Add the helper classes for abstract interpretation.

Including: - AbsValue.cpp. The abstract representation of a 'value'. - AbsOpStack.cpp. The abstract representation of an operand stack. - AbsOpArray. The abstract representation of an operand array. Issue: eclipse-omr#5488 Signed-off-by: cijie xia <[email protected]>
themaplelab · Nov 16, 2020 · 87b9607 · 87b9607
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diff --git a/compiler/optimizer/CMakeLists.txt b/compiler/optimizer/CMakeLists.txt
@@ -103,4 +103,7 @@ compiler_library(optimizer
 	${CMAKE_CURRENT_LIST_DIR}/ValuePropagationCommon.cpp
 	${CMAKE_CURRENT_LIST_DIR}/TrivialDeadBlockRemover.cpp
 	${CMAKE_CURRENT_LIST_DIR}/FEInliner.cpp
+	${CMAKE_CURRENT_LIST_DIR}/abstractinterpreter/AbsValue.cpp
+	${CMAKE_CURRENT_LIST_DIR}/abstractinterpreter/AbsOpStack.cpp
+	${CMAKE_CURRENT_LIST_DIR}/abstractinterpreter/AbsOpArray.cpp
 )
diff --git a/compiler/optimizer/abstractinterpreter/AbsOpArray.cpp b/compiler/optimizer/abstractinterpreter/AbsOpArray.cpp
@@ -0,0 +1,89 @@
+/*******************************************************************************
+ * Copyright (c) 2020, 2020 IBM Corp. and others
+ *
+ * This program and the accompanying materials are made available under
+ * the terms of the Eclipse Public License 2.0 which accompanies this
+ * distribution and is available at http://eclipse.org/legal/epl-2.0
+ * or the Apache License, Version 2.0 which accompanies this distribution
+ * and is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception [1] and GNU General Public
+ * License, version 2 with the OpenJDK Assembly Exception [2].
+ *
+ * [1] https://www.gnu.org/software/classpath/license.html
+ * [2] http://openjdk.java.net/legal/assembly-exception.html
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
+ *******************************************************************************/
+
+#include "optimizer/abstractinterpreter/AbsOpArray.hpp"
+
+TR::AbsOpArray* TR::AbsOpArray::clone(TR::Region& region) const
+   {
+   TR::AbsOpArray* copy = new (region) TR::AbsOpArray(_container.size(), region);
+   for (size_t i = 0; i < _container.size(); i ++)
+      {
+      copy->_container[i] = _container[i] ? _container[i]->clone(region) : NULL;
+      }
+   return copy;
+   }
+
+void TR::AbsOpArray::merge(const TR::AbsOpArray* other, TR::Region& region)
+   {
+   TR_ASSERT_FATAL(other->size() == size(), "Op Array Size not equal! other:%d vs self:%d\n", other->size(), size());
+
+   for (size_t i = 0; i < size(); i++)
+      {
+      TR::AbsValue *selfValue = at(i);
+      TR::AbsValue *otherValue = other->at(i);
+
+      if (!selfValue && !otherValue) 
+         {
+         continue;
+         }
+      else if (selfValue && otherValue) 
+         {
+         TR::AbsValue* mergedVal = selfValue->merge(otherValue);
+         set(i, mergedVal);
+         } 
+      else if (selfValue) 
+         {
+         set(i, selfValue);
+         } 
+      else
+         {
+         set(i, otherValue->clone(region));
+         }
+      }
+   }
+
+void TR::AbsOpArray::set(uint32_t index, TR::AbsValue *value)
+   {
+   TR_ASSERT_FATAL(index < size(), "Index out of range! Max array size: %d, Index: %d\n", size(), index);
+   _container[index] = value;
+   }
+
+TR::AbsValue* TR::AbsOpArray::at(uint32_t index) const
+   {
+   TR_ASSERT_FATAL(index < size(), "Index out of range! Max array size: %d, Index: %d\n", size(), index);
+   return _container[index]; 
+   }
+
+void TR::AbsOpArray::print(TR::Compilation* comp) const
+   {
+   traceMsg(comp, "Contents of Abstract Local Variable Array:\n");
+   for (size_t i = 0; i < size(); i++)
+      {
+      traceMsg(comp, "A[%d] = ", i);
+      if (!at(i))
+         traceMsg(comp, "Uninitialized");
+      else 
+         at(i)->print(comp);
+
+      traceMsg(comp, "\n");
+      }
+   traceMsg(comp, "\n");
+   }
diff --git a/compiler/optimizer/abstractinterpreter/AbsOpArray.hpp b/compiler/optimizer/abstractinterpreter/AbsOpArray.hpp
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2020, 2020 IBM Corp. and others
+ *
+ * This program and the accompanying materials are made available under
+ * the terms of the Eclipse Public License 2.0 which accompanies this
+ * distribution and is available at http://eclipse.org/legal/epl-2.0
+ * or the Apache License, Version 2.0 which accompanies this distribution
+ * and is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception [1] and GNU General Public
+ * License, version 2 with the OpenJDK Assembly Exception [2].
