Refactor extensions for plugin intrinsics entry points

so platform-specific parts won't have unsafe downcasts.

compiler/ir/backend.jvm/codegen/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineIntrinsicsSupport.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.backend.jvm.codegen
 
 import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.intrinsics.SignatureString
 import org.jetbrains.kotlin.backend.jvm.ir.getCallableReferenceOwnerKClassType
 import org.jetbrains.kotlin.backend.jvm.ir.getCallableReferenceTopLevelFlag
@@ -14,14 +13,12 @@ import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.inline.ReifiedTypeInliner
 import org.jetbrains.kotlin.codegen.state.GenerationState
-import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.descriptors.toIrBasedKotlinType
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.classOrNull
-import org.jetbrains.kotlin.ir.types.toKotlinType
 import org.jetbrains.kotlin.ir.util.allParametersCount
 import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.ir.util.fqNameWhenAvailable
@@ -46,6 +43,9 @@ class IrInlineIntrinsicsSupport(
     override val state: GenerationState
         get() = classCodegen.context.state
 
+    private val pluginExtensions = IrGenerationExtension.getInstances(classCodegen.context.state.project)
+        .mapNotNull { it.getPlatformIntrinsicExtension() as? JvmIrIntrinsicExtension }
+
     override fun putClassInstance(v: InstructionAdapter, type: IrType) {
         ExpressionCodegen.generateClassInstance(v, type, classCodegen.typeMapper, wrapPrimitives = false)
     }
@@ -132,16 +132,12 @@ class IrInlineIntrinsicsSupport(
         instructions: InsnList,
         type: IrType,
         asmType: Type
-    ): Int {
-        return IrGenerationExtension.getInstances(classCodegen.context.state.project)
-            .map {
-                it.applyPluginDefinedReifiedOperationMarker(
-                    insn,
-                    instructions,
-                    type,
-                    classCodegen.context
-                )
-            }
-            .maxOrNull() ?: -1
-    }
+    ): Int = pluginExtensions.maxOfOrNull {
+        it.applyPluginDefinedReifiedOperationMarker(
+            insn,
+            instructions,
+            type,
+            classCodegen.context
+        )
+    } ?: -1
 }

compiler/ir/backend.jvm/codegen/src/org/jetbrains/kotlin/backend/jvm/codegen/JvmIrIntrinsicExtension.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.backend.jvm.codegen
+
+import org.jetbrains.kotlin.backend.common.extensions.IrIntrinsicExtension
+import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
+import org.jetbrains.kotlin.backend.jvm.intrinsics.IntrinsicMethod
+import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
+import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.org.objectweb.asm.tree.InsnList
+import org.jetbrains.org.objectweb.asm.tree.MethodInsnNode
+
+interface JvmIrIntrinsicExtension : IrIntrinsicExtension {
+    fun getIntrinsic(symbol: IrFunctionSymbol): IntrinsicMethod?
+
+    fun applyPluginDefinedReifiedOperationMarker(
+        insn: MethodInsnNode,
+        instructions: InsnList,
+        type: IrType,
+        jvmBackendContext: JvmBackendContext,
+    ): Int = -1
+}