diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
index e210fc2608e..773fd97f184 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
@@ -440,7 +440,8 @@ private val nameToOperationConventionOrigin = mutableMapOf(
     OperatorNameConventions.DIV to IrStatementOrigin.DIV,
     OperatorNameConventions.MOD to IrStatementOrigin.PERC,
     OperatorNameConventions.REM to IrStatementOrigin.PERC,
-    OperatorNameConventions.RANGE_TO to IrStatementOrigin.RANGE
+    OperatorNameConventions.RANGE_TO to IrStatementOrigin.RANGE,
+    OperatorNameConventions.CONTAINS to IrStatementOrigin.IN,
 )
 
 internal fun FirReference.statementOrigin(): IrStatementOrigin? {
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inArrayIndices.kt b/compiler/testData/codegen/bytecodeText/ranges/inArrayIndices.kt
index 9b4d50fca9e..eb11afc1855 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inArrayIndices.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inArrayIndices.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun testPrimitiveArray(i: Int, ints: IntArray) = i in ints.indices
 
 fun testObjectArray(i: Int, xs: Array<Any>) = i in xs.indices
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inCharSequenceIndices.kt b/compiler/testData/codegen/bytecodeText/ranges/inCharSequenceIndices.kt
index bc5d07b1267..9c5003f200d 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inCharSequenceIndices.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inCharSequenceIndices.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun testCharSequence(i: Int, cs: CharSequence) = i in cs.indices
 
 fun testLongWithCharSequence(i: Long, cs: CharSequence) = i in cs.indices
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inCollectionIndices.kt b/compiler/testData/codegen/bytecodeText/ranges/inCollectionIndices.kt
index 46bbf35967a..2426d4cf79e 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inCollectionIndices.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inCollectionIndices.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun testCollection(i: Int, xs: List<Any>) = i in xs.indices
 
 fun testLongWithCollection(i: Long, xs: List<Any>) = i in xs.indices
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inComparableRangeLiteral.kt b/compiler/testData/codegen/bytecodeText/ranges/inComparableRangeLiteral.kt
index 67062f63213..bc7e71df6fa 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inComparableRangeLiteral.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inComparableRangeLiteral.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun test1(a: String) = a in "alpha" .. "omega"
 fun test2(a: String) = a !in "alpha" .. "omega"
 fun <T : Comparable<T>> test3(x: T, left: T, right: T) = x in left .. right
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange.kt b/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange.kt
index e90524cd50a..fb5aa71caf3 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun ub_ub(x: UByte, a: UByte, b: UByte) = x in a..b
 fun ub_us(x: UByte, a: UShort, b: UShort) = x in a..b
 fun ub_ui(x: UByte, a: UInt, b: UInt) = x in a..b
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange_2.kt b/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange_2.kt
index e052056574f..b32fe700a70 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange_2.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inMixedUnsignedRange_2.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // ULong in range of UInt, uses non-intrinsic 'contains' for non-IR backend
 
 fun ul_ub(x: ULong, a: UByte, b: UByte) = x in a..b
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inNonMatchingRangeIntrinsified.kt b/compiler/testData/codegen/bytecodeText/ranges/inNonMatchingRangeIntrinsified.kt
index c5bdd13cba1..b5da9fd3862 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inNonMatchingRangeIntrinsified.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inNonMatchingRangeIntrinsified.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun inInt(x: Long): Boolean {
     return x in 1..2
 }
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inOptimizableRange.kt b/compiler/testData/codegen/bytecodeText/ranges/inOptimizableRange.kt
index 820af418e5e..4473c174761 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inOptimizableRange.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inOptimizableRange.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun Byte.inByte(left: Byte, right: Byte) = this in left..right
 
 fun Short.inInt(left: Int, right: Int) = this in left .. right
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inOptimizableUnsignedRange.kt b/compiler/testData/codegen/bytecodeText/ranges/inOptimizableUnsignedRange.kt
index 85a97f54c29..271b06cb0e8 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inOptimizableUnsignedRange.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inOptimizableUnsignedRange.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun testUIntRangeLiteral(a: UInt, b: UInt) = 42u in a .. b
 
 fun testULongRangeLiteral(a: ULong, b: ULong) = 42UL in a .. b
diff --git a/compiler/testData/codegen/bytecodeText/ranges/inUntil.kt b/compiler/testData/codegen/bytecodeText/ranges/inUntil.kt
index 14b43172c1f..06a72214abe 100644
--- a/compiler/testData/codegen/bytecodeText/ranges/inUntil.kt
+++ b/compiler/testData/codegen/bytecodeText/ranges/inUntil.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun testChar(a: Char, x: Char, y: Char) = a in x until y
 
