tests: replace '// RUN: rm -rf' '// RUN: mkdir' pairs with '%empty-directory(...)'

These changes were made using a script.

test/ClangImporter/MixedSource/import-mixed-framework.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp -r %S/Inputs/mixed-framework/Mixed.framework %t
 
 // Don't crash if a generated header is present but the swiftmodule is missing.

test/ClangImporter/MixedSource/resolve-cross-language.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource) -emit-module -emit-objc-header -o %t %S/Inputs/resolve-cross-language/Base.swift -disable-objc-attr-requires-foundation-module
 // RUN: cp %S/Inputs/resolve-cross-language/Base-module.map %t/module.map

test/ClangImporter/autolinking.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend %s -sdk %S/Inputs -I %S/Inputs/custom-modules -emit-ir -o %t/without-adapter.ll
 // RUN: %FileCheck %s < %t/without-adapter.ll
 

test/ClangImporter/cstring_parse.swift

@@ -1,7 +1,6 @@
 // Note: this test intentionally uses a private module cache.
 //
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -verify -module-cache-path %t/clang-module-cache -I %S/Inputs %s
 // RUN: ls -lR %t/clang-module-cache | %FileCheck %s
 

test/ClangImporter/enum-error-execute.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-clang %S/Inputs/enum-error.m -c -o %t/enum-error.o
 // RUN: %target-build-swift -import-objc-header %S/Inputs/enum-error.h -Xlinker %t/enum-error.o %s -o %t/a.out
 // RUN: %target-run %t/a.out | %FileCheck %s

test/ClangImporter/missing-adapter.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-frontend -emit-module -parse-as-library %S/Inputs/adapter.swift -sdk %S/Inputs -I %S/Inputs/custom-modules -module-name ClangModuleWithAdapter -o %t
 // RUN: %target-swift-frontend %s -sdk %S/Inputs -I %S/Inputs/custom-modules -I %t -typecheck

test/ClangImporter/serialization.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module-path %t/SerializationHelper.swiftmodule -I %S/Inputs/custom-modules %S/Inputs/SerializationHelper.swift -sdk "" -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend -typecheck -sdk "" -I %t -I %S/Inputs/custom-modules %s -verify
 

test/ClangImporter/submodules.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -verify %s -DIMPORT_TOP_LEVEL
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -verify %s

test/ClangImporter/submodules_indirect.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -verify -I %S/Inputs/custom-modules/ %s
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -o %t -emit-module -I %S/Inputs/custom-modules/ %s -module-name submodules
 // RUN: echo 'import submodules; let s = "\(x), \(y)"' | %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck - -I %t -I %S/Inputs/custom-modules/

test/ClangImporter/submodules_scoped.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -verify %s -DCHECK_SCOPING
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %s -module-name submodules
 // RUN: echo 'import submodules; let s = "\(x), \(y)"' | %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck - -I %t

test/DebugInfo/ASTSection_linker.swift

@@ -1,7 +1,6 @@
 // Run test ASTSection.swift, with separate compile and link steps.
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-frontend -c -sdk /fake/sdk/path -Xcc -DA -Xcc -DB -emit-module -o %t %S/ASTSection.swift
 // RUN: %swift-ide-test -test-CompilerInvocation-from-module -source-filename=%t/ASTSection.swiftmodule

test/DebugInfo/inlinescopes.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: echo "public var x = Int64()" \
 // RUN:   | %target-swift-frontend -module-name FooBar -emit-module -o %t -
 // RUN: %target-swift-frontend %s -O -I %t -emit-ir -g -o %t.ll

test/Driver/actions.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // XFAIL: freebsd, linux
 

test/Driver/bindings.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %swiftc_driver -driver-print-bindings -target x86_64-apple-macosx10.9 %s 2>&1 | %FileCheck %s -check-prefix=BASIC
 // BASIC: # "x86_64-apple-macosx10.9" - "swift", inputs: ["{{.*}}bindings.swift"], output: {object: "[[OBJECT:.*\.o]]"}

test/Driver/emit-objc-header.swift

@@ -1,6 +1,5 @@
 // FIXME: BEGIN -enable-source-import hackaround
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %clang-importer-sdk-path/swift-modules/Foundation.swift
 // FIXME: END -enable-source-import hackaround
 

test/Driver/filelists.swift

@@ -18,12 +18,12 @@
 // CHECK-WMO-NOT: Handled
 
 
-// RUN: mkdir -p %t/bin
+// RUN: %empty-directory(%t/bin)
 // RUN: ln -s %S/Inputs/filelists/fake-ld.py %t/bin/ld
 
