org.jetbrains.kotlin.codegen.pseudoInsns.PseudoInsns.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.codegen.pseudoInsns
import org.jetbrains.org.objectweb.asm.Label
import org.jetbrains.org.objectweb.asm.Opcodes
import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode
import org.jetbrains.org.objectweb.asm.tree.InsnList
import org.jetbrains.org.objectweb.asm.tree.MethodInsnNode
val PSEUDO_INSN_CALL_OWNER: String = "kotlin/jvm/internal/\$PseudoInsn"
enum class PseudoInsn(val signature: String = "()V") {
FIX_STACK_BEFORE_JUMP(),
FAKE_ALWAYS_TRUE_IFEQ("()I"),
FAKE_ALWAYS_FALSE_IFEQ("()I"),
SAVE_STACK_BEFORE_TRY(),
RESTORE_STACK_IN_TRY_CATCH()
;
fun emit(iv: InstructionAdapter) {
iv.invokestatic(PSEUDO_INSN_CALL_OWNER, toString(), signature, false)
}
fun createInsnNode(): MethodInsnNode =
MethodInsnNode(Opcodes.INVOKESTATIC, PSEUDO_INSN_CALL_OWNER, toString(), signature, false)
fun isa(node: AbstractInsnNode): Boolean =
this == parsePseudoInsnOrNull(node)
}
fun isPseudoInsn(insn: AbstractInsnNode): Boolean =
insn is MethodInsnNode && insn.getOpcode() == Opcodes.INVOKESTATIC && insn.owner == PSEUDO_INSN_CALL_OWNER
fun parsePseudoInsnOrNull(insn: AbstractInsnNode): PseudoInsn? =
if (isPseudoInsn(insn))
PseudoInsn.valueOf((insn as MethodInsnNode).name)
else null
fun InstructionAdapter.fixStackAndJump(label: Label) {
PseudoInsn.FIX_STACK_BEFORE_JUMP.emit(this)
this.goTo(label)
}
fun InstructionAdapter.fakeAlwaysTrueIfeq(label: Label) {
PseudoInsn.FAKE_ALWAYS_TRUE_IFEQ.emit(this)
this.ifeq(label)
}
fun InstructionAdapter.fakeAlwaysFalseIfeq(label: Label) {
PseudoInsn.FAKE_ALWAYS_FALSE_IFEQ.emit(this)
this.ifeq(label)
}