wasm: move common part of wasm expression generator in order to later…

… reuse it with Wasm GC BE

core/src/main/java/org/teavm/backend/wasm/generate/CachedExpression.java

@@ -17,10 +17,9 @@
 
 import org.teavm.backend.wasm.model.expression.WasmExpression;
 
-abstract class CachedExpression {
-    abstract WasmExpression expr();
+public abstract class CachedExpression {
+    public abstract WasmExpression expr();
 
-    void release() {
+    public void release() {
     }
-
 }

core/src/main/java/org/teavm/backend/wasm/generate/ExpressionCache.java

@@ -24,10 +24,10 @@
 import org.teavm.backend.wasm.model.expression.WasmSetLocal;
 import org.teavm.model.TextLocation;
 
-class ExpressionCache {
+public class ExpressionCache {
     private TemporaryVariablePool tmpVars;
 
-    ExpressionCache(TemporaryVariablePool tmpVars) {
+    public ExpressionCache(TemporaryVariablePool tmpVars) {
         this.tmpVars = tmpVars;
     }
 

core/src/main/java/org/teavm/backend/wasm/generate/TemporaryVariablePool.java

@@ -23,15 +23,15 @@
 import org.teavm.backend.wasm.model.WasmLocal;
 import org.teavm.backend.wasm.model.WasmType;
 
-class TemporaryVariablePool {
+public class TemporaryVariablePool {
     private WasmFunction function;
     private Map<WasmType, Deque<WasmLocal>> temporaryVariablesByType = new HashMap<>();
 
-    TemporaryVariablePool(WasmFunction function) {
+    public TemporaryVariablePool(WasmFunction function) {
         this.function = function;
     }
 
-    WasmLocal acquire(WasmType type) {
+    public WasmLocal acquire(WasmType type) {
         var stack = temporaryVariablesByType.computeIfAbsent(type, k -> new ArrayDeque<>());
         WasmLocal variable = stack.pollFirst();
         if (variable == null) {
@@ -41,7 +41,7 @@ WasmLocal acquire(WasmType type) {
         return variable;
     }
 
-    void release(WasmLocal variable) {
+    public void release(WasmLocal variable) {
         var stack = temporaryVariablesByType.get(variable.getType());
         stack.push(variable);
     }

core/src/main/java/org/teavm/backend/wasm/generate/common/methods/BaseWasmGenerationContext.java

@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2024 Alexey Andreev.
+ *
+ *  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 org.teavm.backend.wasm.generate.common.methods;
+
+import java.util.List;
+import org.teavm.backend.wasm.WasmFunctionRepository;
+import org.teavm.backend.wasm.WasmFunctionTypes;
+import org.teavm.backend.wasm.model.WasmTag;
+import org.teavm.model.ClassReaderSource;
+import org.teavm.model.ValueType;
+import org.teavm.model.lowlevel.CallSiteDescriptor;
+import org.teavm.model.lowlevel.Characteristics;
+
+public interface BaseWasmGenerationContext {
+    Characteristics characteristics();
+
+    WasmFunctionRepository functions();
+
+    WasmFunctionTypes functionTypes();
+
+    BaseWasmTypeMapper typeMapper();
+
+    WasmTag getExceptionTag();
+
+    ClassReaderSource classSource();
+
+    List<CallSiteDescriptor> callSites();
+}