Basic infrastructure for fast two-pass compilation. A CFG is...

src/compiler.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
 
 #include "bootstrapper.h"
+#include "cfg.h"
 #include "codegen-inl.h"
 #include "compilation-cache.h"
 #include "compiler.h"
 #include "debug.h"
 #include "oprofile-agent.h"
 #include "rewriter.h"
 #include "scopes.h"
 #include "usage-analyzer.h"
 
 namespace v8 {
@@ skipping 30 matching lines @@
   }
 #endif
 
   // Optimize the AST.
   if (!Rewriter::Optimize(literal)) {
     // Signal a stack overflow by returning a null handle.  The stack
     // overflow exception will be thrown by the caller.
     return Handle<Code>::null();
   }
 
+  if (FLAG_multipass) {
+    Cfg* cfg = Cfg::Build(literal);
+#ifdef DEBUG
+    if (FLAG_print_cfg && cfg != NULL) {
+      SmartPointer<char> name = literal->name()->ToCString();
+      PrintF("Function \"%s\":\n", *name);
+      cfg->Print();
+      PrintF("\n");
+    }
+#endif
+    if (cfg != NULL) {
+      return cfg->Compile(literal, script);
+    }
+  }
+
   // Generate code and return it.
   Handle<Code> result = CodeGenerator::MakeCode(literal, script, is_eval);
   return result;
 }
 
 
 static bool IsValidJSON(FunctionLiteral* lit) {
   if (!lit->body()->length() == 1)
     return false;
   Statement* stmt = lit->body()->at(0);
@@ skipping 309 matching lines @@
   // Set the expected number of properties for instances.
   SetExpectedNofPropertiesFromEstimate(shared, lit->expected_property_count());
 
   // Check the function has compiled code.
   ASSERT(shared->is_compiled());
   return true;
 }
 
 
 } }  // namespace v8::internal