Adding gflags to handle command line flags.

It sucks, but is the best there is without using boost.

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "third_party/gyp"]
 	path = third_party/gyp
 	url = https://github.com/benvanik/gyp.git
+[submodule "third_party/gflags"]
+	path = third_party/gflags
+	url = https://github.com/benvanik/gflags.git

common.gypi

@@ -60,6 +60,7 @@
       'release': {
         'defines': [
           'RELEASE',
+          'NDEBUG',
         ],
         'msvs_configuration_attributes': {
           'OutputDirectory': '<(DEPTH)\\build\\xenia\\release',

include/xenia/cpu/sdb.h

@@ -157,6 +157,7 @@ public:
 
   int GetAllFunctions(vector<FunctionSymbol*>& functions);
 
+  void Write(const char* file_name);
   void Dump();
   void DumpFunctionBlocks(FunctionSymbol* fn);
 

src/cpu/codegen/module_generator.cc

@@ -26,6 +26,8 @@
 #include <xenia/cpu/ppc.h>
 #include <xenia/cpu/codegen/function_generator.h>
 
+#include "cpu/cpu-private.h"
+
 
 using namespace llvm;
 using namespace xe;
@@ -234,15 +236,15 @@ void ModuleGenerator::BuildFunction(CodegenFunction* cgf) {
 
 void ModuleGenerator::OptimizeFunction(Module* m, Function* fn) {
   FunctionPassManager pm(m);
-#if XE_OPTION(OPTIMIZED)
-  PassManagerBuilder pmb;
-  pmb.OptLevel      = 3;
-  pmb.SizeLevel     = 0;
-  pmb.Inliner       = createFunctionInliningPass();
-  pmb.Vectorize     = true;
-  pmb.LoopVectorize = true;
-  pmb.populateFunctionPassManager(pm);
-#endif  // XE_OPTION(OPTIMIZED)
+  if (FLAGS_optimize_ir_functions) {
+    PassManagerBuilder pmb;
+    pmb.OptLevel      = 3;
+    pmb.SizeLevel     = 0;
+    pmb.Inliner       = createFunctionInliningPass();
+    pmb.Vectorize     = true;
+    pmb.LoopVectorize = true;
+    pmb.populateFunctionPassManager(pm);
+  }
   pm.add(createVerifierPass());
   pm.run(*fn);
 }

src/cpu/cpu-private.h

@@ -0,0 +1,24 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_CPU_PRIVATE_H_
+#define XENIA_CPU_PRIVATE_H_
+
+#include <gflags/gflags.h>
+
+
+DECLARE_string(dump_path);
+DECLARE_bool(dump_module_bitcode);
+DECLARE_bool(dump_module_map);
+
+DECLARE_bool(optimize_ir_modules);
+DECLARE_bool(optimize_ir_functions);
+
+
+#endif  // XENIA_CPU_PRIVATE_H_

src/cpu/cpu.cc

@@ -0,0 +1,26 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include "cpu/cpu-private.h"
+
+
+// Dumping:
+DEFINE_string(dump_path, "build/",
+    "Directory that dump files are placed into.");
+DEFINE_bool(dump_module_bitcode, true,
+    "Writes the module bitcode both before and after optimizations.");
+DEFINE_bool(dump_module_map, true,
+    "Dumps the module symbol database.");
+
+
+// Optimizations:
+DEFINE_bool(optimize_ir_modules, true,
+    "Whether to run LLVM optimizations on modules.");
+DEFINE_bool(optimize_ir_functions, true,
+    "Whether to run LLVM optimizations on functions.");

src/cpu/exec_module.cc

@@ -31,6 +31,7 @@
 #include <xenia/cpu/codegen/module_generator.h>
 #include <xenia/cpu/sdb.h>
 
+#include "cpu/cpu-private.h"
 #include "cpu/xethunk/xethunk.h"
 
 
@@ -67,6 +68,8 @@ int ExecModule::Prepare() {
   int result_code = 1;
   std::string error_message;
 
+  char file_name[2048];
+
   OwningPtr<MemoryBuffer> shared_module_buffer;
   auto_ptr<Module> shared_module;
   auto_ptr<raw_ostream> outs;
@@ -80,7 +83,7 @@ int ExecModule::Prepare() {
   // Calculate a cache path based on the module, the CPU version, and other
   // bits.
   // TODO(benvanik): cache path calculation.
-  const char *cache_path = "build/generated.bc";
+  //const char *cache_path = "build/generated.bc";
 
