[BE] Support until operator in back-ends

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt

@@ -487,6 +487,7 @@ private val nameToOperationConventionOrigin = mutableMapOf(
     OperatorNameConventions.MOD to IrStatementOrigin.PERC,
     OperatorNameConventions.REM to IrStatementOrigin.PERC,
     OperatorNameConventions.RANGE_TO to IrStatementOrigin.RANGE,
+    OperatorNameConventions.RANGE_UNTIL to IrStatementOrigin.RANGE_UNTIL,
     OperatorNameConventions.CONTAINS to IrStatementOrigin.IN,
 )
 

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/IrBuiltInsOverFir.kt

@@ -126,6 +126,7 @@ class IrBuiltInsOverFir(
         createMemberFunction(OperatorNameConventions.MINUS, intType, "other" to charType, isOperator = true)
         val charRange = referenceClassByClassId(StandardClassIds.CharRange)!!.owner.defaultType
         createMemberFunction(OperatorNameConventions.RANGE_TO, charRange, "other" to charType, isIntrinsicConst = false)
+        createMemberFunction(OperatorNameConventions.RANGE_UNTIL, charRange, "other" to charType, isIntrinsicConst = false)
         createIntrinsicConstOfToStringAndEquals()
         finalizeClassDefinition()
     }

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -32671,6 +32671,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/operatorConventions/remOverModOperation.kt");
         }
 
+        @Test
+        @TestMetadata("untilOperator.kt")
+        public void testUntilOperator() throws Exception {
+            runTest("compiler/testData/codegen/box/operatorConventions/untilOperator.kt");
+        }
+
         @Nested
         @TestMetadata("compiler/testData/codegen/box/operatorConventions/compareTo")
         @TestDataPath("$PROJECT_ROOT")