private static List<String> makeSetPropertyArgs(ListMultimap<String, String> properties) {
List<String> propertyArgs = Lists.newArrayList();
for (String propertyName : properties.keySet()) {
propertyArgs.add("-setProperty");
StringBuilder nameValues = new StringBuilder(propertyName + "=");
for (String propertyValue : properties.get(propertyName)) {
nameValues.append(propertyValue + ",");
}
propertyArgs.add(nameValues.substring(0, nameValues.length() - 1));
}
return propertyArgs;
}
@Override
public boolean enter(JMethod x, Context ctx) {
if (!x.canBePolymorphic()) {
/*
* Don't prune parameters on unreferenced methods. The methods might not
* be reachable through the current method traversal routines, but might
* be used or checked elsewhere.
*
* Basically, if we never actually checked if the method parameters were
* used or not, don't prune them. Doing so would leave a number of
* dangling JParameterRefs that blow up in later optimizations.
*/
if (!referencedNonTypes.contains(x)) {
return true;
}
/*
* We cannot prune parameters from staticImpls that still have a live
* instance method, because doing so would screw up any subsequent
* devirtualizations. If the instance method has been pruned, then it's
* okay. Also, it's okay on the final pass (saveCodeTypes == false)
* since no more devirtualizations will occur.
*
* TODO: prune params; MakeCallsStatic smarter to account for it.
*/
JMethod instanceMethod = program.instanceMethodForStaticImpl(x);
// Unless the instance method has already been pruned, of course.
if (saveCodeGenTypes
&& instanceMethod != null
&& referencedNonTypes.contains(instanceMethod)) {
// instance method is still live
return true;
}
priorParametersByMethod.putAll(x, x.getParams());
for (int i = 0; i < x.getParams().size(); ++i) {
JParameter param = x.getParams().get(i);
if (!referencedNonTypes.contains(param)) {
x.removeParam(i);
madeChanges();
--i;
}
}
}
return true;
}
// Arguments for pruned parameters will be pushed right into a multiexpression that will be
// evaluated with the next arg, e.g. m(arg1, (prunnedArg2, prunnedArg3, arg4)).
private void maybeReplaceForPrunedParameters(JMethodCall x, Context ctx) {
if (!priorParametersByMethod.containsKey(x.getTarget())) {
// No parameter was pruned.
return;
}
JMethodCall replacementCall = x.cloneWithoutParameters();
assert !x.getTarget().canBePolymorphic();
List<JParameter> originalParams = priorParametersByMethod.get(x.getTarget());
// The method and the call agree in the number of parameters.
assert originalParams.size() == x.getArgs().size();
// Traverse the call arguments left to right.
SourceInfo sourceInfo = x.getSourceInfo();
JMultiExpression unevaluatedArgumentsForPrunedParameters = new JMultiExpression(sourceInfo);
List<JExpression> args = x.getArgs();
for (int currentArgumentIndex = 0;
currentArgumentIndex < args.size();
++currentArgumentIndex) {
JExpression arg = args.get(currentArgumentIndex);
// If the parameter was not pruned .
if (referencedNonTypes.contains(originalParams.get(currentArgumentIndex))) {
// Add the current argument to the list of unevaluated arguments and pass the multi
// expression to the call.
unevaluatedArgumentsForPrunedParameters.addExpressions(arg);
replacementCall.addArg(unevaluatedArgumentsForPrunedParameters);
// Reset the accumulating multi expression.
unevaluatedArgumentsForPrunedParameters = new JMultiExpression(sourceInfo);
} else if (arg.hasSideEffects()) {
// If the argument was pruned and has sideffects accumulate it; otherwise discard.
unevaluatedArgumentsForPrunedParameters.addExpressions(arg);
}
}
if (unevaluatedArgumentsForPrunedParameters.isEmpty()) {
// We are done, all (side effectful) parameters have been evaluated.
ctx.replaceMe(replacementCall);
return;
}
// If the last few parameters where pruned, we need to evaluate the (side effectful) arguments
// for those parameters.
if (replacementCall.getArgs().isEmpty()) {
// All parameters have been pruned, replace by (prunedArg1, ..., prunedArgn, m()).
unevaluatedArgumentsForPrunedParameters.addExpressions(replacementCall);
ctx.replaceMe(unevaluatedArgumentsForPrunedParameters);
return;
}
// Some parameters have been pruned from the end, replace by
// m(arg1,..., (lastArg = lastUnprunedArg, remainingArgs, lastArg))
JExpression lastArg = Iterables.getLast(replacementCall.getArgs());
JLocal tempVar =
createTempLocal(
sourceInfo,
Iterables.getLast(Iterables.filter(originalParams, Predicates.in(referencedNonTypes)))
.getType());
unevaluatedArgumentsForPrunedParameters.addExpressions(
0,
JProgram.createAssignment(
lastArg.getSourceInfo(), new JLocalRef(sourceInfo, tempVar), lastArg));
unevaluatedArgumentsForPrunedParameters.addExpressions(new JLocalRef(sourceInfo, tempVar));
replacementCall.setArg(
replacementCall.getArgs().size() - 1, unevaluatedArgumentsForPrunedParameters);
ctx.replaceMe(replacementCall);
}