   // Check the cache to see if the bitcode exists.
   // If it does, load that module directly. In the future we could also cache
@@ -104,6 +107,13 @@ int ExecModule::Prepare() {
     // Analyze the module and add its symbols to the symbol database.
     XEEXPECTZERO(sdb_->Analyze());
 
+    // Dump the symbol database.
+    if (FLAGS_dump_module_map) {
+      xesnprintf(file_name, XECOUNT(file_name),
+          "%s%s.map", FLAGS_dump_path.c_str(), module_->name());
+      sdb_->Write(file_name);
+    }
+
     // Initialize the module.
     gen_module_ = shared_ptr<Module>(
         new Module(module_->name(), *context_.get()));
@@ -126,13 +136,18 @@ int ExecModule::Prepare() {
         context_.get(), gen_module_.get()));
     XEEXPECTZERO(codegen_->Generate());
 
-    gen_module_->dump();
-
     // Write to cache.
-    outs = auto_ptr<raw_ostream>(new raw_fd_ostream(
-        cache_path, error_message, raw_fd_ostream::F_Binary));
-    XEEXPECTTRUE(error_message.empty());
-    WriteBitcodeToFile(gen_module_.get(), *outs);
+    // TODO(benvanik): cache stuff
+
+    // Dump pre-optimized module to disk.
+    if (FLAGS_dump_module_bitcode) {
+      xesnprintf(file_name, XECOUNT(file_name),
+          "%s%s-preopt.bc", FLAGS_dump_path.c_str(), module_->name());
+      outs = auto_ptr<raw_ostream>(new raw_fd_ostream(
+          file_name, error_message, raw_fd_ostream::F_Binary));
+      XEEXPECTTRUE(error_message.empty());
+      WriteBitcodeToFile(gen_module_.get(), *outs);
+    }
   }
 
   // Link optimizations.
@@ -143,19 +158,29 @@ int ExecModule::Prepare() {
 
   // Run full module optimizations.
   pm.add(new DataLayout(gen_module_.get()));
-#if XE_OPTION(OPTIMIZED)
-  pm.add(createVerifierPass());
-  pmb.OptLevel      = 3;
-  pmb.SizeLevel     = 0;
-  pmb.Inliner       = createFunctionInliningPass();
-  pmb.Vectorize     = true;
-  pmb.LoopVectorize = true;
-  pmb.populateModulePassManager(pm);
-  pmb.populateLTOPassManager(pm, false, true);
-#endif  // XE_OPTION(OPTIMIZED)
+  if (FLAGS_optimize_ir_modules) {
+    pm.add(createVerifierPass());
+    pmb.OptLevel      = 3;
+    pmb.SizeLevel     = 0;
+    pmb.Inliner       = createFunctionInliningPass();
+    pmb.Vectorize     = true;
+    pmb.LoopVectorize = true;
+    pmb.populateModulePassManager(pm);
+    pmb.populateLTOPassManager(pm, false, true);
+  }
   pm.add(createVerifierPass());
   pm.run(*gen_module_);
 
+  // Dump post-optimized module to disk.
+  if (FLAGS_optimize_ir_modules && FLAGS_dump_module_bitcode) {
+    xesnprintf(file_name, XECOUNT(file_name),
+        "%s%s.bc", FLAGS_dump_path.c_str(), module_->name());
+    outs = auto_ptr<raw_ostream>(new raw_fd_ostream(
+        file_name, error_message, raw_fd_ostream::F_Binary));
+    XEEXPECTTRUE(error_message.empty());
+    WriteBitcodeToFile(gen_module_.get(), *outs);
+  }
+
   // TODO(benvanik): experiment with LLD to see if we can write out a dll.
 
   // Initialize the module.
@@ -225,6 +250,6 @@ int ExecModule::Uninit() {
 }
 
 void ExecModule::Dump() {
-  // sdb_->Dump();
-  // gen_module_->dump();
+  sdb_->Dump();
+  gen_module_->dump();
 }

src/cpu/sdb.cc

@@ -241,6 +241,10 @@ int SymbolDatabase::GetAllFunctions(vector<FunctionSymbol*>& functions) {
   return 0;
 }
 
