Merge pull request #78068 from eeckstein/copy-to-borrow-optimization

Optimizer: add an optimization to remove `copy_value` of a borrowed value.

Author: eeckstein

SwiftCompilerSources/Sources/Optimizer/DataStructures/InstructionRange.swift

@@ -59,6 +59,11 @@ struct InstructionRange : CustomStringConvertible, NoReflectionChildren {
     self.inExclusiveRange.insert(beginInst)
   }
 
+  init<S: Sequence>(begin beginInst: Instruction, ends: S, _ context: some Context) where S.Element: Instruction {
+    self = InstructionRange(begin: beginInst, context)
+    insert(contentsOf: ends)
+  }
+
   init(for value: Value, _ context: some Context) {
     self = InstructionRange(begin: InstructionRange.beginningInstruction(for: value), context)
   }

SwiftCompilerSources/Sources/Optimizer/FunctionPasses/CMakeLists.txt

@@ -15,14 +15,14 @@ swift_compiler_sources(Optimizer
   ClosureSpecialization.swift
   ComputeEscapeEffects.swift
   ComputeSideEffects.swift
+  CopyToBorrowOptimization.swift
   DeadStoreElimination.swift
   DeinitDevirtualizer.swift
   InitializeStaticGlobals.swift
   LetPropertyLowering.swift
   LifetimeDependenceDiagnostics.swift
   LifetimeDependenceInsertion.swift
   LifetimeDependenceScopeFixup.swift
-  LoadCopyToBorrowOptimization.swift
   ObjectOutliner.swift
   ObjCBridgingOptimization.swift
   MergeCondFails.swift