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// RUN: %target-swift-frontend -O -module-name=test -emit-sil %s | %FileCheck %s
func convert<
T: BinaryFloatingPoint, U: BinaryFloatingPoint
>(_ value: T, to: U.Type) -> U {
U(value)
}
// Check that the following functions can be optimized to concrete conversions.
// CHECK-LABEL: sil @$s4test0A13DoubleToFloatySfSdF
// CHECK: bb0(%0 : $Double):
// CHECK: struct_extract %0 : $Double, #Double._value
// CHECK-NEXT: builtin "fptrunc_FPIEEE64_FPIEEE32"
// CHECK-NEXT: struct $Float
// CHECK-NEXT: return
// CHECK-NEXT: } // end sil function '$s4test0A13DoubleToFloatySfSdF'
public func testDoubleToFloat(_ x: Double) -> Float {
return convert(x, to: Float.self)
}
// CHECK-LABEL: sil @$s4test0A13FloatToDoubleySdSfF
// CHECK: bb0(%0 : $Float):
// CHECK: struct_extract %0 : $Float, #Float._value
// CHECK-NEXT: builtin "fpext_FPIEEE32_FPIEEE64"
// CHECK-NEXT: struct $Double
// CHECK-NEXT: return
// CHECK-NEXT: } // end sil function '$s4test0A13FloatToDoubleySdSfF'
public func testFloatToDouble(_ x: Float) -> Double {
return convert(x, to: Double.self)
}
// Check that the following functions can be optimized to no-ops.
// CHECK-LABEL: sil @$s4test0A6DoubleyS2dF
// CHECK: return %0
// CHECK: } // end sil function '$s4test0A6DoubleyS2dF'
public func testDouble(_ x: Double) -> Double {
return convert(x, to: Double.self)
}
// CHECK-LABEL: sil @$s4test0A5FloatyS2fF
// CHECK: return %0
// CHECK: } // end sil function '$s4test0A5FloatyS2fF'
public func testFloat(_ x: Float) -> Float {
return convert(x, to: Float.self)
}
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