| // RUN: %target-swift-frontend -parse-as-library -O -emit-sil %s | %FileCheck %s |
| // REQUIRES: swift_stdlib_no_asserts,optimized_stdlib,CPU=x86_64 |
| |
| // This is an end-to-end test to ensure that the optimizer can propagate |
| // resilient enum cases (FloatingPointRoundingRule) and produces optimal |
| // code for Float.rounded(). |
| |
| // CHECK-LABEL: sil @{{.*}}propagate_roundingmode |
| // CHECK: bb0: |
| // CHECK-NEXT: %0 = integer_literal {{.*}}, 0 |
| // CHECK-NEXT: %1 = struct $Int (%0 {{.*}}) |
| // CHECK-NEXT: return %1 |
| public func propagate_roundingmode() -> Int { |
| let rm = FloatingPointRoundingRule.toNearestOrEven |
| switch rm { |
| case .toNearestOrAwayFromZero: |
| return 1 |
| default: |
| return 0 |
| } |
| } |
| |
| // CHECK-LABEL: sil @{{.*}}round_floating_point |
| // CHECK: bb0({{.*}}): |
| // CHECK: [[R:%[0-9]+]] = builtin "int_round{{.*}}" |
| // CHECK: [[F:%[0-9]+]] = struct $Float ([[R]] |
| // CHECK: return [[F]] |
| public func round_floating_point(_ x: Float) -> Float { |
| return x.rounded() |
| } |
