WASM: NFC. Rename WasmReinterpret into WasmNoOpCast.

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/BodyGenerator.kt

@@ -505,7 +505,7 @@ class BodyGenerator(val context: WasmFunctionCodegenContext) : IrElementVisitorV
 
     // Return true if function is recognized as intrinsic.
     fun tryToGenerateWasmOpIntrinsicCall(call: IrFunctionAccessExpression, function: IrFunction): Boolean {
-        if (function.hasWasmReinterpretAnnotation()) {
+        if (function.hasWasmNoOpCastAnnotation()) {
             return true
         }
 

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/DeclarationGenerator.kt

@@ -55,7 +55,7 @@ class DeclarationGenerator(val context: WasmModuleCodegenContext) : IrElementVis
             declaration.getWasmImportAnnotation()
         }
 
-        val isIntrinsic = declaration.hasWasmReinterpretAnnotation() || declaration.getWasmOpAnnotation() != null
+        val isIntrinsic = declaration.hasWasmNoOpCastAnnotation() || declaration.getWasmOpAnnotation() != null
         if (isIntrinsic) {
             return
         }

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/utils/Annotations.kt

@@ -23,8 +23,8 @@ fun IrAnnotationContainer.hasExcludedFromCodegenAnnotation(): Boolean =
 fun IrAnnotationContainer.getWasmOpAnnotation(): String? =
     getAnnotation(FqName("kotlin.wasm.internal.WasmOp"))?.getSingleConstStringArgument()
 
-fun IrAnnotationContainer.hasWasmReinterpretAnnotation(): Boolean =
-    hasAnnotation(FqName("kotlin.wasm.internal.WasmReinterpret"))
+fun IrAnnotationContainer.hasWasmNoOpCastAnnotation(): Boolean =
+    hasAnnotation(FqName("kotlin.wasm.internal.WasmNoOpCast"))
 
 fun IrAnnotationContainer.hasWasmForeignAnnotation(): Boolean =
     hasAnnotation(FqName("kotlin.wasm.internal.WasmForeign"))

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).