[cmake][build-script] Add support for building the runtime with +0 no…

…rmal args.

I am upstreaming some changes to the runtime to support +0 normal arguments.

rdar://34222540

CMakeLists.txt

@@ -296,6 +296,10 @@ option(SWIFT_STDLIB_ENABLE_SIL_OWNERSHIP
   "Build the standard libraries and overlays with sil ownership enabled."
   FALSE)
 
+option(SWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS
+  "Build the standard libraries, overlays, and runtime with normal arguments at +0"
+  FALSE)
+
 #
 # End of user-configurable options.
 #

stdlib/public/runtime/CMakeLists.txt

@@ -23,6 +23,11 @@ if(SWIFT_RUNTIME_ENABLE_LEAK_CHECKER)
   set(swift_runtime_leaks_sources Leaks.mm)
 endif()
 
+if(SWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS)
+  list(APPEND swift_runtime_compile_flags
+    "-DSWIFT_RUNTIME_ENABLE_GUARANTEED_NORMAL_ARGUMENTS")
+endif()
+
 list(APPEND swift_runtime_compile_flags
      "-D__SWIFT_CURRENT_DYLIB=swiftCore")
 

utils/build_swift/driver_arguments.py

@@ -437,6 +437,9 @@ def create_argument_parser():
     option('--enable-sil-ownership', store_true,
            help='Enable the SIL ownership model')
 
+    option('--enable-guaranteed-normal-arguments', store_true,
+           help='Enable guaranteed normal arguments')
+
     option('--force-optimized-typechecker', store_true,
            help='Force the type checker to be built with '
                 'optimization')

utils/build_swift/tests/expected_options.py

@@ -114,6 +114,7 @@
     'enable_asan': False,
     'enable_lsan': False,
     'enable_sil_ownership': False,
+    'enable_guaranteed_normal_arguments': False,
     'enable_tsan': False,
     'enable_tsan_runtime': False,
     'enable_ubsan': False,
@@ -374,6 +375,7 @@ class IgnoreOption(_BaseOption):
     SetTrueOption('--clean'),
     SetTrueOption('--dry-run'),
     SetTrueOption('--enable-sil-ownership'),
+    SetTrueOption('--enable-guaranteed-normal-arguments'),
     SetTrueOption('--force-optimized-typechecker'),
     SetTrueOption('--ios'),
     SetTrueOption('--llbuild', dest='build_llbuild'),

utils/swift_build_support/swift_build_support/products/swift.py

@@ -33,6 +33,9 @@ def __init__(self, args, toolchain, source_dir, build_dir):
         # Add any sil ownership flags.
         self.cmake_options.extend(self._sil_ownership_flags)
 
+        # Add any guaranteed normal arguments flags
+        self.cmake_options.extend(self._guaranteed_normal_arguments_flags)
+
         # Generate the compile db.
         self.cmake_options.extend(self._compile_db_flags)
 
@@ -109,6 +112,12 @@ def _sil_ownership_flags(self):
             return ["-DSWIFT_STDLIB_ENABLE_SIL_OWNERSHIP=FALSE"]
         return ["-DSWIFT_STDLIB_ENABLE_SIL_OWNERSHIP=TRUE"]
 
+    @property
+    def _guaranteed_normal_arguments_flags(self):
+        if not self.args.enable_guaranteed_normal_arguments:
+            return ["-DSWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS=FALSE"]
+        return ["-DSWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS=TRUE"]
+
     @property
     def _compile_db_flags(self):
         return ['-DCMAKE_EXPORT_COMPILE_COMMANDS=TRUE']

utils/swift_build_support/tests/products/test_swift.py

@@ -56,6 +56,7 @@ def setUp(self):
             benchmark_num_onone_iterations=3,
             benchmark_num_o_iterations=3,
             enable_sil_ownership=False,
+            enable_guaranteed_normal_arguments=False,
             force_optimized_typechecker=False)
 
         # Setup shell
@@ -86,6 +87,7 @@ def test_by_default_no_cmake_options(self):
         self.assertEqual(set(swift.cmake_options), set([
                          '-DCMAKE_EXPORT_COMPILE_COMMANDS=TRUE',
                          '-DSWIFT_STDLIB_ENABLE_SIL_OWNERSHIP=FALSE',
+                         '-DSWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS=FALSE',
                          '-DSWIFT_FORCE_OPTIMIZED_TYPECHECKER=FALSE']))
 
     def test_swift_runtime_tsan(self):
@@ -95,11 +97,12 @@ def test_swift_runtime_tsan(self):
             toolchain=self.toolchain,
             source_dir='/path/to/src',
             build_dir='/path/to/build')
-        self.assertEqual(set(swift.cmake_options),
-                         set(['-DSWIFT_RUNTIME_USE_SANITIZERS=Thread',
-                              '-DCMAKE_EXPORT_COMPILE_COMMANDS=TRUE',
-                              '-DSWIFT_STDLIB_ENABLE_SIL_OWNERSHIP=FALSE',
-                              '-DSWIFT_FORCE_OPTIMIZED_TYPECHECKER=FALSE']))
+        flags_set = set(['-DSWIFT_RUNTIME_USE_SANITIZERS=Thread',
+                         '-DCMAKE_EXPORT_COMPILE_COMMANDS=TRUE',
+                         '-DSWIFT_STDLIB_ENABLE_SIL_OWNERSHIP=FALSE',
+                         '-DSWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS=FALSE',
+                         '-DSWIFT_FORCE_OPTIMIZED_TYPECHECKER=FALSE'])
+        self.assertEqual(set(swift.cmake_options), flags_set)
 
     def test_swift_compiler_vendor_flags(self):
         self.args.compiler_vendor = "none"
@@ -285,6 +288,18 @@ def test_sil_ownership_flags(self):
             [x for x in swift.cmake_options
              if 'SWIFT_STDLIB_ENABLE_SIL_OWNERSHIP' in x])
 
+    def test_swift_guaranteed_normal_arguments_flags(self):
+        self.args.enable_guaranteed_normal_arguments = True
+        swift = Swift(
+            args=self.args,
+            toolchain=self.toolchain,
+            source_dir='/path/to/src',
+            build_dir='/path/to/build')
+        self.assertEqual(
+            ['-DSWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS=TRUE'],
+            [x for x in swift.cmake_options
+             if 'SWIFT_ENABLE_GUARANTEED_NORMAL_ARGUMENTS' in x])
+
     def test_force_optimized_typechecker_flags(self):
         self.args.force_optimized_typechecker = True
         swift = Swift(