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8263358: Update java.lang to use instanceof pattern variable

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Reviewed-by: iris, chegar, mchung, dfuchs
This commit is contained in:
Patrick Concannon 2021-03-24 09:57:22 +00:00
parent ae9af57bf6
commit 329697b02e
18 changed files with 63 additions and 112 deletions
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9
src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java
View file

@ -302,8 +302,7 @@ class InvokerBytecodeGenerator {
}
private static String debugString(Object arg) {
if (arg instanceof MethodHandle) {
MethodHandle mh = (MethodHandle) arg;
if (arg instanceof MethodHandle mh) {
MemberName member = mh.internalMemberName();
if (member != null)
return member.toString();
@ -627,8 +626,7 @@ class InvokerBytecodeGenerator {
private void emitReferenceCast(Class<?> cls, Object arg) {
Name writeBack = null; // local to write back result
if (arg instanceof Name) {
Name n = (Name) arg;
if (arg instanceof Name n) {
if (lambdaForm.useCount(n) > 1) {
// This guy gets used more than once.
writeBack = n;
@ -1679,8 +1677,7 @@ class InvokerBytecodeGenerator {
private void emitPushArgument(Class<?> ptype, Object arg) {
BasicType bptype = basicType(ptype);
if (arg instanceof Name) {
Name n = (Name) arg;
if (arg instanceof Name n) {
emitLoadInsn(n.type, n.index());
emitImplicitConversion(n.type, ptype, n);
} else if (arg == null && bptype == L_TYPE) {

15
src/java.base/share/classes/java/lang/invoke/LambdaForm.java
View file

@ -568,8 +568,7 @@ class LambdaForm {
Name n = names[i];
assert(n.index() == i);
for (Object arg : n.arguments) {
if (arg instanceof Name) {
Name n2 = (Name) arg;
if (arg instanceof Name n2) {
int i2 = n2.index;
assert(0 <= i2 && i2 < names.length) : n.debugString() + ": 0 <= i2 && i2 < names.length: 0 <= " + i2 + " < " + names.length;
assert(names[i2] == n2) : Arrays.asList("-1-", i, "-2-", n.debugString(), "-3-", i2, "-4-", n2.debugString(), "-5-", names[i2].debugString(), "-6-", this);
@ -1133,9 +1132,9 @@ class LambdaForm {
public boolean equals(Object other) {
if (this == other) return true;
if (other == null) return false;
if (!(other instanceof NamedFunction)) return false;
NamedFunction that = (NamedFunction) other;
return this.member != null && this.member.equals(that.member);
return (other instanceof NamedFunction that)
&& this.member != null
&& this.member.equals(that.member);
}
@Override
@ -1407,8 +1406,7 @@ class LambdaForm {
boolean replaced = false;
eachArg:
for (int j = 0; j < arguments.length; j++) {
if (arguments[j] instanceof Name) {
Name n = (Name) arguments[j];
if (arguments[j] instanceof Name n) {
int check = n.index;
// harmless check to see if the thing is already in newNames:
if (check >= 0 && check < newNames.length && n == newNames[check])
@ -1435,8 +1433,7 @@ class LambdaForm {
@SuppressWarnings("LocalVariableHidesMemberVariable")
Object[] arguments = this.arguments;
for (int j = 0; j < arguments.length; j++) {
if (arguments[j] instanceof Name) {
Name n = (Name) arguments[j];
if (arguments[j] instanceof Name n) {
if (n.isParam() && n.index < INTERNED_ARGUMENT_LIMIT)
arguments[j] = internArgument(n);
}

6
src/java.base/share/classes/java/lang/invoke/LambdaFormEditor.java
View file

@ -337,9 +337,8 @@ class LambdaFormEditor {
k = m.get(key);
} else if (c == null) {
return null;
} else if (c instanceof Transform) {
} else if (c instanceof Transform t) {
// one-element cache avoids overhead of an array
Transform t = (Transform)c;
if (t.equals(key)) k = t;
} else {
Transform[] ta = (Transform[])c;
@ -389,8 +388,7 @@ class LambdaFormEditor {
return form;
}
Transform[] ta;
if (c instanceof Transform) {
Transform k = (Transform)c;
if (c instanceof Transform k) {
if (k.equals(key)) {
LambdaForm result = k.get();
if (result == null) {

12
src/java.base/share/classes/java/lang/invoke/MemberName.java
View file

@ -147,12 +147,10 @@ final class MemberName implements Member, Cloneable {
// type is not a MethodType yet. Convert it thread-safely.
synchronized (this) {
if (type instanceof String) {
String sig = (String) type;
if (type instanceof String sig) {
MethodType res = MethodType.fromDescriptor(sig, getClassLoader());
type = res;
} else if (type instanceof Object[]) {
Object[] typeInfo = (Object[]) type;
} else if (type instanceof Object[] typeInfo) {
Class<?>[] ptypes = (Class<?>[]) typeInfo[1];
Class<?> rtype = (Class<?>) typeInfo[0];
MethodType res = MethodType.makeImpl(rtype, ptypes, true);
@ -235,8 +233,7 @@ final class MemberName implements Member, Cloneable {
// type is not a Class yet. Convert it thread-safely.
synchronized (this) {
if (type instanceof String) {
String sig = (String) type;
if (type instanceof String sig) {
MethodType mtype = MethodType.fromDescriptor("()"+sig, getClassLoader());
Class<?> res = mtype.returnType();
type = res;
@ -938,8 +935,7 @@ final class MemberName implements Member, Cloneable {
} else {
Module m;
Class<?> plc;
if (from instanceof MethodHandles.Lookup) {
MethodHandles.Lookup lookup = (MethodHandles.Lookup)from;
if (from instanceof MethodHandles.Lookup lookup) {
from = lookup.lookupClass();
m = lookup.lookupClass().getModule();
plc = lookup.previousLookupClass();

3
src/java.base/share/classes/java/lang/invoke/MethodHandles.java
View file

@ -2262,10 +2262,9 @@ public class MethodHandles {
// workaround to read `this_class` using readConst and validate the value
int thisClass = reader.readUnsignedShort(reader.header + 2);
Object constant = reader.readConst(thisClass, new char[reader.getMaxStringLength()]);
if (!(constant instanceof Type)) {
if (!(constant instanceof Type type)) {
throw new ClassFormatError("this_class item: #" + thisClass + " not a CONSTANT_Class_info");
}
Type type = ((Type) constant);
if (!type.getDescriptor().startsWith("L")) {
throw new ClassFormatError("this_class item: #" + thisClass + " not a CONSTANT_Class_info");
}

3
src/java.base/share/classes/java/lang/invoke/VarHandles.java
View file

@ -605,8 +605,7 @@ final class VarHandles {
}
private static void noCheckedExceptions(MethodHandle handle) {
if (handle instanceof DirectMethodHandle) {
DirectMethodHandle directHandle = (DirectMethodHandle)handle;
if (handle instanceof DirectMethodHandle directHandle) {
byte refKind = directHandle.member.getReferenceKind();
MethodHandleInfo info = new InfoFromMemberName(
MethodHandles.Lookup.IMPL_LOOKUP,