Merge pull request #11304 from eeckstein/fix-bm-warnings

Author: swift-ci

benchmark/single-source/CString.swift

@@ -30,7 +30,6 @@ public func run_StringWithCString(_ N: Int) {
 
 @inline(never)
 public func run_CStringLongAscii(_ N: Int) {
-  let refResult = 517492
   var res: UInt = 0
   for _ in 1...N*500 {
     // static string to c -> from c to String -> implicit conversion
@@ -41,7 +40,6 @@ public func run_CStringLongAscii(_ N: Int) {
 
 @inline(never)
 public func run_CStringLongNonAscii(_ N: Int) {
-  let refResult = 517492
   var res: UInt = 0
   for _ in 1...N*500 {
     res &= strlen(japanese.withCString(String.init(cString:)))

benchmark/single-source/DictionarySwap.swift

@@ -27,7 +27,7 @@ public func run_DictionarySwap(_ N: Int) {
 
     var swapped = false
     for _ in 1...10000*N {
-        swap(&dict[25]!, &dict[75]!)
+        (dict[25], dict[75]) = (dict[75]!, dict[25]!)
         swapped = !swapped
         if !swappedCorrectly(swapped, dict[25]!, dict[75]!) {
             break
@@ -72,7 +72,9 @@ public func run_DictionarySwapOfObjects(_ N: Int) {
 
     var swapped = false
     for _ in 1...10000*N {
-        swap(&dict[Box(25)]!, &dict[Box(75)]!)
+        let b1 = Box(25)
+        let b2 = Box(75)
+        (dict[b1], dict[b2]) = (dict[b2]!, dict[b1]!)
         swapped = !swapped
         if !swappedCorrectly(swapped, dict[Box(25)]!.value, dict[Box(75)]!.value) {
             break

benchmark/single-source/ExistentialPerformance.swift

@@ -326,7 +326,7 @@ func runTestArrayShift<T: Existential>(withType: T.Type, numberOfTimes N: Int) {
   for _ in 0 ..< N {
     for _ in 0 ..< 5_000 {
       for i in 0 ..< existentialArray.count-1 {
-        swap(&existentialArray[i], &existentialArray[i+1])
+        existentialArray.swapAt(i, i+1)
       }
     }
   }