;
} else {
for (top = aop->o.tempop.alias_ops; top; top = top->next)
if (top->type == type)
break;
}
if (!top) {
top = new_operand (op_temp);
top->type = type;
top->o.tempop.alias = aop;
}
*op = top;
} else if (aop->op_type == op_def) {
def = aop->o.def;
while (def->alias)