1 files changed, 78 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/SeparateDeclarations.cpp b/gfx/angle/src/compiler/translator/SeparateDeclarations.cpp
new file mode 100755
index 000000000..4d3835370
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/SeparateDeclarations.cpp
@@ -0,0 +1,78 @@
+//
+// Copyright (c) 2002-2015 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.
+//
+// The SeparateDeclarations function processes declarations, so that in the end each declaration
+// contains only one declarator.
+// This is useful as an intermediate step when initialization needs to be separated from declaration,
+// or when things need to be unfolded out of the initializer.
+// Example:
+//     int a[1] = int[1](1), b[1] = int[1](2);
+// gets transformed when run through this class into the AST equivalent of:
+//     int a[1] = int[1](1);
+//     int b[1] = int[1](2);
+
+#include "compiler/translator/SeparateDeclarations.h"
+
+#include "compiler/translator/IntermNode.h"
+
+namespace sh
+{
+
+namespace
+{
+
+class SeparateDeclarationsTraverser : private TIntermTraverser
+{
+  public:
+    static void apply(TIntermNode *root);
+  private:
+    SeparateDeclarationsTraverser();
+    bool visitDeclaration(Visit, TIntermDeclaration *node) override;
+};
+
+void SeparateDeclarationsTraverser::apply(TIntermNode *root)
+{
+    SeparateDeclarationsTraverser separateDecl;
+    root->traverse(&separateDecl);
+    separateDecl.updateTree();
+}
+
+SeparateDeclarationsTraverser::SeparateDeclarationsTraverser()
+    : TIntermTraverser(true, false, false)
+{
+}
+
+bool SeparateDeclarationsTraverser::visitDeclaration(Visit, TIntermDeclaration *node)
+{
+    TIntermSequence *sequence = node->getSequence();
+    if (sequence->size() > 1)
+    {
+        TIntermBlock *parentBlock = getParentNode()->getAsBlock();
+        ASSERT(parentBlock != nullptr);
+
+        TIntermSequence replacementDeclarations;
+        for (size_t ii = 0; ii < sequence->size(); ++ii)
+        {
+            TIntermDeclaration *replacementDeclaration = new TIntermDeclaration();
+
+            replacementDeclaration->appendDeclarator(sequence->at(ii)->getAsTyped());
+            replacementDeclaration->setLine(sequence->at(ii)->getLine());
+            replacementDeclarations.push_back(replacementDeclaration);
+        }
+
+        mMultiReplacements.push_back(
+            NodeReplaceWithMultipleEntry(parentBlock, node, replacementDeclarations));
+    }
+    return false;
+}
+
+} // namespace
+
+void SeparateDeclarations(TIntermNode *root)
+{
+    SeparateDeclarationsTraverser::apply(root);
+}
+
+}  // namespace sh