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//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// AddDefaultReturnStatements.cpp: Add default return statements to functions that do not end in a
// return.
//
#include "compiler/translator/tree_ops/d3d/AddDefaultReturnStatements.h"
#include "compiler/translator/Compiler.h"
#include "compiler/translator/IntermNode.h"
#include "compiler/translator/tree_util/IntermNode_util.h"
#include "compiler/translator/util.h"
namespace sh
{
namespace
{
bool NeedsReturnStatement(TIntermFunctionDefinition *node, TType *returnType)
{
*returnType = node->getFunctionPrototype()->getType();
if (returnType->getBasicType() == EbtVoid)
{
return false;
}
TIntermBlock *bodyNode = node->getBody();
TIntermBranch *returnNode = bodyNode->getSequence()->back()->getAsBranchNode();
if (returnNode != nullptr && returnNode->getFlowOp() == EOpReturn)
{
return false;
}
return true;
}
} // anonymous namespace
bool AddDefaultReturnStatements(TCompiler *compiler, TIntermBlock *root)
{
TType returnType;
for (TIntermNode *node : *root->getSequence())
{
TIntermFunctionDefinition *definition = node->getAsFunctionDefinition();
if (definition != nullptr && NeedsReturnStatement(definition, &returnType))
{
TIntermBranch *branch = new TIntermBranch(EOpReturn, CreateZeroNode(returnType));
TIntermBlock *bodyNode = definition->getBody();
bodyNode->getSequence()->push_back(branch);
}
}
return compiler->validateAST(root);
}
} // namespace sh
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