 // RUN: (cd %t && %swiftc_driver_plain -driver-use-frontend-path %S/Inputs/filelists/check-filelist-abc.py -c ./a.swift ./b.swift ./c.swift -module-name main -target x86_64-apple-macosx10.9 -driver-use-filelists -output-file-map=%S/Inputs/filelists/output.json -force-single-frontend-invocation -num-threads 1 2>&1 | %FileCheck -check-prefix=CHECK-WMO-THREADED %s)
 // RUN: (cd %t && %swiftc_driver_plain -driver-use-frontend-path %S/Inputs/filelists/check-filelist-abc.py -c ./a.swift ./b.swift ./c.swift -module-name main -target x86_64-apple-macosx10.9 -driver-use-filelists -output-file-map=%S/Inputs/filelists/output.json -force-single-frontend-invocation -num-threads 1 -embed-bitcode 2>&1 | %FileCheck -check-prefix=CHECK-WMO-THREADED %s)
-// RUN: mkdir -p %t/tmp/
+// RUN: %empty-directory(%t/tmp)
 // RUN: (cd %t && env TMPDIR="%t/tmp/" %swiftc_driver_plain -driver-use-frontend-path %S/Inputs/filelists/check-filelist-abc.py -c ./a.swift ./b.swift ./c.swift -module-name main -target x86_64-apple-macosx10.9 -driver-use-filelists -output-file-map=%S/Inputs/filelists/output.json -force-single-frontend-invocation -num-threads 1 -save-temps 2>&1 | %FileCheck -check-prefix=CHECK-WMO-THREADED %s)
 // RUN: ls %t/tmp/sources-* %t/tmp/outputs-*
 

test/Driver/output.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: mkdir -p %t/sub
 // RUN: cd %t
 

test/Driver/sdk-link.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -o %t/test.swiftmodule %s
 // RUN: %target-build-swift -g -o %t/sdk-link %s
 // RUN: %target-run %t/sdk-link | %FileCheck %s

test/IDE/compatibility_alias.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %build-clang-importer-objc-overlays
 
 // RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk-nosource) -I %t -I %S/Inputs/custom-modules -print-module -source-filename %s -module-to-print=CompatibilityAlias > %t.printed.CompatibilityAlias.txt

test/IDE/complete_dynamic_lookup.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -disable-objc-attr-requires-foundation-module -o %t %S/Inputs/AnyObject/foo_swift_module.swift
 // RUN: %target-swift-frontend -emit-module -disable-objc-attr-requires-foundation-module -o %t %S/Inputs/AnyObject/bar_swift_module.swift
 // RUN: cp %S/Inputs/AnyObject/baz_clang_module.h %t

test/IDE/complete_from_reexport.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-swift-frontend -emit-module -module-name FooSwiftModule %S/Inputs/foo_swift_module.swift -o %t
 // RUN: %target-swift-frontend -emit-module -module-name FooSwiftModuleOverlay %S/Inputs/foo_swift_module_overlay.swift -I %t -o %t

test/IDE/complete_from_swift_module.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/foo_swift_module.swift
 //

test/IDE/module_api_smoketest.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %swift-ide-test -generate-module-api-description -- -target %target-triple -module-cache-path %t %s | %FileCheck %s
 
 public struct Struct1 {}

test/IDE/newtype.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %build-clang-importer-objc-overlays
 // RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk-nosource) -I %t -I %S/Inputs/custom-modules -print-module -source-filename %s -module-to-print=Newtype -skip-unavailable > %t.printed.A.txt
 // RUN: %FileCheck %s -check-prefix=PRINT -strict-whitespace < %t.printed.A.txt

test/IDE/newtype_objc.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %build-clang-importer-objc-overlays
 
 // RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk-nosource) -I %t -I %S/Inputs/custom-modules -print-module -source-filename %s -module-to-print=NewtypeObjC > %t.printed.NewtypeObjC.txt

test/IDE/print_ast_overlay.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-build-swift -emit-module -module-name Foo -o %t -F %S/Inputs/mock-sdk %s
 //
 // RUN: %target-swift-ide-test -print-module -source-filename %s -I %t -F %S/Inputs/mock-sdk -module-to-print=Foo -accessibility-filter-public > %t.printed.txt

test/IDE/print_clang_decls.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // XFAIL: linux
 

test/IDE/print_clang_decls_AppKit.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // This file deliberately does not use %clang-importer-sdk for most RUN lines.
 // Instead, it generates custom overlay modules itself, and uses -I %t when it

