FIR: implement trivial typing for break & continue

compiler/fir/tree/src/org/jetbrains/kotlin/fir/expressions/impl/FirAbstractLoopJump.kt

@@ -6,15 +6,18 @@
 package org.jetbrains.kotlin.fir.expressions.impl
 
 import com.intellij.psi.PsiElement
-import org.jetbrains.kotlin.fir.FirAbstractElement
 import org.jetbrains.kotlin.fir.FirSession
 import org.jetbrains.kotlin.fir.FirTarget
 import org.jetbrains.kotlin.fir.expressions.FirJump
 import org.jetbrains.kotlin.fir.expressions.FirLoop
+import org.jetbrains.kotlin.fir.types.FirTypeRef
+import org.jetbrains.kotlin.fir.types.impl.FirImplicitNothingTypeRef
 
 abstract class FirAbstractLoopJump(
     session: FirSession,
     psi: PsiElement?
 ) : FirAbstractExpression(session, psi), FirJump<FirLoop> {
     override lateinit var target: FirTarget<FirLoop>
+
+    override var typeRef: FirTypeRef = FirImplicitNothingTypeRef(session, psi)
 }

compiler/testData/ir/irText/expressions/badBreakContinue.fir.txt

@@ -7,7 +7,7 @@ FILE fqName:<root> fileName:/badBreakContinue.kt
     BLOCK_BODY
       WHILE label=L1 origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           ERROR_EXPR 'Unbound loop: break@@@[ERROR_EXPR(Cannot bind label ERROR to a loop)] ' type=kotlin.Nothing
           ERROR_EXPR 'Unbound loop: continue@@@[ERROR_EXPR(Cannot bind label ERROR to a loop)] ' type=kotlin.Nothing
   FUN name:test3 visibility:public modality:FINAL <> () returnType:kotlin.Unit
@@ -20,7 +20,7 @@ FILE fqName:<root> fileName:/badBreakContinue.kt
               FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> () returnType:IrErrorType
                 BLOCK_BODY
                   RETURN type=kotlin.Nothing from='local final fun <anonymous> (): IrErrorType declared in <root>.test3'
-                    BLOCK type=IrErrorType origin=null
+                    BLOCK type=kotlin.Nothing origin=null
                       BREAK label=L1 loop.label=L1
                       CONTINUE label=L1 loop.label=L1
               FUNCTION_REFERENCE 'local final fun <anonymous> (): IrErrorType declared in <root>.test3' type=IrErrorType origin=LAMBDA

compiler/testData/ir/irText/expressions/breakContinue.fir.txt

@@ -17,19 +17,19 @@ FILE fqName:<root> fileName:/breakContinue.kt
     BLOCK_BODY
       WHILE label=OUTER origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           WHILE label=INNER origin=WHILE_LOOP
             condition: CONST Boolean type=kotlin.Boolean value=true
-            body: BLOCK type=IrErrorType origin=null
+            body: BLOCK type=kotlin.Nothing origin=null
               BREAK label=INNER loop.label=INNER
               BREAK label=OUTER loop.label=OUTER
           BREAK label=OUTER loop.label=OUTER
       WHILE label=OUTER origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           WHILE label=INNER origin=WHILE_LOOP
             condition: CONST Boolean type=kotlin.Boolean value=true
-            body: BLOCK type=IrErrorType origin=null
+            body: BLOCK type=kotlin.Nothing origin=null
               CONTINUE label=INNER loop.label=INNER
               CONTINUE label=OUTER loop.label=OUTER
           CONTINUE label=OUTER loop.label=OUTER
@@ -37,14 +37,14 @@ FILE fqName:<root> fileName:/breakContinue.kt
     BLOCK_BODY
       WHILE label=L origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           WHILE label=L origin=WHILE_LOOP
             condition: CONST Boolean type=kotlin.Boolean value=true
             body: BREAK label=L loop.label=L
           BREAK label=L loop.label=L
       WHILE label=L origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           WHILE label=L origin=WHILE_LOOP
             condition: CONST Boolean type=kotlin.Boolean value=true
             body: CONTINUE label=L loop.label=L

