[4.2][benchmark] RandomIntegersLCG: Fix result check on 32-bit platforms

lorentey · lorentey · commit 9e10a1be1833 · 2018-06-20T12:12:19.000+01:00
Values returned by random APIs depend on the bitWidth of the underlying integer type; make sure we use a consistent integer width when expecting particular results. (cherry picked from commit d66d6b4)
diff --git a/benchmark/single-source/RandomValues.swift b/benchmark/single-source/RandomValues.swift
@@ -54,10 +54,10 @@ public func run_RandomIntegersDef(_ N: Int) {
 @inline(never)
 public func run_RandomIntegersLCG(_ N: Int) {
   for _ in 0 ..< N {
-    var x = 0
+    var x: Int64 = 0
     var generator = LCRNG(seed: 0)
     for _ in 0 ..< 100_000 {
-      x &+= Int.random(in: 0...10_000, using: &generator)
+      x &+= Int64.random(in: 0...10_000, using: &generator)
     }
     CheckResults(x == 498214315)
   }

Original file line number	Diff line number	Diff line change
`@@ -54,10 +54,10 @@ public func run_RandomIntegersDef(_ N: Int) {`
`54`	`54`	`@inline(never)`
`55`	`55`	`public func run_RandomIntegersLCG(_ N: Int) {`
`56`	`56`	`for _ in 0 ..< N {`
`57`		`- var x = 0`
	`57`	`+ var x: Int64 = 0`
`58`	`58`	`var generator = LCRNG(seed: 0)`
`59`	`59`	`for _ in 0 ..< 100_000 {`
`60`		`- x &+= Int.random(in: 0...10_000, using: &generator)`
	`60`	`+ x &+= Int64.random(in: 0...10_000, using: &generator)`
`61`	`61`	`}`
`62`	`62`	`CheckResults(x == 498214315)`
`63`	`63`	`}`