class Inliner[BT <: BTypes] extends AnyRef
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Instance Constructors
- new Inliner(btypes: BT)
Type Members
- sealed trait InlineLog extends AnyRef
- final case class InlineLogFail (request: InlineRequest, warning: CannotInlineWarning) extends InlineLog with Product with Serializable
- final case class InlineLogRollback (request: InlineRequest, warnings: List[CannotInlineWarning]) extends InlineLog with Product with Serializable
- final case class InlineLogSuccess (request: InlineRequest, sizeBefore: Int, sizeInlined: Int) extends InlineLog with Product with Serializable
- class UndoLog extends AnyRef
Value Members
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final
def
!=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
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final
def
##(): Int
- Definition Classes
- AnyRef → Any
- def +(other: String): String
- def ->[B](y: B): (Inliner[BT], B)
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final
def
==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- val NoUndoLogging: UndoLog
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def
adaptPostRequestForMainCallsite(post: InlineRequest, mainCallsite: Callsite): List[InlineRequest]
Given an InlineRequest(mainCallsite, post = List(postCallsite)), the postCallsite is a callsite in the method
mainCallsite.callee.Given an InlineRequest(mainCallsite, post = List(postCallsite)), the postCallsite is a callsite in the method
mainCallsite.callee. Once the mainCallsite is inlined into the target method (mainCallsite.callsiteMethod), we need to find the cloned callsite that corresponds to the postCallsite so we can inline that into the target method as well.However, it is possible that there is no cloned callsite at all that corresponds to the postCallsite, for example if the corresponding callsite already inlined. Example:
def a() = 1 def b() = a() + 2 def c() = b() + 3 def d() = c() + 4
We have the following callsite objects in the call graph:
c1 = a() in b c2 = b() in c c3 = c() in d
Assume we have the following inline request r = InlineRequest(c3, post = List(InlineRequest(c2, post = List(InlineRequest(c1, post = Nil)))))
But before inlining r, assume a separate InlineRequest(c2, post = Nil) is inlined first. We get
c1' = a() in c // added to the call graph c1.inlinedClones += (c1' at c2) // remember that c1' was created when inlining c2 ~c2~ // c2 is removed from the call graph
If we now inline r, we first inline c3. We get
c1 = a() in d // added to call graph c1'.inlinedClones += (c1 at c3) // remember that c1 was created when inlining c3 ~c3~
Now we continue with the post-requests for r, i.e. c2.
- we try to find the clone of c2 that was created when inlining c3 - but there is none. c2 was already inlined before
- we continue with the post-request of c2: c1
- we search for the callsite of c1 that was cloned when inlining c2, we find c1'
- recursively we search for the callsite of c1' that was cloned when inlining c3, we find c1
- so we create an inline request for c1
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final
def
asInstanceOf[T0]: T0
- Definition Classes
- Any
- val btypes: BT
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def
canInlineCallsite(callsite: Callsite): Option[(CannotInlineWarning, List[AbstractInsnNode])]
Check whether the body of the callee contains any instructions that prevent the callsite from being inlined.
Check whether the body of the callee contains any instructions that prevent the callsite from being inlined. See also method
earlyCanInlineCheck.The result of this check depends on changes to the callee method's body. For example, if the callee initially invokes a private method, it cannot be inlined into a different class. If the private method is inlined into the callee, inlining the callee becomes possible. Therefore we don't query it while traversing the call graph and selecting callsites to inline - it might rule out callsites that can be inlined just fine.
Returns
Noneif the callsite can be inlinedSome((message, Nil))if there was an issue performing the access checks, for example because of a missing classfileSome((message, instructions))if inlininginstructionsinto the callsite method would cause an IllegalAccessError
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def
classIsAccessible(accessed: BT.BType, from: BT.ClassBType): Either[OptimizerWarning, Boolean]
Check if a type is accessible to some class, as defined in JVMS 5.4.4.
Check if a type is accessible to some class, as defined in JVMS 5.4.4. (A1) C is public (A2) C and D are members of the same run-time package
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def
clone(): AnyRef
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
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def
earlyCanInlineCheck(callsite: Callsite): Option[CannotInlineWarning]
Check whether an inlining can be performed.
Check whether an inlining can be performed. This method performs tests that don't change even if the body of the callee is changed by the inliner / optimizer, so it can be used early (when looking at the call graph and collecting inline requests for the program).
