translator: escape store information about return on top level

translator/src/main/kotlin/org/kotlinnative/translator/codegens/BlockCodegen.kt

@@ -31,7 +31,6 @@ abstract class BlockCodegen(val state: TranslationState,
 
     val topLevelScopeDepth = 2
     var returnType: LLVMVariable? = null
-    var wasReturnOnTopLevel = false
 
     fun evaluateCodeBlock(expr: PsiElement?,
                           startLabel: LLVMLabel? = null,
@@ -57,7 +56,6 @@ abstract class BlockCodegen(val state: TranslationState,
                 else -> codeBuilder.addAnyReturn(result.type, result.toString())
             }
 
-            wasReturnOnTopLevel = true
         }
         codeBuilder.addUnconditionalJump(nextIterationLabel ?: return)
     }
@@ -1104,9 +1102,7 @@ abstract class BlockCodegen(val state: TranslationState,
                 codeBuilder.addReturnOperator(retNativeValue)
             }
         }
-        if (scopeDepth == topLevelScopeDepth + 2) {
-            wasReturnOnTopLevel = true
-        }
+
         return null
     }
 

translator/src/main/kotlin/org/kotlinnative/translator/codegens/FunctionCodegen.kt

@@ -80,9 +80,9 @@ class FunctionCodegen(state: TranslationState,
         generateLoadArguments()
         evaluateCodeBlock(function.bodyExpression, scopeDepth = topLevelScopeDepth, isBlock = function.hasBlockBody())
 
-        if (!wasReturnOnTopLevel)
-            codeBuilder.addAnyReturn(returnType!!.type)
-
+        if (returnType?.type is LLVMVoidType){
+            codeBuilder.addAnyReturn(LLVMVoidType())
+        }
         codeBuilder.addEndExpression()
     }
 

translator/src/main/kotlin/org/kotlinnative/translator/llvm/LLVMBuilder.kt

@@ -44,7 +44,7 @@ class LLVMBuilder(arm: Boolean = false) {
             addLLVMCodeToLocalPlace("{")
 
     fun addEndExpression() =
-            addLLVMCodeToLocalPlace("}")
+            addLLVMCodeToLocalPlace("unreachable\n}")
 
     fun addAssignment(lhs: LLVMVariable, rhs: LLVMNode) =
             addLLVMCodeToLocalPlace("$lhs = $rhs")