test/IDE/print_clang_foundation.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-ide-test -print-module -source-filename %s -module-to-print=Foundation.NSArray -function-definitions=false > %t/Foundation.NSArray.printed.txt
 // RUN: %FileCheck -input-file %t/Foundation.NSArray.printed.txt -check-prefix=CHECK_NSARRAY %s

test/IDE/print_clang_framework.swift

@@ -1,8 +1,7 @@
 // TODO: Properties with unowned or weak ownership should not be bridged.
 // XFAIL: *
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-ide-test(mock-sdk: -F %S/Inputs/mock-sdk) -print-module -source-filename %s -module-to-print=Foo -function-definitions=false -print-regular-comments > %t/Foo.printed.txt
 // RUN: diff -u %S/Inputs/mock-sdk/Foo.printed.txt %t/Foo.printed.txt

test/IDE/print_clang_framework_with_overlay.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-frontend(mock-sdk: -F %S/Inputs/mock-sdk) -I %t -emit-module -o %t/FooOverlay.swiftmodule %S/Inputs/FooOverlay.swift
 // RUN: %target-swift-ide-test(mock-sdk: -F %S/Inputs/mock-sdk) -I %t -print-module -source-filename %s -module-to-print=FooOverlay -function-definitions=false | %FileCheck %s

test/IDE/print_module_comments.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // Build swift modules this test depends on.
 // RUN: %target-swift-frontend -emit-module %S/Inputs/foo_swift_module.swift -emit-module-path %t/foo_swift_module.swiftmodule -emit-module-doc-path %t/foo_swift_module.swiftdoc

test/IDE/print_module_without_deinit.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %s
 // RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk) -print-module -skip-deinit=true -module-to-print=print_module_without_deinit -I %t -source-filename=%s | %FileCheck -check-prefix=SKIP1 %s
 // RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk) -print-module -skip-deinit=false -module-to-print=print_module_without_deinit -I %t -source-filename=%s | %FileCheck -check-prefix=NOSKIP1 %s

test/IDE/print_omit_needless_words.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // REQUIRES: objc_interop
 // FIXME: this is failing on simulators

test/IDE/print_omit_needless_words_appkit.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // REQUIRES: objc_interop
 // REQUIRES: OS=macosx

test/IDE/sdk_sugar.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-ide-test -print-module -module-print-submodules -module-to-print=Foundation -function-definitions=false -source-filename %s > %t/out 2>&1
 // RUN: %FileCheck -input-file=%t/out %s
 

test/IRGen/autolink-coff-force-link.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %swift -target i686--windows-msvc -parse-as-library -parse-stdlib -module-name autolink -module-link-name autolink -autolink-force-load -emit-ir -o - %s | %FileCheck %s
 // RUN: %swift -target i686--windows-itanium -parse-as-library -parse-stdlib -module-name autolink -module-link-name autolink -autolink-force-load -S -o - %s | %FileCheck %s -check-prefix CHECK-ASM-GNU

test/IRGen/autolink-coff.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %swift -target thumbv7--windows-itanium -parse-as-library -parse-stdlib -emit-module-path %t/module.swiftmodule -module-name module -module-link-name module %s
 // RUN: %swift -target thumbv7--windows-itanium -parse-as-library -parse-stdlib -module-name autolink -I %t -D MAIN_MODULE -emit-ir -o - %s | %FileCheck %s -check-prefix CHECK-MSVC-IR

test/IRGen/autolink-psei.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %swift -target x86_64-scei-ps4 -parse-as-library -parse-stdlib -emit-module-path %t/module.swiftmodule -module-name module -module-link-name module %s
 // RUN: %swift -target x86_64-scei-ps4 -parse-as-library -parse-stdlib -module-name autolink -I %t -D MAIN_MODULE -emit-ir -o - %s | %FileCheck %s -check-prefix CHECK-IR
 

test/IRGen/autolink_elf.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %swift -target x86_64-unknown-linux-gnu -emit-module -parse-stdlib -o %t -module-name Empty -module-link-name swiftEmpty %S/../Inputs/empty.swift
 // RUN: %swift -target x86_64-unknown-linux-gnu %s -I %t -parse-stdlib -disable-objc-interop -module-name main -emit-ir -o - | %FileCheck %s
 

test/IRGen/enum_derived.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -emit-module -module-name def_enum -o %t %S/Inputs/def_enum.swift
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -I %t -O -primary-file %s -emit-ir | %FileCheck -check-prefix=CHECK -check-prefix=CHECK-NORMAL %s
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -I %t -O -primary-file %s -enable-testing -emit-ir | %FileCheck -check-prefix=CHECK -check-prefix=CHECK-TESTABLE %s