+void SymbolDatabase::Write(const char* file_name) {
+  // TODO(benvanik): write to file.
+}
+
 void SymbolDatabase::Dump() {
   uint32_t previous = 0;
   for (SymbolMap::iterator it = symbols_.begin(); it != symbols_.end(); ++it) {

src/cpu/sources.gypi

@@ -1,6 +1,7 @@
 # Copyright 2013 Ben Vanik. All Rights Reserved.
 {
   'sources': [
+    'cpu.cc',
     'exec_module.cc',
     'processor.cc',
     'sdb.cc',

third_party/gflags

@@ -0,0 +1 @@
+Subproject commit 56e77c6a2f10020f775cb68022f92fbb38e61804

third_party/gflags.gypi

@@ -0,0 +1,34 @@
+# Copyright 2013 Ben Vanik. All Rights Reserved.
+{
+  'targets': [
+    {
+      'target_name': 'gflags',
+      'type': 'static_library',
+
+      'direct_dependent_settings': {
+        'include_dirs': [
+          'gflags/src/',
+        ],
+      },
+
+      'include_dirs': [
+        'gflags/src/',
+      ],
+
+      'sources': [
+        'gflags/src/gflags.cc',
+        'gflags/src/gflags_completions.cc',
+        'gflags/src/gflags_nc.cc',
+        'gflags/src/gflags_reporting.cc',
+      ],
+
+      'conditions': [
+        ['OS == "win"', {
+          'sources!': [
+            'gflags/src/windows/port.cc',
+          ],
+        }],
+      ],
+    }
+  ]
+}

tools/xenia-info/xenia-info.cc

@@ -9,6 +9,8 @@
 
 #include <xenia/xenia.h>
 
+#include <gflags/gflags.h>
+
 
 using namespace xe;
 using namespace xe::cpu;
@@ -16,6 +18,12 @@ using namespace xe::kernel;
 
 
 int xenia_info(int argc, xechar_t **argv) {
+  std::string usage = "usage: ";
+  usage = usage + argv[0] + " some.xex";
+  google::SetUsageMessage(usage);
+  google::SetVersionString("1.0");
+  google::ParseCommandLineFlags(&argc, &argv, true);
+
   int result_code = 1;
 
   xe_pal_ref pal = NULL;
@@ -23,9 +31,9 @@ int xenia_info(int argc, xechar_t **argv) {
   shared_ptr<Processor> processor;
   shared_ptr<Runtime> runtime;
 
-  // TODO(benvanik): real command line parsing.
+  // Grab path.
   if (argc < 2) {
-    printf("usage: xenia-info some.xex\n");
+    google::ShowUsageWithFlags(argv[0]);
     return 1;
   }
   const xechar_t *path = argv[1];
@@ -51,6 +59,8 @@ int xenia_info(int argc, xechar_t **argv) {
 XECLEANUP:
   xe_memory_release(memory);
   xe_pal_release(pal);
+
+  google::ShutDownCommandLineFlags();
   return result_code;
 }
 XE_MAIN_THUNK(xenia_info);

tools/xenia-run/xenia-run.cc

@@ -9,6 +9,8 @@
 
 #include <xenia/xenia.h>
 
+#include <gflags/gflags.h>
+
 
 using namespace xe;
 using namespace xe::cpu;
@@ -70,14 +72,20 @@ int Run::Launch() {
 }
 
 int xenia_run(int argc, xechar_t **argv) {
+  std::string usage = "usage: ";
+  usage = usage + argv[0] + " some.xex";
+  google::SetUsageMessage(usage);
+  google::SetVersionString("1.0");
+  google::ParseCommandLineFlags(&argc, &argv, true);
+
   // Dummy call to keep the GPU code linking in to ensure it's working.
   do_gpu_stuff();
 
   int result_code = 1;
 
-  // TODO(benvanik): real command line parsing.
+  // Grab path.
   if (argc < 2) {
-    printf("usage: xenia-run some.xex\n");
+    google::ShowUsageWithFlags(argv[0]);
     return 1;
   }
   const xechar_t *path = argv[1];
@@ -91,9 +99,10 @@ int xenia_run(int argc, xechar_t **argv) {
 
   run->Launch();
 
-  return 0;
-
+  result_code = 0;
 XECLEANUP:
+
+  google::ShutDownCommandLineFlags();
   return result_code;
 }
 XE_MAIN_THUNK(xenia_run);

xenia.gyp

@@ -3,6 +3,7 @@
   'includes': [
     'common.gypi',
     'tools/tools.gypi',
+    'third_party/gflags.gypi',
   ],
 
   'targets': [
@@ -11,6 +12,13 @@
       'product_name': 'xeniacore',
       'type': 'static_library',
 
+      'dependencies': [
+        'gflags',
+      ],
+      'export_dependent_settings': [
+        'gflags',
+      ],
+
       'direct_dependent_settings': {
         'include_dirs': [
           'include/',
@@ -36,7 +44,6 @@
       'dependencies': [
         'xeniacore',
       ],
-
       'export_dependent_settings': [
         'xeniacore',
       ],