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Use ir_rvalue::variable_referenced instead of open-coding it

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This commit is contained in:
Ian Romanick 2010-05-14 17:36:00 -07:00
parent 2b3c476fa0
commit 5d82e239f9
1 changed files with 6 additions and 24 deletions
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30
ir_copy_propagation.cpp
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@ -234,32 +234,14 @@ propagate_copies(ir_instruction *ir, exec_list *acp)
static void
kill_invalidated_copies(ir_assignment *ir, exec_list *acp)
{
ir_instruction *current = ir->lhs;
ir_variable *var = ir->lhs->variable_referenced();
assert(var != NULL);
/* Walk down the dereference chain to find the variable at the end
* of it that we're actually modifying.
*/
while (current != NULL) {
ir_swizzle *swiz;
ir_dereference *deref;
foreach_iter(exec_list_iterator, iter, *acp) {
acp_entry *entry = (acp_entry *)iter.get();
if ((swiz = current->as_swizzle())) {
current = swiz->val;
} else if ((deref = current->as_dereference())) {
current = deref->var;
} else {
ir_variable *var = current->as_variable();
assert(var);
foreach_iter(exec_list_iterator, iter, *acp) {
acp_entry *entry = (acp_entry *)iter.get();
if (entry->lhs == var || entry->rhs == var) {
entry->remove();
}
}
current = NULL;
break;
if (entry->lhs == var || entry->rhs == var) {
entry->remove();
}
}
}