C backend: make more tests pass

classlib/src/main/java/org/teavm/classlib/java/lang/TClass.java

@@ -41,6 +41,7 @@ import org.teavm.classlib.java.lang.reflect.TModifier;
 import org.teavm.dependency.PluggableDependency;
 import org.teavm.interop.Address;
 import org.teavm.interop.DelegateTo;
+import org.teavm.interop.Unmanaged;
 import org.teavm.jso.core.JSArray;
 import org.teavm.platform.Platform;
 import org.teavm.platform.PlatformClass;
@@ -82,14 +83,26 @@ public class TClass<T> extends TObject implements TAnnotatedElement {
         return platformClass;
     }
 
+    @DelegateTo("isInstanceLowLevel")
     public boolean isInstance(TObject obj) {
         return Platform.isInstance(Platform.getPlatformObject(obj), platformClass);
     }
 
+    @Unmanaged
+    private boolean isInstanceLowLevel(RuntimeObject obj) {
+        return obj != null && isAssignableFromLowLevel(RuntimeClass.getClass(obj));
+    }
+
+    @DelegateTo("isAssignableFromLowLevel")
     public boolean isAssignableFrom(TClass<?> obj) {
         return Platform.isAssignable(obj.getPlatformClass(), platformClass);
     }
 
+    @Unmanaged
+    private boolean isAssignableFromLowLevel(RuntimeClass other) {
+        return Address.ofObject(this).<RuntimeClass>toStructure().isSupertypeOf.apply(other);
+    }
+
     @DelegateTo("getNameLowLevel")
     public TString getName() {
         if (name == null) {
@@ -98,6 +111,7 @@ public class TClass<T> extends TObject implements TAnnotatedElement {
         return name;
     }
 
+    @Unmanaged
     private RuntimeObject getNameLowLevel() {
         RuntimeClass runtimeClass = Address.ofObject(this).toStructure();
         return runtimeClass.name;

core/src/main/java/org/teavm/ast/optimization/Optimizer.java

@@ -22,6 +22,7 @@ import org.teavm.ast.RegularMethodNode;
 import org.teavm.common.Graph;
 import org.teavm.model.BasicBlock;
 import org.teavm.model.Instruction;
+import org.teavm.model.MethodReference;
 import org.teavm.model.Program;
 import org.teavm.model.Variable;
 import org.teavm.model.util.AsyncProgramSplitter;
@@ -40,6 +41,8 @@ public class Optimizer {
     public void optimize(RegularMethodNode method, Program program, boolean friendlyToDebugger) {
         ReadWriteStatsBuilder stats = new ReadWriteStatsBuilder(method.getVariables().size());
         stats.analyze(program);
+        applyParametersToWriteStats(stats, method.getReference());
+
         boolean[] preservedVars = new boolean[stats.writes.length];
         BreakEliminator breakEliminator = new BreakEliminator();
         breakEliminator.eliminate(method.getBody());
@@ -72,6 +75,7 @@ public class Optimizer {
             boolean[] preservedVars = new boolean[method.getVariables().size()];
             ReadWriteStatsBuilder stats = new ReadWriteStatsBuilder(method.getVariables().size());
             stats.analyze(splitter.getProgram(i));
+            applyParametersToWriteStats(stats, method.getReference());
 
             AsyncMethodPart part = method.getBody().get(i);
             BreakEliminator breakEliminator = new BreakEliminator();
@@ -101,6 +105,12 @@ public class Optimizer {
         }
     }
 
+    private void applyParametersToWriteStats(ReadWriteStatsBuilder stats, MethodReference method) {
+        for (int i = 0; i <= method.parameterCount(); ++i) {
+            stats.writes[i]++;
+        }
+    }
+
     private void findEscapingLiveVars(LivenessAnalyzer liveness, Graph cfg, AsyncProgramSplitter splitter,
             int partIndex, boolean[] output) {
         Program originalProgram = splitter.getOriginalProgram();

core/src/main/java/org/teavm/ast/optimization/OptimizingVisitor.java

@@ -68,6 +68,7 @@ class OptimizingVisitor implements StatementVisitor, ExprVisitor {
     Statement resultStmt;
     private final boolean[] preservedVars;
     private final int[] writeFrequencies;
+    private final int[] initialWriteFrequences;
     private final int[] readFrequencies;
     private final Object[] constants;
     private List<Statement> resultSequence;
@@ -80,6 +81,7 @@ class OptimizingVisitor implements StatementVisitor, ExprVisitor {
             boolean friendlyToDebugger) {
         this.preservedVars = preservedVars;
         this.writeFrequencies = writeFrequencies;
+        this.initialWriteFrequences = writeFrequencies.clone();
         this.readFrequencies = readFrequencies;
         this.constants = constants;
         this.friendlyToDebugger = friendlyToDebugger;
@@ -276,7 +278,7 @@ class OptimizingVisitor implements StatementVisitor, ExprVisitor {
                 return;
             }
 
