$ echo 'import Foundation; let lhs = 10, rhs = 9, count = 10000000, expect = Int(pow(Double(lhs), Double(rhs))); func test() { var x: Int = 0; for _ in 0..<count { x = Int(pow(Double(lhs), Double(rhs))) }; print(x == expect) }; test()'|swiftc -frontend -emit-ir -primary-file - -target x86_64-apple-darwin17.4.0 -enable-objc-interop -sdk /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk -O -color-diagnostics -disable-llvm-optzns -module-name main -o - |xcrun swift-demangle