+#include <algorithm>
#include <msp/core/hash.h>
#include <msp/core/raii.h>
#include <msp/strings/lexicalcast.h>
stage(0),
r_any_resolved(false),
record_target(false),
- r_self_referencing(false),
- r_assignment_target(0)
+ r_self_referencing(false)
{ }
bool VariableResolver::apply(Stage &s)
block.variables.clear();
}
-void VariableResolver::visit_and_replace(RefPtr<Expression> &expr)
+void VariableResolver::visit(RefPtr<Expression> &expr)
{
r_replacement_expr = 0;
expr->visit(*this);
if(r_replacement_expr)
{
expr = r_replacement_expr;
+ /* Don't record assignment target when doing a replacement, because chain
+ information won't be correct. */
+ r_assignment_target.declaration = 0;
r_any_resolved = true;
}
r_replacement_expr = 0;
}
+void VariableResolver::check_assignment_target(Statement *declaration)
+{
+ if(record_target)
+ {
+ if(r_assignment_target.declaration)
+ {
+ /* More than one reference found in assignment target. Unable to
+ determine what the primary target is. */
+ record_target = false;
+ r_assignment_target.declaration = 0;
+ }
+ else
+ r_assignment_target.declaration = declaration;
+ }
+ // TODO This check is overly broad and may prevent some optimizations.
+ else if(declaration && declaration==r_assignment_target.declaration)
+ r_self_referencing = true;
+}
+
void VariableResolver::visit(VariableReference &var)
{
VariableDeclaration *declaration = 0;
r_any_resolved |= (declaration!=var.declaration);
var.declaration = declaration;
- if(record_target)
- {
- if(r_assignment_target)
- {
- /* More than one variable reference found in assignment target.
- Unable to determine what the primary target is. */
- record_target = false;
- r_assignment_target = 0;
- }
- else
- r_assignment_target = var.declaration;
- }
- else if(var.declaration && var.declaration==r_assignment_target)
- r_self_referencing = true;
+ check_assignment_target(var.declaration);
}
void VariableResolver::visit(InterfaceBlockReference &iface)
InterfaceBlock *declaration = (i!=stage->interface_blocks.end() ? i->second : 0);
r_any_resolved |= (declaration!=iface.declaration);
iface.declaration = declaration;
+
+ check_assignment_target(iface.declaration);
+}
+
+void VariableResolver::add_to_chain(Assignment::Target::ChainType type, unsigned index)
+{
+ if(r_assignment_target.chain_len<7)
+ r_assignment_target.chain[r_assignment_target.chain_len] = type | min<unsigned>(index, 0x3F);
+ ++r_assignment_target.chain_len;
}
void VariableResolver::visit(MemberAccess &memacc)
{
- visit_and_replace(memacc.left);
+ TraversingVisitor::visit(memacc);
VariableDeclaration *declaration = 0;
if(StructDeclaration *strct = dynamic_cast<StructDeclaration *>(memacc.left->type))
{
map<string, VariableDeclaration *>::iterator i = strct->members.variables.find(memacc.member);
if(i!=strct->members.variables.end())
+ {
declaration = i->second;
+
+ if(record_target)
+ {
+ unsigned index = 0;
+ for(NodeList<Statement>::const_iterator j=strct->members.body.begin(); (j!=strct->members.body.end() && j->get()!=i->second); ++j)
+ ++index;
+
+ add_to_chain(Assignment::Target::MEMBER, index);
+ }
+ }
+ }
+ else if(BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(memacc.left->type))
+ {
+ bool scalar_swizzle = ((basic->kind==BasicTypeDeclaration::INT || basic->kind==BasicTypeDeclaration::FLOAT) && memacc.member.size()==1);
+ bool vector_swizzle = (basic->kind==BasicTypeDeclaration::VECTOR && memacc.member.size()<=4);
+ if(scalar_swizzle || vector_swizzle)
+ {
+ static const char component_names[] = { 'x', 'r', 's', 'y', 'g', 't', 'z', 'b', 'p', 'w', 'a', 'q' };
