Swift SIL: add UseList.isSingleUse

eeckstein · eeckstein · commit 7c71f0091e2e · 2022-05-12T21:48:37.000+02:00
diff --git a/SwiftCompilerSources/Sources/SIL/Operand.swift b/SwiftCompilerSources/Sources/SIL/Operand.swift
@@ -99,13 +99,16 @@ public struct UseList : CollectionLikeSequence {
     self.firstOpPtr = firstOpPtr.op
   }
 
-  public var isSingleUse: Bool {
+  public var singleUse: Operand? {
     if let opPtr = firstOpPtr {
-      return Operand_nextUse(BridgedOperand(op: opPtr)).op == nil
+      if Operand_nextUse(BridgedOperand(op: opPtr)).op != nil { return nil }
+      return Operand(BridgedOperand(op: opPtr))
     }
-    return false
+    return nil
   }
 
+  public var isSingleUse: Bool { singleUse != nil }
+
   public func makeIterator() -> Iterator {
     return Iterator(currentOpPtr: firstOpPtr)
   }

Original file line number	Diff line number	Diff line change
`@@ -99,13 +99,16 @@ public struct UseList : CollectionLikeSequence {`
`99`	`99`	`self.firstOpPtr = firstOpPtr.op`
`100`	`100`	`}`
`101`	`101`
`102`		`- public var isSingleUse: Bool {`
	`102`	`+ public var singleUse: Operand? {`
`103`	`103`	`if let opPtr = firstOpPtr {`
`104`		`- return Operand_nextUse(BridgedOperand(op: opPtr)).op == nil`
	`104`	`+ if Operand_nextUse(BridgedOperand(op: opPtr)).op != nil { return nil }`
	`105`	`+ return Operand(BridgedOperand(op: opPtr))`
`105`	`106`	`}`
`106`		`- return false`
	`107`	`+ return nil`
`107`	`108`	`}`
`108`	`109`
	`110`	`+ public var isSingleUse: Bool { singleUse != nil }`
	`111`	`+`
`109`	`112`	`public func makeIterator() -> Iterator {`
`110`	`113`	`return Iterator(currentOpPtr: firstOpPtr)`
`111`	`114`	`}`