+ *
+ * [1] https://www.gnu.org/software/classpath/license.html
+ * [2] http://openjdk.java.net/legal/assembly-exception.html
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
+ *******************************************************************************/
+
+#ifndef ABS_OP_ARRAY
+#define ABS_OP_ARRAY
+
+#include "env/Region.hpp"
+#include "optimizer/abstractinterpreter/AbsValue.hpp"
+#include "infra/vector.hpp"
+
+namespace TR {
+
+/**
+.* Abstract representation of the operand array.
+ */
+class AbsOpArray
+   {
+   public:
+
+   AbsOpArray(uint32_t maxArraySize, TR::Region& region) :
+         _container(maxArraySize, NULL, region)
+      {}
+
+   /**
+    * @brief Clone the operand array
+    * 
+    * @param region The memory region where the cloned operand array should be allocated.
+    * @return the cloned operand array
+    */
+   TR::AbsOpArray *clone(TR::Region& region) const;
+
+   /**
+    * @brief Perform an in-place merge with another operand array.
+    *
+    * @param other The operand array to be merged with.
+    */
+   void merge(const TR::AbsOpArray* other, TR::Region& region);
+
+   /**
+    * @brief Get the abstract value at index i.
+    *
+    * @param i the array index
+    * @return the abstract value
+    */
+   TR::AbsValue *at(uint32_t i) const;
+
+   /**
+    * @brief Set the abstract value at index i.
+    *
+    * @param i the array index
+    * @param value the abstract value to be set
+    */
+   void set(uint32_t i, TR::AbsValue* value);
+
+   size_t size() const { return _container.size(); }
+   void print(TR::Compilation* comp) const;
+
+   private:
+   TR::vector<TR::AbsValue*, TR::Region&> _container;
+   };
+
+}
+#endif
diff --git a/compiler/optimizer/abstractinterpreter/AbsOpStack.cpp b/compiler/optimizer/abstractinterpreter/AbsOpStack.cpp
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2020, 2020 IBM Corp. and others
+ *
+ * This program and the accompanying materials are made available under
+ * the terms of the Eclipse Public License 2.0 which accompanies this
+ * distribution and is available at http://eclipse.org/legal/epl-2.0
+ * or the Apache License, Version 2.0 which accompanies this distribution
+ * and is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception [1] and GNU General Public
+ * License, version 2 with the OpenJDK Assembly Exception [2].
