Extract Function: Support implicit abnormal exits via Nothing-typed expressions

compiler/frontend/src/org/jetbrains/kotlin/cfg/pseudocode/Pseudocode.kt

@@ -39,6 +39,8 @@ interface Pseudocode {
 
     val exitInstruction: SubroutineExitInstruction
 
+    val errorInstruction: SubroutineExitInstruction
+
     val sinkInstruction: SubroutineSinkInstruction
 
     val enterInstruction: SubroutineEnterInstruction

compiler/frontend/src/org/jetbrains/kotlin/cfg/pseudocode/PseudocodeImpl.kt

@@ -71,7 +71,7 @@ class PseudocodeImpl(override val correspondingElement: KtElement) : Pseudocode
 
     private var internalErrorInstruction: SubroutineExitInstruction? = null
 
-    private val errorInstruction: SubroutineExitInstruction
+    override val errorInstruction: SubroutineExitInstruction
         get() = internalErrorInstruction ?: throw AssertionError("Error instruction is read before initialization")
 
     private var postPrecessed = false

compiler/frontend/src/org/jetbrains/kotlin/cfg/pseudocode/pseudocodeUtils.kt

@@ -18,9 +18,11 @@ package org.jetbrains.kotlin.cfg.pseudocode
 
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.cfg.Label
 import org.jetbrains.kotlin.cfg.pseudocode.instructions.Instruction
 import org.jetbrains.kotlin.cfg.pseudocode.instructions.eval.*
 import org.jetbrains.kotlin.cfg.pseudocode.instructions.eval.MagicKind.*
+import org.jetbrains.kotlin.cfg.pseudocode.instructions.jumps.AbstractJumpInstruction
 import org.jetbrains.kotlin.cfg.pseudocode.instructions.jumps.ConditionalJumpInstruction
 import org.jetbrains.kotlin.cfg.pseudocode.instructions.jumps.ReturnValueInstruction
 import org.jetbrains.kotlin.cfg.pseudocode.instructions.jumps.ThrowExceptionInstruction
@@ -307,4 +309,7 @@ fun Pseudocode.getPseudocodeByElement(element: KtElement): Pseudocode? {
 
     localDeclarations.forEach { decl -> decl.body.getPseudocodeByElement(element)?.let { return it } }
     return null
-}
+}
+
+val Label.isJumpToError: Boolean
+    get() = resolveToInstruction() == pseudocode.errorInstruction