-            if (constants[index] != null) {
+            if (!preservedVars[index] && initialWriteFrequences[index] == 1 && constants[index] != null) {
                 ConstantExpr constantExpr = new ConstantExpr();
                 constantExpr.setValue(constants[index]);
                 constantExpr.setLocation(expr.getLocation());
@@ -555,7 +557,8 @@ class OptimizingVisitor implements StatementVisitor, ExprVisitor {
                     left = resultExpr;
                 } else {
                     int varIndex = ((VariableExpr) statement.getLeftValue()).getIndex();
-                    if (writeFrequencies[varIndex] == 1 && constants[varIndex] != null) {
+                    if (!preservedVars[varIndex] && initialWriteFrequences[varIndex] == 1
+                            && constants[varIndex] != null) {
                         resultStmt = new SequentialStatement();
                         return;
                     }

core/src/main/java/org/teavm/backend/c/CTarget.java

@@ -422,4 +422,9 @@ public class CTarget implements TeaVMTarget {
     public String[] getPlatformTags() {
         return new String[] { PlatformMarkers.C, PlatformMarkers.LOW_LEVEL };
     }
+
+    @Override
+    public boolean isAsyncSupported() {
+        return false;
+    }
 }

core/src/main/java/org/teavm/backend/c/generate/StringPoolGenerator.java

@@ -71,6 +71,12 @@ public class StringPoolGenerator {
         for (int j = 0; j < string.length(); ++j) {
             char c = string.charAt(j);
             switch (c) {
+                case '\\':
+                    writer.print("\\\\");
+                    break;
+                case '"':
+                    writer.print("\\\"");
+                    break;
                 case '\r':
                     writer.print("\\r");
                     break;
@@ -81,7 +87,9 @@ public class StringPoolGenerator {
                     writer.print("\\t");
                     break;
                 default:
-                    if (c < 32 || c > 127) {
+                    if (c < 32) {
+                        writer.print("\\x" + Character.forDigit(c >> 4, 16) + Character.forDigit(c & 0xF, 16));
+                    } else if (c > 127) {
                         writer.print("\\u"
                                 + Character.forDigit(c >> 12, 16)
                                 + Character.forDigit((c >> 8) & 15, 16)

core/src/main/java/org/teavm/backend/c/intrinsic/PlatformIntrinsic.java

@@ -30,6 +30,7 @@ public class PlatformIntrinsic implements Intrinsic {
         switch (method.getName()) {
             case "getPlatformObject":
             case "asJavaClass":
+            case "createQueue":
                 return true;
         }
         return false;
@@ -42,6 +43,9 @@ public class PlatformIntrinsic implements Intrinsic {
             case "asJavaClass":
                 context.emit(invocation.getArguments().get(0));
                 break;
+            case "createQueue":
+                context.writer().print("NULL");
+                break;
         }
     }
 }

core/src/main/java/org/teavm/backend/javascript/JavaScriptTarget.java

@@ -458,4 +458,9 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
     public String[] getPlatformTags() {
         return new String[] { PlatformMarkers.JAVASCRIPT };
     }
+
+    @Override
+    public boolean isAsyncSupported() {
+        return true;
+    }
 }

core/src/main/java/org/teavm/backend/wasm/WasmTarget.java

@@ -749,4 +749,9 @@ public class WasmTarget implements TeaVMTarget, TeaVMWasmHost {
     public String[] getPlatformTags() {
         return new String[] { PlatformMarkers.WEBASSEMBLY, PlatformMarkers.LOW_LEVEL };
     }
+
+    @Override
+    public boolean isAsyncSupported() {
+        return false;
+    }
 }

core/src/main/java/org/teavm/dependency/DependencyAnalyzer.java

@@ -87,6 +87,7 @@ public class DependencyAnalyzer implements DependencyInfo {
     Map<MethodReference, DependencyPlugin> dependencyPlugins = new HashMap<>();
     private boolean completing;
     private Map<String, SuperClassFilter> superClassFilters = new HashMap<>();
+    boolean asyncSupported;
 
     public DependencyAnalyzer(ClassReaderSource classSource, ClassLoader classLoader, ServiceRepository services,
             Diagnostics diagnostics) {
@@ -116,6 +117,10 @@ public class DependencyAnalyzer implements DependencyInfo {
         agent = new DependencyAgent(this);
     }
 
+    public void setAsyncSupported(boolean asyncSupported) {
+        this.asyncSupported = asyncSupported;
+    }
+
     public DependencyAgent getAgent() {
         return agent;
     }

core/src/main/java/org/teavm/dependency/DependencyGraphBuilder.java

@@ -148,20 +148,25 @@ class DependencyGraphBuilder {
         if (method.hasModifier(ElementModifier.SYNCHRONIZED)) {
             List<DependencyNode> syncNodes = new ArrayList<>();
 