The tests that inspect the callee's instructions are implemented in method
canInlineBody, which is queried when performing an inline.- returns
Some(message)if inlining cannot be performed,Noneotherwise
- def ensuring(cond: (Inliner[BT]) ⇒ Boolean, msg: ⇒ Any): Inliner[BT]
- def ensuring(cond: (Inliner[BT]) ⇒ Boolean): Inliner[BT]
- def ensuring(cond: Boolean, msg: ⇒ Any): Inliner[BT]
- def ensuring(cond: Boolean): Inliner[BT]
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final
def
eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
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def
equals(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
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def
finalize(): Unit
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( classOf[java.lang.Throwable] )
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def
findIllegalAccess(instructions: InsnList, calleeDeclarationClass: BT.ClassBType, destinationClass: BT.ClassBType): Either[(AbstractInsnNode, OptimizerWarning), List[AbstractInsnNode]]
Returns
Returns
Right(Nil)if all instructions can be safely inlinedRight(insns)if inlining any ofinsnswould cause a java.lang.IllegalAccessError when inlined into thedestinationClassLeft((insn, warning))if validity of some instruction could not be checked because an error occurred
- def formatted(fmtstr: String): String
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final
def
getClass(): Class[_]
- Definition Classes
- AnyRef → Any
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def
hashCode(): Int
- Definition Classes
- AnyRef → Any
-
def
inline(request: InlineRequest, undo: UndoLog = NoUndoLogging): List[CannotInlineWarning]
Inline the callsite of an inlining request and its post-inlining requests.
Inline the callsite of an inlining request and its post-inlining requests.
- returns
An inliner warning for each callsite that could not be inlined.
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def
inlineCallsite(callsite: Callsite, undo: UndoLog = NoUndoLogging): Unit
Copy and adapt the instructions of a method to a callsite.
Copy and adapt the instructions of a method to a callsite.
Preconditions:
- The callsite can safely be inlined (canInlineBody is true)
- The maxLocals and maxStack values of the callsite method are correctly computed
- returns
A map associating instruction nodes of the callee with the corresponding cloned instruction in the callsite method.
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final
def
isInstanceOf[T0]: Boolean
- Definition Classes
- Any
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def
memberIsAccessible(memberFlags: Int, memberDeclClass: BT.ClassBType, memberRefClass: BT.ClassBType, from: BT.ClassBType): Either[OptimizerWarning, Boolean]
Check if a member reference is accessible from the destinationClass, as defined in the JVMS 5.4.4.
Check if a member reference is accessible from the destinationClass, as defined in the JVMS 5.4.4. Note that the class name in a field / method reference is not necessarily the class in which the member is declared:
class A { def f = 0 }; class B extends A { f }
The INVOKEVIRTUAL instruction uses a method reference "B.f ()I". Therefore this method has two parameters:
- memberDeclClass
The class in which the member is declared (A)
- memberRefClass
The class used in the member reference (B) (B0) JVMS 5.4.3.2 / 5.4.3.3: when resolving a member of class C in D, the class C is resolved first. According to 5.4.3.1, this requires C to be accessible in D. JVMS 5.4.4 summary: A field or method R is accessible to a class D (destinationClass) iff (B1) R is public (B2) R is protected, declared in C (memberDeclClass) and D is a subclass of C. If R is not static, R must contain a symbolic reference to a class T (memberRefClass), such that T is either a subclass of D, a superclass of D, or D itself. Also (P) needs to be satisfied. (B3) R is either protected or has default access and declared by a class in the same run-time package as D. If R is protected, also (P) needs to be satisfied. (B4) R is private and is declared in D. (P) When accessing a protected instance member, the target object on the stack (the receiver) has to be a subtype of D (destinationClass). This is enforced by classfile verification (https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.10.1.8). TODO: we cannot currently implement (P) because we don't have the necessary information available. Once we have a type propagation analysis implemented, we can extract the receiver type from there (https://github.com/scala-opt/scala/issues/13).
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final
def
ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
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final
def
notify(): Unit
- Definition Classes
- AnyRef
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final
def
notifyAll(): Unit
- Definition Classes
- AnyRef
- def runInliner(): Unit
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final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
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def
toString(): String
- Definition Classes
- AnyRef → Any
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final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
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final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
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final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
- def →[B](y: B): (Inliner[BT], B)
- object InlineLog
-
object
callsiteOrdering
extends Ordering[InlineRequest]
Ordering for inline requests.
Ordering for inline requests. Required to make the inliner deterministic:
- Always remove the same request when breaking inlining cycles
- Perform inlinings in a consistent order
The Scala compiler and reflection APIs.