SwiftCompilerSources: move the Context protocols from the Optimizer to the SIL module

This allows to move many SIL APIs and utilities, which require a context, to the SIL module.

The SIL-part of SwiftPassInvocation is extracted into a base class SILContext which now lives in SIL.

Also: simplify the begin/end-pass functions of the SwiftPassInvocation.

Author: eeckstein

SwiftCompilerSources/Sources/Optimizer/Analysis/AliasAnalysis.swift

@@ -15,7 +15,7 @@ import SIL
 
 extension FunctionPassContext {
   var aliasAnalysis: AliasAnalysis {
-    let bridgedAA = _bridged.getAliasAnalysis()
+    let bridgedAA = bridgedPassContext.getAliasAnalysis()
     return AliasAnalysis(bridged: bridgedAA, context: self)
   }
 }
@@ -113,15 +113,15 @@ struct AliasAnalysis {
         bridgedAliasAnalysis.mutableCachePointer.assumingMemoryBound(to: Cache.self).deinitialize(count: 1)
       },
       // getMemEffectsFn
-      { (bridgedCtxt: BridgedPassContext,
+      { (bridgedCtxt: BridgedContext,
          bridgedAliasAnalysis: BridgedAliasAnalysis,
          bridgedAddr: BridgedValue,
          bridgedInst: BridgedInstruction) -> BridgedMemoryBehavior in
         let aa = AliasAnalysis(bridged: bridgedAliasAnalysis, context: FunctionPassContext(_bridged: bridgedCtxt))
         return aa.getMemoryEffect(of: bridgedInst.instruction, on: bridgedAddr.value).bridged
       },
       // isObjReleasedFn
-      { (bridgedCtxt: BridgedPassContext,
+      { (bridgedCtxt: BridgedContext,
          bridgedAliasAnalysis: BridgedAliasAnalysis,
          bridgedObj: BridgedValue,
          bridgedInst: BridgedInstruction) -> Bool in
@@ -142,7 +142,7 @@ struct AliasAnalysis {
       },
 
       // isAddrVisibleFromObj
-      { (bridgedCtxt: BridgedPassContext,
+      { (bridgedCtxt: BridgedContext,
          bridgedAliasAnalysis: BridgedAliasAnalysis,
          bridgedAddr: BridgedValue,
          bridgedObj: BridgedValue) -> Bool in
@@ -159,7 +159,7 @@ struct AliasAnalysis {
       },
 
       // mayAliasFn
-      { (bridgedCtxt: BridgedPassContext,
+      { (bridgedCtxt: BridgedContext,
          bridgedAliasAnalysis: BridgedAliasAnalysis,
          bridgedLhs: BridgedValue,
          bridgedRhs: BridgedValue) -> Bool in

SwiftCompilerSources/Sources/Optimizer/DataStructures/Set.swift

@@ -33,7 +33,7 @@ protocol IntrusiveSet : CustomStringConvertible, NoReflectionChildren {
 /// destruct this data structure, e.g. in a `defer {}` block.
 struct BasicBlockSet : IntrusiveSet {
 
-  private let context: BridgedPassContext
+  private let context: BridgedContext
   private let bridged: BridgedBasicBlockSet
 
   init(_ context: some Context) {
@@ -78,7 +78,7 @@ struct BasicBlockSet : IntrusiveSet {
 /// destruct this data structure, e.g. in a `defer {}` block.
 struct ValueSet : IntrusiveSet {
 
-  private let context: BridgedPassContext
+  private let context: BridgedContext
   private let bridged: BridgedNodeSet
 
   init(_ context: some Context) {
@@ -137,7 +137,7 @@ struct ValueSet : IntrusiveSet {
 /// destruct this data structure, e.g. in a `defer {}` block.
 struct SpecificInstructionSet<InstType: Instruction> : IntrusiveSet {
 
-  private let context: BridgedPassContext
+  private let context: BridgedContext
   private let bridged: BridgedNodeSet
 
   init(_ context: some Context) {
@@ -226,7 +226,7 @@ typealias InstructionSetWithCount = SpecificInstructionSetWithCount<Instruction>
 /// destruct this data structure, e.g. in a `defer {}` block.
 struct OperandSet : IntrusiveSet {
 
-  private let context: BridgedPassContext
+  private let context: BridgedContext
   private let bridged: BridgedOperandSet
 
   init(_ context: some Context) {

SwiftCompilerSources/Sources/Optimizer/DataStructures/Stack.swift

@@ -26,34 +26,34 @@ import SIL
 /// destruct this data structure, e.g. in a `defer {}` block.
 struct Stack<Element> : CollectionLikeSequence {
 
-  private let bridgedContext: BridgedPassContext
-  private var firstSlab = BridgedPassContext.Slab(nil)
-  private var lastSlab = BridgedPassContext.Slab(nil)
+  private let bridgedContext: BridgedContext
+  private var firstSlab = BridgedContext.Slab(nil)
+  private var lastSlab = BridgedContext.Slab(nil)
   private var endIndex: Int = 0
 
   private static var slabCapacity: Int {
-    BridgedPassContext.Slab.getCapacity() / MemoryLayout<Element>.stride
+    BridgedContext.Slab.getCapacity() / MemoryLayout<Element>.stride
   }
 
-  private func allocate(after lastSlab: BridgedPassContext.Slab? = nil) -> BridgedPassContext.Slab {
-    let lastSlab = lastSlab ?? BridgedPassContext.Slab(nil)
+  private func allocate(after lastSlab: BridgedContext.Slab? = nil) -> BridgedContext.Slab {
+    let lastSlab = lastSlab ?? BridgedContext.Slab(nil)
     let newSlab = bridgedContext.allocSlab(lastSlab)
     UnsafeMutableRawPointer(newSlab.data!).bindMemory(to: Element.self, capacity: Stack.slabCapacity)
     return newSlab
   }
 
-  private static func element(in slab: BridgedPassContext.Slab, at index: Int) -> Element {
+  private static func element(in slab: BridgedContext.Slab, at index: Int) -> Element {
     return pointer(in: slab, at: index).pointee
   }
 
-  private static func pointer(in slab: BridgedPassContext.Slab, at index: Int) -> UnsafeMutablePointer<Element> {
+  private static func pointer(in slab: BridgedContext.Slab, at index: Int) -> UnsafeMutablePointer<Element> {
     return UnsafeMutableRawPointer(slab.data!).assumingMemoryBound(to: Element.self) + index
   }
 
   struct Iterator : IteratorProtocol {
-    var slab: BridgedPassContext.Slab
+    var slab: BridgedContext.Slab
     var index: Int
-    let lastSlab: BridgedPassContext.Slab
+    let lastSlab: BridgedContext.Slab
     let endIndex: Int
 
     mutating func next() -> Element? {
@@ -146,7 +146,7 @@ extension Stack {
   ///
   /// TODO: Marker should be ~Escapable.
   struct Marker {
-    let slab: BridgedPassContext.Slab
+    let slab: BridgedContext.Slab
     let index: Int
   }