From d4f4d9b7c691a1ce8c887745b35080f5b2e0424a Mon Sep 17 00:00:00 2001
From: Volker Berlin <volker.berlin@googlemail.com>
Date: Sun, 29 Mar 2020 21:33:30 +0200
Subject: [PATCH] Reuse the temp variable of a DUP operation for further DUP
 operations

---
 .../module/WasmDupInstruction.java            | 93 -------------------
 1 file changed, 93 deletions(-)
 delete mode 100644 src/de/inetsoftware/jwebassembly/module/WasmDupInstruction.java

diff --git a/src/de/inetsoftware/jwebassembly/module/WasmDupInstruction.java b/src/de/inetsoftware/jwebassembly/module/WasmDupInstruction.java
deleted file mode 100644
index 80b1927..0000000
--- a/src/de/inetsoftware/jwebassembly/module/WasmDupInstruction.java
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
-   Copyright 2019 Volker Berlin (i-net software)
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-
-*/
-package de.inetsoftware.jwebassembly.module;
-
-import java.io.IOException;
-
-import javax.annotation.Nonnull;
-
-import de.inetsoftware.jwebassembly.wasm.AnyType;
-import de.inetsoftware.jwebassembly.wasm.VariableOperator;
-
-/**
- * WasmInstruction that emulate the Java dup instruction which duplicate the value on the stack.
- * 
- * @author Volker Berlin
- *
- */
-class WasmDupInstruction extends WasmInstruction {
-
-    private int                   idx;
-
-    private AnyType               type;
-
-    private LocaleVariableManager localVariables;
-
-    /**
-     * Create an instance of a dup instruction
-     * 
-     * @param idx
-     *            the memory/slot idx of the temp variable
-     * @param type
-     *            the type of the duplicate value
-     * @param localVariables
-     *            the manager for local variables
-     * @param javaCodePos
-     *            the code position/offset in the Java method
-     * @param lineNumber
-     *            the line number in the Java source code
-     */
-    WasmDupInstruction( int idx, AnyType type, LocaleVariableManager localVariables, int javaCodePos, int lineNumber ) {
-        super( javaCodePos, lineNumber );
-        this.idx = idx;
-        this.type = type;
-        this.localVariables = localVariables;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    Type getType() {
-        return Type.Dup;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public void writeTo( @Nonnull ModuleWriter writer ) throws IOException {
-        // save it in a temporary variable and load it 2 times; 
-        int index = localVariables.get( idx, getCodePosition() );
-        writer.writeLocal( VariableOperator.tee, index );
-        writer.writeLocal( VariableOperator.get, index );
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    AnyType getPushValueType() {
-        return type;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    int getPopCount() {
-        return 0;
-    }
-}