test/IRGen/linker_options_objc.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swiftc_driver -emit-module -o %t -module-name Empty -module-link-name swiftEmpty %S/../Inputs/empty.swift
 // RUN: %target-swiftc_driver %s -I %t -emit-ir | %FileCheck %s
 

test/IRGen/newtype.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %build-irgen-test-overlays
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/Inputs -I %t -I %S/../IDE/Inputs/custom-modules) %s -emit-ir | %FileCheck %s
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/Inputs -I %t -I %S/../IDE/Inputs/custom-modules) %s -emit-ir -O | %FileCheck %s -check-prefix=OPT

test/IRGen/report_dead_method_call.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // We compile with -O (optimizations) and -disable-access-control (which
 // allows use to "call" methods that are removed by dead code elimination).

test/IRGen/sil_witness_tables_external_witnesstable.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -emit-module %S/Inputs/sil_witness_tables_external_input.swift -o %t/Swift.swiftmodule -parse-stdlib -parse-as-library -module-name Swift -sil-serialize-all -module-link-name swiftCore
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -I %t -primary-file %s -emit-ir | %FileCheck %s
 

test/IRGen/super.sil

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -emit-module -enable-resilience -I %t -module-name resilient_struct -o %t %S/../Inputs/resilient_struct.swift
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -emit-module -enable-resilience -I %t -module-name resilient_class -o %t %S/../Inputs/resilient_class.swift
 // RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil -enable-resilience -parse-sil -parse-as-library -emit-ir -I %t %s | %FileCheck %s

test/InterfaceHash/added_function.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_method.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_class_private_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_class_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_enum_private_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_enum_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_method.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_method_value_types.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_protocol_method.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_protocol_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_struct_private_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/added_private_struct_property.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/changed_private_var_type.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/changed_var_name.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/changed_var_type.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/edited_function_body.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/edited_method_body.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/InterfaceHash/edited_property_getter.swift

@@ -1,4 +1,4 @@
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %utils/split_file.py -o %t %s
 // RUN: %target-swift-frontend -dump-interface-hash %t/a.swift 2> %t/a.hash
 // RUN: %target-swift-frontend -dump-interface-hash %t/b.swift 2> %t/b.hash

test/Interpreter/SDK/OS_objects.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift %t/main.swift -I %S/Inputs/custom-modules/ -o %t/OS_objects -Xfrontend -disable-access-control

test/Interpreter/SDK/weak_objc_interop.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: cp %s %t/main.swift
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCWeak/ObjCWeak.m -c -o %t/ObjCWeak.o

test/Interpreter/collection_casts.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-build-swift %s -o %t/main
 // RUN: %target-build-swift %s -o %t/main-optimized
 // RUN: %target-run %t/main | %FileCheck %s

test/Interpreter/generic_objc_subclass.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 // RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ -Xlinker %t/ObjCClasses.o %s -o %t/a.out

test/Interpreter/import_as_member.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %clang -isysroot %sdk %S/Inputs/ImportAsMember/IAMVec.c -c -o %t/IAMVec.o
 // RUN: %target-build-swift -I %S/Inputs/ImportAsMember/ -Xlinker %t/IAMVec.o %s -o %t/a.out
 // RUN: %target-run %t/a.out | %FileCheck %s

test/Interpreter/imported_objc_generics.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 // RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ %t/ObjCClasses.o %s -o %t/a.out

test/Interpreter/imported_objc_generics_extension.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 // RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ %t/ObjCClasses.o %s -o %t/a.out

test/Interpreter/objc_bool.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 // RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ -Xlinker %t/ObjCClasses.o %s -o %t/a.out

test/Interpreter/objc_failable_initializers.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 // RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ -Xlinker %t/ObjCClasses.o %s -o %t/a.out

test/Interpreter/objc_throwing_initializers.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 //
 // RUN: %target-clang -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 // RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ -Xlinker %t/ObjCClasses.o %s -o %t/a.out

test/NameBinding/import-resolution-2.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/abcde.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/aeiou.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/asdf.swift

test/NameBinding/import-resolution-overload.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/overload_intFunctions.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/overload_boolFunctions.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/overload_vars.swift

test/NameBinding/import-resolution.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // RUN: %target-swift-frontend -typecheck %s -enable-source-import -I %S/Inputs -sdk "" -verify -show-diagnostics-after-fatal
 // RUN: not %target-swift-frontend -typecheck %s -I %S/Inputs -sdk "" -show-diagnostics-after-fatal 2>&1 | %FileCheck %s -check-prefix=CHECK-NO-SOURCE-IMPORT