+
+ bool ok = true;
+ UInt8 components[4] = { };
+ for(unsigned i=0; (ok && i<memacc.member.size()); ++i)
+ ok = ((components[i] = (find(component_names, component_names+12, memacc.member[i])-component_names)/3) < 4);
+
+ if(ok)
+ {
+ Swizzle *swizzle = new Swizzle;
+ swizzle->source = memacc.source;
+ swizzle->line = memacc.line;
+ swizzle->oper = memacc.oper;
+ swizzle->left = memacc.left;
+ swizzle->component_group = memacc.member;
+ swizzle->count = memacc.member.size();
+ copy(components, components+memacc.member.size(), swizzle->components);
+ r_replacement_expr = swizzle;
+ }
+ }
}
r_any_resolved |= (declaration!=memacc.declaration);
memacc.declaration = declaration;
}
-void VariableResolver::visit(UnaryExpression &unary)
+void VariableResolver::visit(Swizzle &swizzle)
{
- visit_and_replace(unary.expression);
+ TraversingVisitor::visit(swizzle);
+
+ if(record_target)
+ {
+ unsigned mask = 0;
+ for(unsigned i=0; i<swizzle.count; ++i)
+ mask |= 1<<swizzle.components[i];
+ add_to_chain(Assignment::Target::SWIZZLE, mask);
+ }
}
void VariableResolver::visit(BinaryExpression &binary)
/* The subscript expression is not a part of the primary assignment
target. */
SetFlag set(record_target, false);
- visit_and_replace(binary.right);
+ visit(binary.right);
+ }
+ visit(binary.left);
+
+ if(record_target)
+ {
+ unsigned index = 0x3F;
+ if(Literal *literal_subscript = dynamic_cast<Literal *>(binary.right.get()))
+ if(literal_subscript->value.check_type<int>())
+ index = literal_subscript->value.value<int>();
+ add_to_chain(Assignment::Target::ARRAY, index);
}
- visit_and_replace(binary.left);
}
else
- {
- visit_and_replace(binary.left);
- visit_and_replace(binary.right);
- }
+ TraversingVisitor::visit(binary);
}
void VariableResolver::visit(Assignment &assign)
{
{
SetFlag set(record_target);
- r_assignment_target = 0;
- visit_and_replace(assign.left);
- r_any_resolved |= (r_assignment_target!=assign.target_declaration);
- assign.target_declaration = r_assignment_target;
+ r_assignment_target = Assignment::Target();
+ visit(assign.left);
+ r_any_resolved |= (r_assignment_target<assign.target || assign.target<r_assignment_target);
+ assign.target = r_assignment_target;
}
r_self_referencing = false;
- visit_and_replace(assign.right);
+ visit(assign.right);
assign.self_referencing = (r_self_referencing || assign.oper->token[0]!='=');
}
-void VariableResolver::visit(FunctionCall &call)
-{
- for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
- visit_and_replace(*i);
-}
-
void VariableResolver::visit(VariableDeclaration &var)
{
- if(var.layout)
- var.layout->visit(*this);
- if(var.array_size)
- visit_and_replace(var.array_size);
- if(var.init_expression)
- visit_and_replace(var.init_expression);
+ TraversingVisitor::visit(var);
current_block->variables.insert(make_pair(var.name, &var));
}
resolve(memacc, memacc.declaration->type_declaration, memacc.left->lvalue);
}
+void ExpressionResolver::visit(Swizzle &swizzle)
+{
+ TraversingVisitor::visit(swizzle);
+
+ if(BasicTypeDeclaration *left_basic = dynamic_cast<BasicTypeDeclaration *>(swizzle.left->type))
+ {
+ BasicTypeDeclaration *left_elem = get_element_type(*left_basic);
+ if(swizzle.count==1)
+ resolve(swizzle, left_elem, swizzle.left->lvalue);
+ else if(left_basic->kind==BasicTypeDeclaration::VECTOR && left_elem)
+ resolve(swizzle, find_type(*left_elem, left_basic->kind, swizzle.count), swizzle.left->lvalue);
+ }
+}
+
void ExpressionResolver::visit(UnaryExpression &unary)
{
TraversingVisitor::visit(unary);
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