swift-mirror/test/SILOptimizer/string_optimization.swift

// RUN: %target-build-swift -O %s -module-name=test -Xfrontend -sil-verify-all -emit-sil | %FileCheck %s

// RUN: %empty-directory(%t) 
// RUN: %target-build-swift -O -module-name=test %s -o %t/a.out
// RUN: %target-run %t/a.out | %FileCheck %s -check-prefix=CHECK-OUTPUT

// REQUIRES: executable_test,swift_stdlib_no_asserts
// REQUIRES: swift_in_compiler

#if _runtime(_ObjC)
import Foundation
#endif

struct Outer {
  struct Inner { }

  class InnerClass { }

  static let staticString = "static"
}

class C {
  @inline(never)
  func f() -> String {
    return "\(Self.self)"
  }
}

// More types are tested in test/stdlib/TypeName.swift and
// test/stdlib/TypeNameInterpolation.swift

// CHECK-LABEL: sil [noinline] @$s4test0A21TypeNameInterpolationSSyF
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A21TypeNameInterpolationSSyF'
@inline(never)
public func testTypeNameInterpolation() -> String {
  return "-\(Outer.Inner.self)+"
}

// CHECK-LABEL: sil [noinline] @$s4test0A25FoldCompleteInterpolationSSyF 
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A25FoldCompleteInterpolationSSyF'
@inline(never)
public func testFoldCompleteInterpolation() -> String {
  let s = "is"
  return "-\([Int].self) \(s) \("cool")+"
}

// CHECK-LABEL: sil [noinline] @$s4test0A13FoldStaticLetSSyF
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A13FoldStaticLetSSyF'
@inline(never)
public func testFoldStaticLet() -> String {
  return "-\(Outer.staticString)+"
}

// CHECK-LABEL: sil [noinline] @$s4test0A10FoldConcatSSyF
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A10FoldConcatSSyF'
@inline(never)
public func testFoldConcat() -> String {
  return "a" + "b" + "c"
}

// CHECK-LABEL: sil hidden [noinline] @$s4test0A25InterpolationInLongStringSSyF :
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A25InterpolationInLongStringSSyF'
@inline(never)
func testInterpolationInLongString() -> String {
  return "\(#function) used in a veeeeeeeeeeeeeeeeeeeery long string"
}

// CHECK-LABEL: sil [noinline] @$s4test0A19UnqualifiedTypeNameSSyF 
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A19UnqualifiedTypeNameSSyF'
@inline(never)
public func testUnqualifiedTypeName() -> String {
  return _typeName(Outer.Inner.self, qualified: false)
}

// CHECK-LABEL: sil [noinline] @$s4test0A17QualifiedTypeNameSSyF 
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A17QualifiedTypeNameSSyF'
@inline(never)
public func testQualifiedTypeName() -> String {
  return _typeName(Outer.Inner.self, qualified: true)
}

// CHECK-LABEL: sil [noinline] @$s4test0A20UnqualifiedLocalTypeSSyF
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A20UnqualifiedLocalTypeSSyF'
@inline(never)
public func testUnqualifiedLocalType() -> String {
  struct LocalStruct { }
  return _typeName(LocalStruct.self, qualified: false)
}

// CHECK-LABEL: sil [noinline] @$s4test0A18QualifiedLocalTypeSSyF
// CHECK:    [[F:%[0-9]+]] = function_ref @$ss9_typeName_9qualifiedSSypXp_SbtF
// CHECK:    apply [[F]]
// CHECK: } // end sil function '$s4test0A18QualifiedLocalTypeSSyF'
@inline(never)
public func testQualifiedLocalType() -> String {
  struct LocalStruct { }
  return _typeName(LocalStruct.self, qualified: true)
}

// CHECK-LABEL: sil [noinline] @$s4test0A10InnerClassSSyF
// CHECK-NOT: apply
// CHECK-NOT: bb1
// CHECK: } // end sil function '$s4test0A10InnerClassSSyF'
@inline(never)
public func testInnerClass() -> String {
  return _typeName(Outer.InnerClass.self, qualified: true)
}

#if _runtime(_ObjC)
@inline(never)
public func testObjcClassName(qualified: Bool) -> String {
  return _typeName(NSObject.self, qualified: qualified)
}
#endif


@inline(never)
func printEmbedded(_ s: String) {
  print("<\(s)>")
}

// CHECK-OUTPUT: <-Inner+>
printEmbedded(testTypeNameInterpolation())

// CHECK-OUTPUT: <-Array<Int> is cool+>
printEmbedded(testFoldCompleteInterpolation())

// CHECK-OUTPUT: <-static+>
printEmbedded(testFoldStaticLet())

// CHECK-OUTPUT: <abc>
printEmbedded(testFoldConcat())

// CHECK-OUTPUT: <testInterpolationInLongString() used in a veeeeeeeeeeeeeeeeeeeery long string>
printEmbedded(testInterpolationInLongString())

// CHECK-OUTPUT: <Inner>
printEmbedded(testUnqualifiedTypeName())

// CHECK-OUTPUT: <test.Outer.Inner>
printEmbedded(testQualifiedTypeName())

// CHECK-OUTPUT: <LocalStruct>
printEmbedded(testUnqualifiedLocalType())

// CHECK-OUTPUT: <test.(unknown context at {{.*}}).LocalStruct>
printEmbedded(testQualifiedLocalType())

// CHECK-OUTPUT: <test.Outer.InnerClass>
printEmbedded(testInnerClass())

// CHECK-OUTPUT: <C>
printEmbedded(C().f())

#if _runtime(_ObjC)

// Can't use check-output here, because for non ObjC runtimes it would not match.  
if testObjcClassName(qualified: false) != "NSObject" {
  fatalError()
}
if testObjcClassName(qualified: true) != "NSObject" {
  fatalError()
}

#endif