-            MethodDependency methodDep = dependencyAnalyzer.linkMethod(
+            MethodDependency methodDep;
+            if (dependencyAnalyzer.asyncSupported) {
+                methodDep = dependencyAnalyzer.linkMethod(
                         new MethodReference(Object.class, "monitorEnter", Object.class, void.class), null);
-            syncNodes.add(methodDep.getVariable(1));
+                syncNodes.add(methodDep.getVariable(1));
-            methodDep.use();
+                methodDep.use();
+            }
 
             methodDep = dependencyAnalyzer.linkMethod(
                     new MethodReference(Object.class, "monitorEnterSync", Object.class, void.class), null);
             syncNodes.add(methodDep.getVariable(1));
             methodDep.use();
 
-            methodDep = dependencyAnalyzer.linkMethod(
+            if (dependencyAnalyzer.asyncSupported) {
-                    new MethodReference(Object.class, "monitorExit", Object.class, void.class), null);
+                methodDep = dependencyAnalyzer.linkMethod(
-            syncNodes.add(methodDep.getVariable(1));
+                        new MethodReference(Object.class, "monitorExit", Object.class, void.class), null);
-            methodDep.use();
+                syncNodes.add(methodDep.getVariable(1));
+                methodDep.use();
+            }
 
             methodDep = dependencyAnalyzer.linkMethod(
                     new MethodReference(Object.class, "monitorExitSync", Object.class, void.class), null);
@@ -696,25 +701,29 @@ class DependencyGraphBuilder {
 
         @Override
         public void monitorEnter(VariableReader objectRef) {
-             MethodDependency methodDep = dependencyAnalyzer.linkMethod(
+            if (dependencyAnalyzer.asyncSupported) {
+                MethodDependency methodDep = dependencyAnalyzer.linkMethod(
                         new MethodReference(Object.class, "monitorEnter", Object.class, void.class), null);
-             nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
+                nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
-             methodDep.use();
+                methodDep.use();
+            }
 
-             methodDep = dependencyAnalyzer.linkMethod(
+            MethodDependency methodDep = dependencyAnalyzer.linkMethod(
                      new MethodReference(Object.class, "monitorEnterSync", Object.class, void.class), null);
-             nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
+            nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
-             methodDep.use();
+            methodDep.use();
         }
 
         @Override
         public void monitorExit(VariableReader objectRef) {
-            MethodDependency methodDep = dependencyAnalyzer.linkMethod(
+            if (dependencyAnalyzer.asyncSupported) {
-                    new MethodReference(Object.class, "monitorExit", Object.class, void.class), null);
+                MethodDependency methodDep = dependencyAnalyzer.linkMethod(
-            nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
+                        new MethodReference(Object.class, "monitorExit", Object.class, void.class), null);
-            methodDep.use();
+                nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
+                methodDep.use();
+            }
 
-            methodDep = dependencyAnalyzer.linkMethod(
+            MethodDependency methodDep = dependencyAnalyzer.linkMethod(
                     new MethodReference(Object.class, "monitorExitSync", Object.class, void.class), null);
             nodes[objectRef.getIndex()].connect(methodDep.getVariable(1));
             methodDep.use();

core/src/main/java/org/teavm/runtime/RuntimeClass.java

@@ -47,6 +47,7 @@ public class RuntimeClass extends RuntimeObject {
     public RuntimeClass parent;
     public Address enumValues;
     public Address layout;
+    public RuntimeObject simpleName;
 
     @Unmanaged
     public static int computeCanary(int size, int tag) {

core/src/main/java/org/teavm/vm/TeaVM.java

@@ -358,6 +358,7 @@ public class TeaVM implements TeaVMHost, ServiceRepository {
             return;
         }
 
+        dependencyAnalyzer.setAsyncSupported(target.isAsyncSupported());
         dependencyAnalyzer.setInterruptor(() -> progressListener.progressReached(0) == TeaVMProgressFeedback.CONTINUE);
         target.contributeDependencies(dependencyAnalyzer);
         dependencyAnalyzer.processDependencies();

core/src/main/java/org/teavm/vm/TeaVMTarget.java

@@ -46,4 +46,6 @@ public interface TeaVMTarget {
     void emit(ListableClassHolderSource classes, BuildTarget buildTarget, String outputName) throws IOException;
 
     String[] getPlatformTags();
+
+    boolean isAsyncSupported();
 }

platform/src/main/java/org/teavm/platform/Platform.java

@@ -234,10 +234,16 @@ public final class Platform {
         return cls.itemType;
     }
 
+    @DelegateTo("getNameLowLevel")
     public static String getName(PlatformClass cls) {
         return cls.getMetadata().getName();
     }
 
+    @Unmanaged
+    private static RuntimeObject getNameLowLevel(RuntimeClass cls) {
+        return cls.name;
+    }
+
     @JSBody(script = "return $rt_global;")
     private static native JSObject getGlobal();
 }