WASM: NFC. Rename WasmReinterpret into WasmNoOpCast.

libraries/stdlib/wasm/builtins/kotlin/Boolean.kt

@@ -60,7 +60,7 @@ public class Boolean private constructor(private val value: Boolean) : Comparabl
         }
     }
 
-    @WasmReinterpret
+    @WasmNoOpCast
     internal fun toInt(): Int =
         implementedAsIntrinsic
 

libraries/stdlib/wasm/builtins/kotlin/Char.kt

@@ -76,7 +76,7 @@ public class Char private constructor(public val value: Char) : Comparable<Char>
         this.toInt().toShort()
 
     /** Returns the value of this character as a `Int`. */
-    @WasmReinterpret
+    @WasmNoOpCast
     public fun toInt(): Int =
         implementedAsIntrinsic
 

libraries/stdlib/wasm/builtins/kotlin/Primitives.kt

@@ -346,7 +346,7 @@ public class Byte private constructor(public val value: Byte) : Number(), Compar
     public override inline fun hashCode(): Int =
         this.toInt()
 
-    @WasmReinterpret
+    @WasmNoOpCast
     @PublishedApi
     internal fun reinterpretAsInt(): Int =
         implementedAsIntrinsic
@@ -686,7 +686,7 @@ public class Short private constructor(public val value: Short) : Number(), Comp
     public override inline fun hashCode(): Int =
         this.toInt()
 
-    @WasmReinterpret
+    @WasmNoOpCast
     @PublishedApi
     internal fun reinterpretAsInt(): Int =
         implementedAsIntrinsic
@@ -1065,23 +1065,23 @@ public class Int private constructor(val value: Int) : Number(), Comparable<Int>
     public override inline fun hashCode(): Int =
         this
 
-    @WasmReinterpret
+    @WasmNoOpCast
     @PublishedApi
     internal fun reinterpretAsBoolean(): Boolean =
         implementedAsIntrinsic
 
     @PublishedApi
-    @WasmReinterpret
+    @WasmNoOpCast
     internal fun reinterpretAsByte(): Byte =
         implementedAsIntrinsic
 
     @PublishedApi
-    @WasmReinterpret
+    @WasmNoOpCast
     internal fun reinterpretAsShort(): Short =
         implementedAsIntrinsic
 
     @PublishedApi
-    @WasmReinterpret
+    @WasmNoOpCast
     internal fun reinterpretAsChar(): Char =
         implementedAsIntrinsic
 }

libraries/stdlib/wasm/internal/kotlin/wasm/internal/Runtime.kt

@@ -33,7 +33,7 @@ internal fun unsafeCharArrayToRawMemory(src: CharArray, dstAddr: Int) {
     }
 }
 
-@WasmReinterpret
+@WasmNoOpCast
 internal fun unsafeNotNull(x: Any?): Any =
     implementedAsIntrinsic
 

libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmAnnotations.kt

@@ -28,9 +28,12 @@ internal annotation class WasmArrayOf(
     val isNullable: Boolean,
 )
 
+// When applied to a function it forces codegen to not generate any code for it.
+// In other words the annotated function will pass it's arguments unchanged.
+// This is used in order to implement type casts when we know that underlying wasm types don't change.
 @Target(AnnotationTarget.FUNCTION)
 @Retention(AnnotationRetention.BINARY)
-internal annotation class WasmReinterpret
+internal annotation class WasmNoOpCast
 
 // This tells backend to insert box/unbox intrinsics around the annotated class. It's used to represent built-in types without making them
 // explicitly "inline" (or "value" in the newest terminology).