psi2ir: support dynamic infix calls ('foo bar 42' is 'foo.bar(42)')

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/DynamicCalls.kt

@@ -13,7 +13,7 @@ import org.jetbrains.kotlin.util.OperatorNameConventions
 
 internal fun ResolvedCall<*>.isImplicitInvoke(): Boolean {
     if (resultingDescriptor.name != OperatorNameConventions.INVOKE) return false
-    val callExpression = call.callElement as? KtCallExpression ?: return true
+    val callExpression = call.callElement as? KtCallExpression ?: return false
     val calleeExpression = callExpression.calleeExpression as? KtSimpleNameExpression ?: return true
     return calleeExpression.getReferencedName() != OperatorNameConventions.INVOKE.asString()
 }

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/OperatorExpressionGenerator.kt

@@ -177,14 +177,17 @@ class OperatorExpressionGenerator(statementGenerator: StatementGenerator) : Stat
 
         val kotlinType = context.bindingContext.getType(ktExpression) ?: throw AssertionError("No type for ${ktExpression.text}")
 
+        val startOffset = ktExpression.startOffsetSkippingComments
+        val endOffset = ktExpression.endOffset
+        val irType = kotlinType.toIrType()
+
+        if (ktExpression.operationToken == KtTokens.IDENTIFIER) {
+            return generateCall(getResolvedCall(ktExpression)!!, ktExpression, null)
+        }
+
         val operator = ktExpression.getDynamicOperator()
 
-        return IrDynamicOperatorExpressionImpl(
-            ktExpression.startOffsetSkippingComments,
-            ktExpression.endOffset,
-            kotlinType.toIrType(),
-            operator
-        ).apply {
+        return IrDynamicOperatorExpressionImpl(startOffset, endOffset, irType, operator).apply {
             left = ktLeft.genExpr()
             right = ktRight.genExpr()
         }