fix KT-5645: 'continue' inside 'do...while' statement works as goto to the beginning of the loop (not checking loop condition)

#KT-5645 Fixed

compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetControlFlowBuilder.java

@@ -52,6 +52,8 @@ public interface JetControlFlowBuilder {
     Label getEntryPoint(@NotNull JetElement labelElement);
     @NotNull
     Label getExitPoint(@NotNull JetElement labelElement);
+    @NotNull
+    Label getConditionEntryPoint(@NotNull JetElement labelElement);
 
     // Declarations
     void declareParameter(@NotNull JetParameter parameter);

compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetControlFlowBuilderAdapter.java

@@ -183,6 +183,12 @@ public abstract class JetControlFlowBuilderAdapter implements JetControlFlowBuil
         return getDelegateBuilder().getExitPoint(labelElement);
     }
 
+    @NotNull
+    @Override
+    public Label getConditionEntryPoint(@NotNull JetElement labelElement) {
+        return getDelegateBuilder().getConditionEntryPoint(labelElement);
+    }
+
     @Override
     public LoopInfo enterLoop(@NotNull JetExpression expression, @Nullable Label loopExitPoint, Label conditionEntryPoint) {
         return getDelegateBuilder().enterLoop(expression, loopExitPoint, conditionEntryPoint);

compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetControlFlowProcessor.java

@@ -953,7 +953,11 @@ public class JetControlFlowProcessor {
             JetElement loop = getCorrespondingLoop(expression);
             if (loop != null) {
                 checkJumpDoesNotCrossFunctionBoundary(expression, loop);
-                builder.jump(builder.getEntryPoint(loop), expression);
+                if (loop instanceof JetDoWhileExpression) {
+                    builder.jump(builder.getConditionEntryPoint(loop), expression);
+                } else {
+                    builder.jump(builder.getEntryPoint(loop), expression);
+                }
             }
         }
 

compiler/frontend/src/org/jetbrains/jet/lang/cfg/pseudocode/JetControlFlowInstructionsGenerator.java

@@ -200,6 +200,14 @@ public class JetControlFlowInstructionsGenerator extends JetControlFlowBuilderAd
             return elementToBlockInfo.get(labelElement).getEntryPoint();
         }
 
+        @NotNull
+        @Override
+        public Label getConditionEntryPoint(@NotNull JetElement labelElement) {
+            BreakableBlockInfo blockInfo = elementToBlockInfo.get(labelElement);
+            assert blockInfo instanceof LoopInfo : "expected LoopInfo for " + labelElement.getText() ;
+            return ((LoopInfo)blockInfo).getConditionEntryPoint();
+        }
+
         @NotNull
         @Override
         public Label getExitPoint(@NotNull JetElement labelElement) {