Simplify end_borrow creation.

Author: MAJKFL

SwiftCompilerSources/Sources/Optimizer/FunctionPasses/LoopInvariantCodeMotion.swift

@@ -334,7 +334,6 @@ private func collectMovableInstructions(
           movableInstructions.scopedInsts.append(beginBorrowInst)
         }
       case let fullApplySite as FullApplySite:
-        // TODO: Use set for this check.
         guard analyzedInstructions.readOnlyApplies.contains(where: { $0 == fullApplySite }) else {
           break
         }
@@ -904,16 +903,11 @@ private extension Instruction {
     let copyValue = headerBuilder.createCopyValue(operand: preheaderLoadBorrow)
     loadCopyInst.replace(with: copyValue, context)
 
-    var createdEndBorrow: EndBorrowInst?
     for exitBlock in loop.exitBlocks where !context.deadEndBlocks.isDeadEnd(exitBlock) {
       assert(exitBlock.hasSinglePredecessor, "Exiting edge should not be critical.")
 
-      if let createdEndBorrow {
-        createdEndBorrow.copy(before: exitBlock.instructions.first!, context)
-      } else {
-        let exitBlockBuilder = Builder(before: exitBlock.instructions.first!, context)
-        createdEndBorrow = exitBlockBuilder.createEndBorrow(of: preheaderLoadBorrow)
-      }
+      let exitBlockBuilder = Builder(before: exitBlock.instructions.first!, context)
+      exitBlockBuilder.createEndBorrow(of: preheaderLoadBorrow)
     }
   }