diff options
Diffstat (limited to 'src/compiler/scala/tools/nsc/backend/jvm/BCodeIdiomatic.scala')
| -rw-r--r-- | src/compiler/scala/tools/nsc/backend/jvm/BCodeIdiomatic.scala | 110 |
1 files changed, 45 insertions, 65 deletions
diff --git a/src/compiler/scala/tools/nsc/backend/jvm/BCodeIdiomatic.scala b/src/compiler/scala/tools/nsc/backend/jvm/BCodeIdiomatic.scala index eb0da7caef..e3d45a9b3e 100644 --- a/src/compiler/scala/tools/nsc/backend/jvm/BCodeIdiomatic.scala +++ b/src/compiler/scala/tools/nsc/backend/jvm/BCodeIdiomatic.scala @@ -12,6 +12,7 @@ import scala.annotation.switch import scala.collection.mutable import GenBCode._ import scala.tools.asm.tree.MethodInsnNode +import scala.tools.nsc.backend.jvm.BCodeHelpers.TestOp /* * A high-level facade to the ASM API for bytecode generation. @@ -28,9 +29,6 @@ abstract class BCodeIdiomatic extends SubComponent { import coreBTypes._ val classfileVersion: Int = settings.target.value match { - case "jvm-1.5" => asm.Opcodes.V1_5 - case "jvm-1.6" => asm.Opcodes.V1_6 - case "jvm-1.7" => asm.Opcodes.V1_7 case "jvm-1.8" => asm.Opcodes.V1_8 } @@ -42,7 +40,7 @@ abstract class BCodeIdiomatic extends SubComponent { if (emitStackMapFrame) asm.ClassWriter.COMPUTE_FRAMES else 0 ) - val StringBuilderClassName = "scala/collection/mutable/StringBuilder" + lazy val JavaStringBuilderClassName = jlStringBuilderRef.internalName val EMPTY_STRING_ARRAY = Array.empty[String] val EMPTY_INT_ARRAY = Array.empty[Int] @@ -109,41 +107,20 @@ abstract class BCodeIdiomatic extends SubComponent { def jmethod: asm.tree.MethodNode import asm.Opcodes; - import icodes.opcodes.{ Static, Dynamic, SuperCall } final def emit(opc: Int) { jmethod.visitInsn(opc) } - /* - * can-multi-thread - */ - final def genPrimitiveArithmetic(op: icodes.ArithmeticOp, kind: BType) { - - import icodes.{ ADD, SUB, MUL, DIV, REM, NOT } - - op match { - - case ADD => add(kind) - case SUB => sub(kind) - case MUL => mul(kind) - case DIV => div(kind) - case REM => rem(kind) - - case NOT => - if (kind.isIntSizedType) { - emit(Opcodes.ICONST_M1) - emit(Opcodes.IXOR) - } else if (kind == LONG) { - jmethod.visitLdcInsn(new java.lang.Long(-1)) - jmethod.visitInsn(Opcodes.LXOR) - } else { - abort(s"Impossible to negate an $kind") - } - - case _ => - abort(s"Unknown arithmetic primitive $op") + final def genPrimitiveNot(bType: BType): Unit = { + if (bType.isIntSizedType) { + emit(Opcodes.ICONST_M1) + emit(Opcodes.IXOR) + } else if (bType == LONG) { + jmethod.visitLdcInsn(new java.lang.Long(-1)) + jmethod.visitInsn(Opcodes.LXOR) + } else { + abort(s"Impossible to negate a $bType") } - - } // end of method genPrimitiveArithmetic() + } /* * can-multi-thread @@ -207,12 +184,13 @@ abstract class BCodeIdiomatic extends SubComponent { * can-multi-thread */ final def genStartConcat(pos: Position): Unit = { - jmethod.visitTypeInsn(Opcodes.NEW, StringBuilderClassName) + jmethod.visitTypeInsn(Opcodes.NEW, JavaStringBuilderClassName) jmethod.visitInsn(Opcodes.DUP) invokespecial( - StringBuilderClassName, + JavaStringBuilderClassName, INSTANCE_CONSTRUCTOR_NAME, "()V", + itf = false, pos ) } @@ -220,22 +198,27 @@ abstract class BCodeIdiomatic extends SubComponent { /* * can-multi-thread */ - final def genStringConcat(el: BType, pos: Position): Unit = { - - val jtype = - if (el.isArray || el.isClass) ObjectReference - else el - - val bt = MethodBType(List(jtype), StringBuilderReference) - - invokevirtual(StringBuilderClassName, "append", bt.descriptor, pos) + def genConcat(elemType: BType, pos: Position): Unit = { + val paramType = elemType match { + case ct: ClassBType if ct.isSubtypeOf(StringRef).get => StringRef + case ct: ClassBType if ct.isSubtypeOf(jlStringBufferRef).get => jlStringBufferRef + case ct: ClassBType if ct.isSubtypeOf(jlCharSequenceRef).get => jlCharSequenceRef + // Don't match for `ArrayBType(CHAR)`, even