 fun testByte(a: Byte, x: Byte, y: Byte) = a in x until y
diff --git a/compiler/testData/ir/irText/expressions/in.fir.ir.txt b/compiler/testData/ir/irText/expressions/in.fir.ir.txt
index f6ddc9f0852..87c58f465bf 100644
--- a/compiler/testData/ir/irText/expressions/in.fir.ir.txt
+++ b/compiler/testData/ir/irText/expressions/in.fir.ir.txt
@@ -4,7 +4,7 @@ FILE fqName:<root> fileName:/in.kt
     VALUE_PARAMETER name:x index:1 type:kotlin.collections.Collection<kotlin.Any>
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun test1 (a: kotlin.Any, x: kotlin.collections.Collection<kotlin.Any>): kotlin.Boolean declared in <root>'
-        CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=null
+        CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=IN
           $this: GET_VAR 'x: kotlin.collections.Collection<kotlin.Any> declared in <root>.test1' type=kotlin.collections.Collection<kotlin.Any> origin=null
           element: GET_VAR 'a: kotlin.Any declared in <root>.test1' type=kotlin.Any origin=null
   FUN name:test2 visibility:public modality:FINAL <> (a:kotlin.Any, x:kotlin.collections.Collection<kotlin.Any>) returnType:kotlin.Boolean
@@ -13,7 +13,7 @@ FILE fqName:<root> fileName:/in.kt
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun test2 (a: kotlin.Any, x: kotlin.collections.Collection<kotlin.Any>): kotlin.Boolean declared in <root>'
         CALL 'public final fun not (): kotlin.Boolean [operator] declared in kotlin.Boolean' type=kotlin.Boolean origin=null
-          $this: CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=null
+          $this: CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=IN
             $this: GET_VAR 'x: kotlin.collections.Collection<kotlin.Any> declared in <root>.test2' type=kotlin.collections.Collection<kotlin.Any> origin=null
             element: GET_VAR 'a: kotlin.Any declared in <root>.test2' type=kotlin.Any origin=null
   FUN name:test3 visibility:public modality:FINAL <T> (a:T of <root>.test3, x:kotlin.collections.Collection<T of <root>.test3>) returnType:kotlin.Boolean
@@ -22,7 +22,7 @@ FILE fqName:<root> fileName:/in.kt
     VALUE_PARAMETER name:x index:1 type:kotlin.collections.Collection<T of <root>.test3>
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun test3 <T> (a: T of <root>.test3, x: kotlin.collections.Collection<T of <root>.test3>): kotlin.Boolean declared in <root>'
-        CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=null
+        CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=IN
           $this: GET_VAR 'x: kotlin.collections.Collection<T of <root>.test3> declared in <root>.test3' type=kotlin.collections.Collection<T of <root>.test3> origin=null
           element: GET_VAR 'a: T of <root>.test3 declared in <root>.test3' type=T of <root>.test3 origin=null
   FUN name:test4 visibility:public modality:FINAL <T> (a:T of <root>.test4, x:kotlin.collections.Collection<T of <root>.test4>) returnType:kotlin.Boolean
@@ -32,6 +32,6 @@ FILE fqName:<root> fileName:/in.kt
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun test4 <T> (a: T of <root>.test4, x: kotlin.collections.Collection<T of <root>.test4>): kotlin.Boolean declared in <root>'
         CALL 'public final fun not (): kotlin.Boolean [operator] declared in kotlin.Boolean' type=kotlin.Boolean origin=null
-          $this: CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=null
+          $this: CALL 'public abstract fun contains (element: E of kotlin.collections.Collection): kotlin.Boolean [operator] declared in kotlin.collections.Collection' type=kotlin.Boolean origin=IN
             $this: GET_VAR 'x: kotlin.collections.Collection<T of <root>.test4> declared in <root>.test4' type=kotlin.collections.Collection<T of <root>.test4> origin=null
             element: GET_VAR 'a: T of <root>.test4 declared in <root>.test4' type=T of <root>.test4 origin=null
diff --git a/compiler/testData/ir/irText/expressions/when.fir.ir.txt b/compiler/testData/ir/irText/expressions/when.fir.ir.txt
index 8011d00f0d7..a253e1094fe 100644
--- a/compiler/testData/ir/irText/expressions/when.fir.ir.txt
+++ b/compiler/testData/ir/irText/expressions/when.fir.ir.txt
@@ -45,7 +45,7 @@ FILE fqName:<root> fileName:/when.kt
                 GET_VAR 'val tmp_0: kotlin.Any? [val] declared in <root>.testWithSubject' type=kotlin.Any? origin=null
               then: CONST String type=kotlin.String value="!Number"
             BRANCH
-              if: CALL 'public final fun contains <T> (element: T of kotlin.collections.CollectionsKt.contains): kotlin.Boolean [operator] declared in kotlin.collections.CollectionsKt' type=kotlin.Boolean origin=null
+              if: CALL 'public final fun contains <T> (element: T of kotlin.collections.CollectionsKt.contains): kotlin.Boolean [operator] declared in kotlin.collections.CollectionsKt' type=kotlin.Boolean origin=IN
                 <T>: kotlin.Any?
                 $receiver: CALL 'public final fun setOf <T> (): kotlin.collections.Set<T of kotlin.collections.SetsKt.setOf> [inline] declared in kotlin.collections.SetsKt' type=kotlin.collections.Set<kotlin.Nothing> origin=null
                   <T>: kotlin.Nothing
@@ -78,7 +78,7 @@ FILE fqName:<root> fileName:/when.kt
               GET_VAR 'x: kotlin.Any? declared in <root>.test' type=kotlin.Any? origin=null
             then: CONST String type=kotlin.String value="!Number"
           BRANCH
-            if: CALL 'public final fun contains <T> (element: T of kotlin.collections.CollectionsKt.contains): kotlin.Boolean [operator] declared in kotlin.collections.CollectionsKt' type=kotlin.Boolean origin=null
+            if: CALL 'public final fun contains <T> (element: T of kotlin.collections.CollectionsKt.contains): kotlin.Boolean [operator] declared in kotlin.collections.CollectionsKt' type=kotlin.Boolean origin=IN
               <T>: kotlin.Number
               $receiver: CALL 'public final fun setOf <T> (): kotlin.collections.Set<T of kotlin.collections.SetsKt.setOf> [inline] declared in kotlin.collections.SetsKt' type=kotlin.collections.Set<kotlin.Nothing> origin=null
                 <T>: kotlin.Nothing