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Fix issue in optimization

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This commit is contained in:
Alexey Andreev 2023-07-31 19:29:41 +02:00
parent 2143a103f1
commit 059281a25c
1 changed files with 7 additions and 9 deletions
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16
core/src/main/java/org/teavm/model/optimization/SystemArrayCopyOptimization.java
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@ -27,10 +27,11 @@ public class SystemArrayCopyOptimization implements MethodOptimization {
"arraycopy", Object.class, int.class, Object.class, int.class, int.class, void.class);
private static final MethodReference FAST_ARRAY_COPY_METHOD = new MethodReference(System.class,
"fastArraycopy", Object.class, int.class, Object.class, int.class, int.class, void.class);
private static final ValueType DEFAULT_TYPE = ValueType.object("java.lang.Object");
@Override
public boolean optimize(MethodOptimizationContext context, Program program) {
TypeInference typeInference = null;
var typeInference = new TypeInference(program, context.getMethod().getReference());
var somethingChanged = false;
for (var block : program.getBasicBlocks()) {
for (var instruction : block) {
@ -38,12 +39,9 @@ public class SystemArrayCopyOptimization implements MethodOptimization {
var invoke = (InvokeInstruction) instruction;
var method = invoke.getMethod();
if (method.equals(ARRAY_COPY_METHOD)) {
if (typeInference == null) {
typeInference = new TypeInference(program, context.getMethod().getReference());
}
var sourceType = typeInference.typeOf(invoke.getArguments().get(0));
var destType = typeInference.typeOf(invoke.getArguments().get(2));
if (sourceType != null && destType != null) {
if (sourceType instanceof ValueType.Array && destType instanceof ValueType.Array) {
if (sourceType.equals(destType)
|| context.getHierarchy().isSuperType(destType, sourceType, false)) {
invoke.setMethod(FAST_ARRAY_COPY_METHOD);
@ -65,24 +63,24 @@ public class SystemArrayCopyOptimization implements MethodOptimization {
@Override
public ValueType merge(ValueType a, ValueType b) {
if (!Objects.equals(a, b)) {
return null;
return DEFAULT_TYPE;
}
return a;
}
@Override
public ValueType elementType(ValueType valueType) {
return valueType instanceof ValueType.Array ? ((ValueType.Array) valueType).getItemType() : null;
return valueType instanceof ValueType.Array ? ((ValueType.Array) valueType).getItemType() : DEFAULT_TYPE;
}
@Override
public ValueType nullType() {
return null;
return DEFAULT_TYPE;
}
@Override
public ValueType mapType(ValueType type) {
return type instanceof ValueType.Array ? ((ValueType.Array) type).getItemType() : null;
return type instanceof ValueType.Array ? type : DEFAULT_TYPE;
}
}
}