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Use the same temporary trace for analyzing all candidate calls

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Otherwise, when completing all the unsuccessfull candiates,
resolution of each lambda-arguments starts repeatedly for each candidate
that leads to exponential time

NB: Changes in `completeArguments` are necessary because otherwise
nested lambdas will be analyzed twice:
once for the main resolved call, and then for all candidates
that again leads to exponential complexity

 #KT-16672 Fixed
 #KT-19457 Fixed
This commit is contained in:
Denis Zharkov
2017-08-30 12:51:29 +03:00
parent 84c2e01161
commit d6fbb084b1
7 changed files with 182 additions and 5 deletions
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compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/CallCompleter.kt
+4 -5
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@@ -20,7 +20,6 @@ import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.builtins.getReturnTypeFromFunctionType
import org.jetbrains.kotlin.builtins.getValueParameterTypesFromFunctionType
import org.jetbrains.kotlin.builtins.isFunctionType
import org.jetbrains.kotlin.config.CompilerConfiguration
import org.jetbrains.kotlin.config.LanguageVersionSettings
import org.jetbrains.kotlin.descriptors.CallableDescriptor
import org.jetbrains.kotlin.psi.*
@@ -75,10 +74,10 @@ class CallCompleter(
// it's completed when the outer (variable as function call) is completed
if (!isInvokeCallOnVariable(context.call)) {
val temporaryTrace = TemporaryBindingTrace.create(context.trace, "Trace to complete a resulting call")
val contextWithTemporaryTrace = context.replaceBindingTrace(temporaryTrace)
completeResolvedCallAndArguments(resolvedCall, results, context.replaceBindingTrace(temporaryTrace), tracing)
completeAllCandidates(context, results)
completeResolvedCallAndArguments(resolvedCall, results, contextWithTemporaryTrace, tracing)
completeAllCandidates(contextWithTemporaryTrace, results)
temporaryTrace.commit()
}
@@ -120,10 +119,10 @@ class CallCompleter(
results.resultingCalls
}) as Collection<MutableResolvedCall<D>>
val temporaryBindingTrace = TemporaryBindingTrace.create(context.trace, "Trace to complete a candidate that is not a resulting call")
candidates.filterNot { resolvedCall -> resolvedCall.isCompleted }.forEach {
resolvedCall ->
val temporaryBindingTrace = TemporaryBindingTrace.create(context.trace, "Trace to complete a candidate that is not a resulting call")
completeResolvedCallAndArguments(resolvedCall, results, context.replaceBindingTrace(temporaryBindingTrace), TracingStrategy.EMPTY)
}
}