though StringBuilder has such an overload: + // `"a" + Array('b')` should NOT be "ab", but "a[C@...". + case _: RefBType => ObjectRef + // jlStringBuilder does not have overloads for byte and short, but we can just use the int version + case BYTE | SHORT => INT + case pt: PrimitiveBType => pt + } + val bt = MethodBType(List(paramType), jlStringBuilderRef) + invokevirtual(JavaStringBuilderClassName, "append", bt.descriptor, pos) } /* * can-multi-thread */ final def genEndConcat(pos: Position): Unit = { - invokevirtual(StringBuilderClassName, "toString", "()Ljava/lang/String;", pos) + invokevirtual(JavaStringBuilderClassName, "toString", "()Ljava/lang/String;", pos) } /* @@ -391,41 +374,38 @@ abstract class BCodeIdiomatic extends SubComponent { final def rem(tk: BType) { emitPrimitive(JCodeMethodN.remOpcodes, tk) } // can-multi-thread // can-multi-thread - final def invokespecial(owner: String, name: String, desc: String, pos: Position) { - addInvoke(Opcodes.INVOKESPECIAL, owner, name, desc, false, pos) + final def invokespecial(owner: String, name: String, desc: String, itf: Boolean, pos: Position): Unit = { + emitInvoke(Opcodes.INVOKESPECIAL, owner, name, desc, itf, pos) } // can-multi-thread - final def invokestatic(owner: String, name: String, desc: String, pos: Position) { - addInvoke(Opcodes.INVOKESTATIC, owner, name, desc, false, pos) + final def invokestatic(owner: String, name: String, desc: String, itf: Boolean, pos: Position): Unit = { + emitInvoke(Opcodes.INVOKESTATIC, owner, name, desc, itf, pos) } // can-multi-thread - final def invokeinterface(owner: String, name: String, desc: String, pos: Position) { - addInvoke(Opcodes.INVOKEINTERFACE, owner, name, desc, true, pos) + final def invokeinterface(owner: String, name: String, desc: String, pos: Position): Unit = { + emitInvoke(Opcodes.INVOKEINTERFACE, owner, name, desc, itf = true, pos) } // can-multi-thread - final def invokevirtual(owner: String, name: String, desc: String, pos: Position) { - addInvoke(Opcodes.INVOKEVIRTUAL, owner, name, desc, false, pos) + final def invokevirtual(owner: String, name: String, desc: String, pos: Position): Unit = { + emitInvoke(Opcodes.INVOKEVIRTUAL, owner, name, desc, itf = false, pos) } - private def addInvoke(opcode: Int, owner: String, name: String, desc: String, itf: Boolean, pos: Position) = { + def emitInvoke(opcode: Int, owner: String, name: String, desc: String, itf: Boolean, pos: Position): Unit = { val node = new MethodInsnNode(opcode, owner, name, desc, itf) jmethod.instructions.add(node) - if (settings.YoptInlinerEnabled) callsitePositions(node) = pos - } - final def invokedynamic(owner: String, name: String, desc: String) { - jmethod.visitMethodInsn(Opcodes.INVOKEDYNAMIC, owner, name, desc) + if (settings.optInlinerEnabled) callsitePositions(node) = pos } // can-multi-thread final def goTo(label: asm.Label) { jmethod.visitJumpInsn(Opcodes.GOTO, label) } // can-multi-thread - final def emitIF(cond: icodes.TestOp, label: asm.Label) { jmethod.visitJumpInsn(cond.opcodeIF, label) } + final def emitIF(cond: TestOp, label: asm.Label) { jmethod.visitJumpInsn(cond.opcodeIF, label) } // can-multi-thread - final def emitIF_ICMP(cond: icodes.TestOp, label: asm.Label) { jmethod.visitJumpInsn(cond.opcodeIFICMP, label) } + final def emitIF_ICMP(cond: TestOp, label: asm.Label) { jmethod.visitJumpInsn(cond.opcodeIFICMP, label) } // can-multi-thread - final def emitIF_ACMP(cond: icodes.TestOp, label: asm.Label) { - assert((cond == icodes.EQ) || (cond == icodes.NE), cond) - val opc = (if (cond == icodes.EQ) Opcodes.IF_ACMPEQ else Opcodes.IF_ACMPNE) + final def emitIF_ACMP(cond: TestOp, label: asm.Label) { + assert((cond == TestOp.EQ) || (cond == TestOp.NE), cond) + val opc = (if (cond == TestOp.EQ) Opcodes.IF_ACMPEQ else Opcodes.IF_ACMPNE) jmethod.visitJumpInsn(opc, label) } // can-multi-thread |