compiler/testData/ir/irText/expressions/breakContinueInLoopHeader.fir.txt

@@ -45,11 +45,11 @@ FILE fqName:<root> fileName:/breakContinueInLoopHeader.kt
       WHILE label=L origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
         body: BLOCK type=kotlin.Unit origin=null
-          VAR name:<range> type:IrErrorType [val]
-            BLOCK type=IrErrorType origin=ELVIS
+          VAR name:<range> type:kotlin.Nothing [val]
+            BLOCK type=kotlin.Nothing origin=ELVIS
               VAR name:<elvis> type:kotlin.collections.List<kotlin.String>? [val]
                 GET_VAR 'ss: kotlin.collections.List<kotlin.String>? declared in <root>.test3' type=kotlin.collections.List<kotlin.String>? origin=null
-              WHEN type=IrErrorType origin=ELVIS
+              WHEN type=kotlin.Nothing origin=ELVIS
                 BRANCH
                   if: CALL 'public final fun EQEQ (arg0: kotlin.Any?, arg1: kotlin.Any?): kotlin.Boolean declared in kotlin.internal.ir' type=kotlin.Boolean origin=EQEQ
                     arg0: GET_VAR 'val <elvis>: kotlin.collections.List<kotlin.String>? [val] declared in <root>.test3' type=kotlin.collections.List<kotlin.String>? origin=null
@@ -71,11 +71,11 @@ FILE fqName:<root> fileName:/breakContinueInLoopHeader.kt
       WHILE label=L origin=WHILE_LOOP
         condition: CONST Boolean type=kotlin.Boolean value=true
         body: BLOCK type=kotlin.Unit origin=null
-          VAR name:<range> type:IrErrorType [val]
-            BLOCK type=IrErrorType origin=ELVIS
+          VAR name:<range> type:kotlin.Nothing [val]
+            BLOCK type=kotlin.Nothing origin=ELVIS
               VAR name:<elvis> type:kotlin.collections.List<kotlin.String>? [val]
                 GET_VAR 'ss: kotlin.collections.List<kotlin.String>? declared in <root>.test4' type=kotlin.collections.List<kotlin.String>? origin=null
-              WHEN type=IrErrorType origin=ELVIS
+              WHEN type=kotlin.Nothing origin=ELVIS
                 BRANCH
                   if: CALL 'public final fun EQEQ (arg0: kotlin.Any?, arg1: kotlin.Any?): kotlin.Boolean declared in kotlin.internal.ir' type=kotlin.Boolean origin=EQEQ
                     arg0: GET_VAR 'val <elvis>: kotlin.collections.List<kotlin.String>? [val] declared in <root>.test4' type=kotlin.collections.List<kotlin.String>? origin=null

