Tim Starling
79 linhas
2.6 KiB
C++
79 linhas
2.6 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include "hphp/compiler/analysis/alias_manager.h"
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#include "hphp/compiler/analysis/dictionary.h"
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#include "hphp/compiler/expression/expression.h"
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#include "hphp/compiler/statement/statement.h"
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#include "hphp/compiler/statement/method_statement.h"
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#include "hphp/compiler/statement/statement_list.h"
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using namespace HPHP;
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using std::vector;
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///////////////////////////////////////////////////////////////////////////////
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Dictionary::Dictionary(AliasManager &am) : m_am(am) {
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m_idMap.push_back(ExpressionPtr());
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}
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void Dictionary::build(MethodStatementPtr m) {
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if (StatementPtr s = m->getStmts()) {
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build(s);
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}
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}
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void Dictionary::build(StatementPtr stmt) {
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for (int i = 0, n = stmt->getKidCount(); i < n; i++) {
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if (ConstructPtr kid = stmt->getNthKid(i)) {
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if (StatementPtr s = boost::dynamic_pointer_cast<Statement>(kid)) {
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if (FunctionWalker::SkipRecurse(s)) continue;
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build(s);
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} else {
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ExpressionPtr e = boost::dynamic_pointer_cast<Expression>(kid);
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build(e);
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}
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}
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}
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}
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void Dictionary::build(ExpressionPtr e) {
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for (int i = 0, n = e->getKidCount(); i < n; i++) {
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if (ExpressionPtr kid = e->getNthExpr(i)) {
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build(kid);
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}
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}
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visit(e);
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}
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void Dictionary::record(ExpressionPtr e) {
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e->setCanonID(m_idMap.size());
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m_idMap.push_back(e);
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}
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void Dictionary::beginBlock(ControlBlock *b) {
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ControlFlowGraph *g = m_am.graph();
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always_assert(g);
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m_width = g->bitWidth();
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m_altered = b->getRow(DataFlow::Altered);
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m_available = g->rowExists(DataFlow::Available) ?
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b->getRow(DataFlow::Available) : 0;
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m_anticipated = g->rowExists(DataFlow::Anticipated) ?
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b->getRow(DataFlow::Anticipated) : 0;
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}
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