test/NameBinding/import-specific-decl.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/asdf.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/abcde.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/aeiou.swift

test/NameBinding/import-specific-fixits.swift

@@ -1,6 +1,5 @@
 // RUN: rm -f %t.*
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/ambiguous_left.swift
 // RUN: %target-swift-frontend -emit-module -o %t %S/Inputs/ambiguous_right.swift
 // RUN: %target-swift-frontend -emit-module -o %t -I %t %S/Inputs/ambiguous.swift

test/PlaygroundTransform/array.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/control-flow.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/declarations.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/disable_transform_only.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -disable-playground-transform -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s -allow-empty

test/PlaygroundTransform/do-catch.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/high_performance.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -playground-high-performance -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/init.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/mutation.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/placeholder.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -disable-playground-transform -o %t/main %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/plus_equals.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PlaygroundTransform/print.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: cp %s %t/main.swift
 // RUN: %target-build-swift -Xfrontend -playground -Xfrontend -debugger-support -o %t/main %S/Inputs/PlaygroundsRuntime.swift %t/main.swift
 // RUN: %target-run %t/main | %FileCheck %s

test/PrintAsObjC/blocks.swift

@@ -1,7 +1,6 @@
 // Please keep this file in alphabetical order!
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %s -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/blocks.swiftmodule -typecheck -emit-objc-header-path %t/blocks.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/blocks.h

test/PrintAsObjC/cdecl.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -enable-source-import -emit-module -emit-module-doc -o %t %s -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/cdecl.swiftmodule -typecheck -emit-objc-header-path %t/cdecl.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/cdecl.h

test/PrintAsObjC/classes.swift

@@ -2,8 +2,7 @@
 
 // REQUIRES: objc_interop
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 
 // FIXME: BEGIN -enable-source-import hackaround
 // RUN:  %target-swift-frontend(mock-sdk: -sdk %S/../Inputs/clang-importer-sdk -I %t) -emit-module -o %t %S/../Inputs/clang-importer-sdk/swift-modules/ObjectiveC.swift

test/PrintAsObjC/comments.swift

@@ -1,7 +1,6 @@
 // Please keep this file in alphabetical order!
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -enable-source-import -emit-module -emit-module-path %t/comments.swiftmodule -emit-module-doc -emit-module-doc-path %t/comments.swiftdoc -module-name comments %S/../Inputs/comment_to_something_conversion.swift -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/comments.swiftmodule -typecheck -emit-objc-header-path %t/comments.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: awk '/A000/,0' %t/comments.h > %t/comments.h-cleaned

test/PrintAsObjC/empty.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) %s -typecheck -emit-objc-header-path %t/empty.h
 // RUN: %FileCheck %s < %t/empty.h
 // RUN: %check-in-clang -std=c99 %t/empty.h

test/PrintAsObjC/enums.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -enable-source-import -emit-module -emit-module-doc -o %t %s -import-objc-header %S/Inputs/enums.h -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/enums.swiftmodule -typecheck -emit-objc-header-path %t/enums.h -import-objc-header %S/Inputs/enums.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/enums.h

test/PrintAsObjC/extensions.swift

@@ -1,7 +1,6 @@
 // Please keep this file in alphabetical order!
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %s -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/extensions.swiftmodule -typecheck -emit-objc-header-path %t/extensions.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/extensions.h

test/PrintAsObjC/generic-ancestry.swift

@@ -1,7 +1,6 @@
 // Please keep this file in alphabetical order!
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %s -module-name generic -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/generic.swiftmodule -typecheck -emit-objc-header-path %t/generic.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/generic.h

test/PrintAsObjC/imported-block-typedefs.swift

@@ -1,5 +1,4 @@
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t %s -import-objc-header %S/Inputs/imported-block-typedefs.h -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library %t/imported-block-typedefs.swiftmodule -typecheck -emit-objc-header-path %t/imported-block-typedefs-output.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/imported-block-typedefs-output.h

test/PrintAsObjC/imports.swift

@@ -1,7 +1,6 @@
 // Please keep this file in alphabetical order!
 
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
+// RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -I %S/Inputs/custom-modules/ -emit-module -o %t %s -disable-objc-attr-requires-foundation-module
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -I %S/Inputs/custom-modules/ -parse-as-library %t/imports.swiftmodule -typecheck -emit-objc-header-path %t/imports.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module
 // RUN: %FileCheck %s < %t/imports.h