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glsl2: Move ir_expression_flattening to using the rvalue visitor class.

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The previous implementation was missing handling of some rvalues, such
as "if" conditions, leading to glsl-mat-int-from-ctor-* not getting
caught.
This commit is contained in:
Eric Anholt
2010-08-26 00:07:58 -07:00
parent c735d85395
commit 9fd2a8d692
1 changed files with 14 additions and 110 deletions
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124
src/glsl/ir_expression_flattening.cpp
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@@ -35,15 +35,14 @@
#include "ir.h"
#include "ir_visitor.h"
#include "ir_rvalue_visitor.h"
#include "ir_expression_flattening.h"
#include "glsl_types.h"
class ir_expression_flattening_visitor : public ir_hierarchical_visitor {
class ir_expression_flattening_visitor : public ir_rvalue_visitor {
public:
ir_expression_flattening_visitor(ir_instruction *base_ir,
bool (*predicate)(ir_instruction *ir))
ir_expression_flattening_visitor(bool (*predicate)(ir_instruction *ir))
{
this->base_ir = base_ir;
this->predicate = predicate;
}
@@ -52,42 +51,34 @@ public:
/* empty */
}
virtual ir_visitor_status visit_enter(ir_call *);
virtual ir_visitor_status visit_enter(ir_return *);
virtual ir_visitor_status visit_enter(ir_function_signature *);
virtual ir_visitor_status visit_enter(ir_if *);
virtual ir_visitor_status visit_enter(ir_loop *);
virtual ir_visitor_status visit_leave(ir_assignment *);
virtual ir_visitor_status visit_leave(ir_expression *);
virtual ir_visitor_status visit_leave(ir_swizzle *);
ir_rvalue *operand_to_temp(ir_rvalue *val);
void handle_rvalue(ir_rvalue **rvalue);
bool (*predicate)(ir_instruction *ir);
ir_instruction *base_ir;
};
void
do_expression_flattening(exec_list *instructions,
bool (*predicate)(ir_instruction *ir))
{
ir_expression_flattening_visitor v(predicate);
foreach_iter(exec_list_iterator, iter, *instructions) {
ir_instruction *ir = (ir_instruction *)iter.get();
ir_expression_flattening_visitor v(ir, predicate);
ir->accept(&v);
}
}
ir_rvalue *
ir_expression_flattening_visitor::operand_to_temp(ir_rvalue *ir)
void
ir_expression_flattening_visitor::handle_rvalue(ir_rvalue **rvalue)
{
void *ctx = base_ir;
ir_variable *var;
ir_assignment *assign;
ir_rvalue *ir = *rvalue;
if (!this->predicate(ir))
return ir;
if (!ir || !this->predicate(ir))
return;
void *ctx = talloc_parent(ir);
var = new(ctx) ir_variable(ir->type, "flattening_tmp", ir_var_temporary);
base_ir->insert_before(var);
@@ -97,92 +88,5 @@ ir_expression_flattening_visitor::operand_to_temp(ir_rvalue *ir)
NULL);
base_ir->insert_before(assign);
return new(ctx) ir_dereference_variable(var);
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_function_signature *ir)
{
do_expression_flattening(&ir->body, this->predicate);
return visit_continue_with_parent;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_loop *ir)
{
do_expression_flattening(&ir->body_instructions, this->predicate);
return visit_continue_with_parent;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_if *ir)
{
ir->condition->accept(this);
do_expression_flattening(&ir->then_instructions, this->predicate);
do_expression_flattening(&ir->else_instructions, this->predicate);
return visit_continue_with_parent;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_leave(ir_expression *ir)
{
unsigned int operand;
for (operand = 0; operand < ir->get_num_operands(); operand++) {
/* If the operand matches the predicate, then we'll assign its
* value to a temporary and deref the temporary as the operand.
*/
ir->operands[operand] = operand_to_temp(ir->operands[operand]);
}
return visit_continue;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_leave(ir_assignment *ir)
{
ir->rhs = operand_to_temp(ir->rhs);
if (ir->condition)
ir->condition = operand_to_temp(ir->condition);
return visit_continue;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_leave(ir_swizzle *ir)
{
if (this->predicate(ir->val)) {
ir->val = operand_to_temp(ir->val);
}
return visit_continue;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_call *ir)
{
/* Reminder: iterating ir_call iterates its parameters. */
foreach_iter(exec_list_iterator, iter, *ir) {
ir_rvalue *ir = (ir_rvalue *)iter.get();
ir_rvalue *new_ir = operand_to_temp(ir);
if (new_ir != ir) {
ir->replace_with(new_ir);
}
}
return visit_continue;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_return *ir)
{
if (ir->value)
ir->value = operand_to_temp(ir->value);
return visit_continue;
*rvalue = new(ctx) ir_dereference_variable(var);
}