Recommit "[CommandLine] Remove OptionCategory and SubCommand caches from the Option class."

Previously reverted in 364141 due to buildbot breakage, and fixed here
by making GeneralCategory global a ManagedStatic.

Summary:
This change processes `OptionCategory`s and `SubCommand`s as they
are seen instead of caching them in the Option class and processing
them later.  Doing so simplifies the work needed to be done by the Global
parser and significantly reduces the size of the Option class to a mere 64
bytes.

Removing  the `OptionCategory` cache saved 24 bytes, and removing
the `SubCommand` cache saved an additional 48 bytes, for a total of a
72 byte reduction.

Reviewed By: serge-sans-paille

Tags: #llvm, #clang

Differential Revision: https://reviews.llvm.org/D62105

llvm-svn: 365675

1 files changed, 48 insertions, 22 deletions

diff --git a/llvm/unittests/Support/CommandLineTest.cpp b/llvm/unittests/Support/CommandLineTest.cpp
index 1a1c8a4..f180e05 100644
--- a/llvm/unittests/Support/CommandLineTest.cpp
+++ b/llvm/unittests/Support/CommandLineTest.cpp
@@ -95,16 +95,16 @@ TEST(CommandLineTest, ModifyExisitingOption) {
   cl::Option *Retrieved = Map["test-option"];
   ASSERT_EQ(&TestOption, Retrieved) << "Retrieved wrong option.";
 
-  ASSERT_NE(Retrieved->Categories.end(),
-            find_if(Retrieved->Categories,
+  ASSERT_NE(Retrieved->getCategories().end(),
+            find_if(Retrieved->getCategories(),
                     [&](const llvm::cl::OptionCategory *Cat) {
-                      return Cat == &cl::GeneralCategory;
+                      return Cat == &*cl::GeneralCategory;
                     }))
       << "Incorrect default option category.";
 
   Retrieved->addCategory(TestCategory);
-  ASSERT_NE(Retrieved->Categories.end(),
-            find_if(Retrieved->Categories,
+  ASSERT_NE(Retrieved->getCategories().end(),
+            find_if(Retrieved->getCategories(),
                     [&](const llvm::cl::OptionCategory *Cat) {
                       return Cat == &TestCategory;
                     }))
@@ -160,8 +160,8 @@ TEST(CommandLineTest, ParseEnvironmentToLocalVar) {
 TEST(CommandLineTest, UseOptionCategory) {
   StackOption<int> TestOption2("test-option", cl::cat(TestCategory));
 
-  ASSERT_NE(TestOption2.Categories.end(),
-            find_if(TestOption2.Categories,
+  ASSERT_NE(TestOption2.getCategories().end(),
+            find_if(TestOption2.getCategories(),
                          [&](const llvm::cl::OptionCategory *Cat) {
                            return Cat == &TestCategory;
                          }))
@@ -170,42 +170,44 @@ TEST(CommandLineTest, UseOptionCategory) {
 
 TEST(CommandLineTest, UseMultipleCategories) {
   StackOption<int> TestOption2("test-option2", cl::cat(TestCategory),
-                               cl::cat(cl::GeneralCategory),
-                               cl::cat(cl::GeneralCategory));
+                               cl::cat(*cl::GeneralCategory),
+                               cl::cat(*cl::GeneralCategory));
+  auto TestOption2Categories = TestOption2.getCategories();
 
   // Make sure cl::GeneralCategory wasn't added twice.
-  ASSERT_EQ(TestOption2.Categories.size(), 2U);
+  ASSERT_EQ(TestOption2Categories.size(), 2U);
 
-  ASSERT_NE(TestOption2.Categories.end(),
-            find_if(TestOption2.Categories,
+  ASSERT_NE(TestOption2Categories.end(),
+            find_if(TestOption2Categories,
                          [&](const llvm::cl::OptionCategory *Cat) {
                            return Cat == &TestCategory;
                          }))
       << "Failed to assign Option Category.";
-  ASSERT_NE(TestOption2.Categories.end(),
-            find_if(TestOption2.Categories,
+  ASSERT_NE(TestOption2Categories.end(),
+            find_if(TestOption2Categories,
                          [&](const llvm::cl::OptionCategory *Cat) {
-                           return Cat == &cl::GeneralCategory;
+                           return Cat == &*cl::GeneralCategory;
                          }))
       << "Failed to assign General Category.";
 
   cl::OptionCategory AnotherCategory("Additional test Options", "Description");
   StackOption<int> TestOption("test-option", cl::cat(TestCategory),
                               cl::cat(AnotherCategory));
-  ASSERT_EQ(TestOption.Categories.end(),
-            find_if(TestOption.Categories,
+  auto TestOptionCategories = TestOption.getCategories();
+  ASSERT_EQ(TestOptionCategories.end(),
+            find_if(TestOptionCategories,
                          [&](const llvm::cl::OptionCategory *Cat) {
-                           return Cat == &cl::GeneralCategory;
+                           return Cat == &*cl::GeneralCategory;
                          }))
       << "Failed to remove General Category.";
-  ASSERT_NE(TestOption.Categories.end(),
-            find_if(TestOption.Categories,
+  ASSERT_NE(TestOptionCategories.end(),
+            find_if(TestOptionCategories,
                          [&](const llvm::cl::OptionCategory *Cat) {
                            return Cat == &TestCategory;
                          }))
       << "Failed to assign Option Category.";
-  ASSERT_NE(TestOption.Categories.end(),
-            find_if(TestOption.Categories,
+  ASSERT_NE(TestOptionCategories.end(),
+            find_if(TestOptionCategories,
                          [&](const llvm::cl::OptionCategory *Cat) {
                            return Cat == &AnotherCategory;
                          }))
@@ -378,6 +380,30 @@ TEST(CommandLineTest, AliasRequired) {
   testAliasRequired(array_lengthof(opts2), opts2);
 }
 
+TEST(CommandLineTest, AliasWithSubCommand) {
+  StackSubCommand SC1("sc1", "Subcommand 1");
+  StackOption<std::string> Option1("option", cl::value_desc("output file"),
+                                   cl::init("-"), cl::desc("Option"),
+                                   cl::sub(SC1));
+  StackOption<std::string, cl::alias> Alias1("o", llvm::cl::aliasopt(Option1),
+                                             cl::desc("Alias for --option"),
+                                             cl::sub(SC1));
+}
+
+TEST(CommandLineTest, AliasWithMultipleSubCommandsWithSameOption) {
+  StackSubCommand SC1("sc1", "Subcommand 1");
+  StackOption<std::string> Option1("option", cl::value_desc("output file"),
+                                   cl::init("-"), cl::desc("Option"),
+                                   cl::sub(SC1));
+  StackSubCommand SC2("sc2", "Subcommand 2");
+  StackOption<std::string> Option2("option", cl::value_desc("output file"),
+                                   cl::init("-"), cl::desc("Option"),
+                                   cl::sub(SC2));
+
+  StackOption<std::string, cl::alias> Alias1("o", llvm::cl::aliasopt(Option1),
+                                             cl::desc("Alias for --option"));
+}
+
 TEST(CommandLineTest, HideUnrelatedOptions) {
   StackOption<int> TestOption1("hide-option-1");
   StackOption<int> TestOption2("hide-option-2", cl::cat(TestCategory));