compiler/testData/ir/irText/expressions/forWithBreakContinue.fir.txt

@@ -8,7 +8,7 @@ FILE fqName:<root> fileName:/forWithBreakContinue.kt
         CALL 'public abstract fun iterator (): kotlin.collections.Iterator<E of <uninitialized parent>> declared in kotlin.collections.List' type=kotlin.collections.Iterator<E of <uninitialized parent>> origin=null
       WHILE label=null origin=FOR_LOOP_INNER_WHILE
         condition: CALL 'public abstract fun hasNext (): kotlin.Boolean declared in kotlin.collections.Iterator' type=kotlin.Boolean origin=null
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           VAR name:s type:T of <uninitialized parent> [val]
             CALL 'public abstract fun next (): T of <uninitialized parent> declared in kotlin.collections.Iterator' type=T of <uninitialized parent> origin=null
           BREAK label=null loop.label=null
@@ -21,7 +21,7 @@ FILE fqName:<root> fileName:/forWithBreakContinue.kt
         CALL 'public abstract fun iterator (): kotlin.collections.Iterator<E of <uninitialized parent>> declared in kotlin.collections.List' type=kotlin.collections.Iterator<E of <uninitialized parent>> origin=null
       WHILE label=OUTER origin=FOR_LOOP_INNER_WHILE
         condition: CALL 'public abstract fun hasNext (): kotlin.Boolean declared in kotlin.collections.Iterator' type=kotlin.Boolean origin=null
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           VAR name:s1 type:T of <uninitialized parent> [val]
             CALL 'public abstract fun next (): T of <uninitialized parent> declared in kotlin.collections.Iterator' type=T of <uninitialized parent> origin=null
           VAR name:<range> type:kotlin.collections.List<kotlin.String> [val]
@@ -30,7 +30,7 @@ FILE fqName:<root> fileName:/forWithBreakContinue.kt
             CALL 'public abstract fun iterator (): kotlin.collections.Iterator<E of <uninitialized parent>> declared in kotlin.collections.List' type=kotlin.collections.Iterator<E of <uninitialized parent>> origin=null
           WHILE label=INNER origin=FOR_LOOP_INNER_WHILE
             condition: CALL 'public abstract fun hasNext (): kotlin.Boolean declared in kotlin.collections.Iterator' type=kotlin.Boolean origin=null
-            body: BLOCK type=IrErrorType origin=null
+            body: BLOCK type=kotlin.Nothing origin=null
               VAR name:s2 type:T of <uninitialized parent> [val]
                 CALL 'public abstract fun next (): T of <uninitialized parent> declared in kotlin.collections.Iterator' type=T of <uninitialized parent> origin=null
               BREAK label=OUTER loop.label=OUTER
@@ -46,7 +46,7 @@ FILE fqName:<root> fileName:/forWithBreakContinue.kt
         CALL 'public abstract fun iterator (): kotlin.collections.Iterator<E of <uninitialized parent>> declared in kotlin.collections.List' type=kotlin.collections.Iterator<E of <uninitialized parent>> origin=null
       WHILE label=null origin=FOR_LOOP_INNER_WHILE
         condition: CALL 'public abstract fun hasNext (): kotlin.Boolean declared in kotlin.collections.Iterator' type=kotlin.Boolean origin=null
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           VAR name:s type:T of <uninitialized parent> [val]
             CALL 'public abstract fun next (): T of <uninitialized parent> declared in kotlin.collections.Iterator' type=T of <uninitialized parent> origin=null
           CONTINUE label=null loop.label=null
@@ -59,7 +59,7 @@ FILE fqName:<root> fileName:/forWithBreakContinue.kt
         CALL 'public abstract fun iterator (): kotlin.collections.Iterator<E of <uninitialized parent>> declared in kotlin.collections.List' type=kotlin.collections.Iterator<E of <uninitialized parent>> origin=null
       WHILE label=OUTER origin=FOR_LOOP_INNER_WHILE
         condition: CALL 'public abstract fun hasNext (): kotlin.Boolean declared in kotlin.collections.Iterator' type=kotlin.Boolean origin=null
-        body: BLOCK type=IrErrorType origin=null
+        body: BLOCK type=kotlin.Nothing origin=null
           VAR name:s1 type:T of <uninitialized parent> [val]
             CALL 'public abstract fun next (): T of <uninitialized parent> declared in kotlin.collections.Iterator' type=T of <uninitialized parent> origin=null
           VAR name:<range> type:kotlin.collections.List<kotlin.String> [val]
@@ -68,7 +68,7 @@ FILE fqName:<root> fileName:/forWithBreakContinue.kt
             CALL 'public abstract fun iterator (): kotlin.collections.Iterator<E of <uninitialized parent>> declared in kotlin.collections.List' type=kotlin.collections.Iterator<E of <uninitialized parent>> origin=null
           WHILE label=INNER origin=FOR_LOOP_INNER_WHILE
             condition: CALL 'public abstract fun hasNext (): kotlin.Boolean declared in kotlin.collections.Iterator' type=kotlin.Boolean origin=null
-            body: BLOCK type=IrErrorType origin=null
+            body: BLOCK type=kotlin.Nothing origin=null
               VAR name:s2 type:T of <uninitialized parent> [val]
                 CALL 'public abstract fun next (): T of <uninitialized parent> declared in kotlin.collections.Iterator' type=T of <uninitialized parent> origin=null
               CONTINUE label=OUTER loop.label=OUTER