+ *
+ * [1] https://www.gnu.org/software/classpath/license.html
+ * [2] http://openjdk.java.net/legal/assembly-exception.html
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
+ *******************************************************************************/
+
+#include "optimizer/abstractinterpreter/AbsOpStack.hpp"
+
+TR::AbsOpStack* TR::AbsOpStack::clone(TR::Region &region) const
+   {
+   TR::AbsOpStack* copy = new (region) TR::AbsOpStack(region);
+   for (size_t i = 0; i < _container.size(); i ++)
+      {
+      copy->_container.push_back(_container[i] ? _container[i]->clone(region) : NULL);
+      }
+   return copy;
+   }
+
+TR::AbsValue* TR::AbsOpStack::pop()
+   {
+   TR_ASSERT_FATAL(size() > 0, "Pop an empty stack!");
+   TR::AbsValue *value = _container.back();
+   _container.pop_back();
+   return value;
+   }
+
+void TR::AbsOpStack::merge(const TR::AbsOpStack* other, TR::Region& region)
+   {
+   TR_ASSERT_FATAL(other->_container.size() == _container.size(), "Stacks have different sizes! other: %d vs self: %d", other->_container.size(), _container.size());
+
+   for (size_t i = 0; i < _container.size(); i ++)
+      {
+      if (_container[i] == NULL)
+         _container[i] = other->_container[i]->clone(region);
+      else
+         _container[i]->merge(other->_container[i]);
+      }
+   }
+
+void TR::AbsOpStack::print(TR::Compilation* comp) const
+   {
+   traceMsg(comp, "Contents of Abstract Operand Stack:\n");
+
+   const size_t stackSize = size();
+
+   if (stackSize == 0)
+      {
+      traceMsg(comp, "<empty>\n\n");
+      return;
+      }
+
+   traceMsg(comp, "<top>\n");
+
+   for (size_t i = 0; i < stackSize; i++) 
+      {
+      TR::AbsValue *value = _container[stackSize - i -1 ];
+      traceMsg(comp, "S[%d] = ", stackSize - i - 1);
+      if (value)
+         value->print(comp);
+      else 
+         traceMsg(comp, "Uninitialized");
+      traceMsg(comp, "\n");
+      }
+
+   traceMsg(comp, "<bottom>\n\n");
+   }
diff --git a/compiler/optimizer/abstractinterpreter/AbsOpStack.hpp b/compiler/optimizer/abstractinterpreter/AbsOpStack.hpp
@@ -0,0 +1,90 @@
+/*******************************************************************************
+ * Copyright (c) 2020, 2020 IBM Corp. and others
+ *
+ * This program and the accompanying materials are made available under
+ * the terms of the Eclipse Public License 2.0 which accompanies this
+ * distribution and is available at http://eclipse.org/legal/epl-2.0
+ * or the Apache License, Version 2.0 which accompanies this distribution
+ * and is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception [1] and GNU General Public
+ * License, version 2 with the OpenJDK Assembly Exception [2].
+ *
+ * [1] https://www.gnu.org/software/classpath/license.html
+ * [2] http://openjdk.java.net/legal/assembly-exception.html
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
+ *******************************************************************************/
+
+#ifndef ABS_OP_STACK_INCL
+#define ABS_OP_STACK_INCL
+
+#include "env/Region.hpp"
+#include "infra/vector.hpp"
+#include "optimizer/abstractinterpreter/AbsValue.hpp"
+
+namespace TR {
+
+/**
+ * Abstract representation of the operand stack.
+ */
+class AbsOpStack
+   {
+   public:
+   explicit AbsOpStack(TR::Region& region) :
+         _container(region)
+      {}
+
+   /**
+    * @brief Clone an operand stack
+    * 
+    * @param region The memory region where the cloned operand stack should be allocated.
+    * @return the cloned operand stack
+    */
+   TR::AbsOpStack* clone(TR::Region& region) const;
+
+   /**
+    * @brief Perform an in-place merge another operand stack.
+    *
+    * @param other the operand stack to be merged with
+    */
+   void merge(const TR::AbsOpStack* other, TR::Region& region);
+
+   /**
+    * @brief Push an abstract value onto the operand stack.
+    *
+    * @param value the value to be pushed
+    */
+   void push(TR::AbsValue* value) { _container.push_back(value); }
+
+   /**
+    * @brief Peek the top value on the operand stack (stack top; not lattice top).
+    * @note the stack must not be empty
+    * 
+    * @return the abstract value
+    */
+   TR::AbsValue* peek() const { TR_ASSERT_FATAL(size() > 0, "Peek an empty stack!"); return _container.back(); }
+
+   /**
+    * @brief Get and pop a value off of the operand stack.
+    * @note the stack must not be empty.
+    * 
+    * @return the abstract value
+    */
+   TR::AbsValue* pop();
+
+   bool empty() const { return _container.empty(); }
+   size_t size() const { return _container.size(); }
+
+   void print(TR::Compilation* comp) const;
+
+   private:
+   TR::vector<TR::AbsValue*, TR::Region&> _container; 
+   };
+
+}
+
+#endif