Change --hydrogen-filter to allow specifying a negative filter for optimized functions.

When prepending a '-' to the function name, the function will not be optimized.

--hydrogen-filter=foo works as before.

--hydrogen-filter=-foo means don't optimize foo.
Review URL: https://chromiumcodereview.appspot.com/9691042

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/codegen.cc

@@ -71,13 +71,6 @@ void CodeGenerator::MakeCodePrologue(CompilationInfo* info) {
   } else {
     print_source = FLAG_print_source;
     print_ast = FLAG_print_ast;
-    Vector<const char> filter = CStrVector(FLAG_hydrogen_filter);
-    if (print_source && !filter.is_empty()) {
-      print_source = info->function()->name()->IsEqualTo(filter);
-    }
-    if (print_ast && !filter.is_empty()) {
-      print_ast = info->function()->name()->IsEqualTo(filter);
-    }
     ftype = "user-defined";
   }
 
@@ -124,11 +117,9 @@ void CodeGenerator::PrintCode(Handle<Code> code, CompilationInfo* info) {
   bool print_code = Isolate::Current()->bootstrapper()->IsActive()
       ? FLAG_print_builtin_code
       : (FLAG_print_code || (info->IsOptimizing() && FLAG_print_opt_code));
-  Vector<const char> filter = CStrVector(FLAG_hydrogen_filter);
-  FunctionLiteral* function = info->function();
-  bool match = filter.is_empty() || function->debug_name()->IsEqualTo(filter);
-  if (print_code && match) {
+  if (print_code) {
     // Print the source code if available.
+    FunctionLiteral* function = info->function();
     Handle<Script> script = info->script();
     if (!script->IsUndefined() && !script->source()->IsUndefined()) {
       PrintF("--- Raw source ---\n");

src/compiler.cc

@@ -243,13 +243,16 @@ static bool MakeCrankshaftCode(CompilationInfo* info) {
   }
 
   // Take --hydrogen-filter into account.
-  Vector<const char> filter = CStrVector(FLAG_hydrogen_filter);
   Handle<String> name = info->function()->debug_name();
-  bool match = filter.is_empty() || name->IsEqualTo(filter);
-  if (!match) {
+  if (*FLAG_hydrogen_filter != '\0') {
+    Vector<const char> filter = CStrVector(FLAG_hydrogen_filter);
+    if ((filter[0] == '-'
+         && name->IsEqualTo(filter.SubVector(1, filter.length())))
+        || (filter[0] != '-' && !name->IsEqualTo(filter))) {
       info->SetCode(code);
       return true;
     }
+  }
 
   // Recompile the unoptimized version of the code if the current version
   // doesn't have deoptimization support. Alternatively, we may decide to

src/flag-definitions.h

@@ -159,7 +159,7 @@ DEFINE_bool(string_slices, true, "use string slices")
 
 // Flags for Crankshaft.
 DEFINE_bool(crankshaft, true, "use crankshaft")
-DEFINE_string(hydrogen_filter, "", "hydrogen use/trace filter")
+DEFINE_string(hydrogen_filter, "", "optimization filter")
 DEFINE_bool(use_range, true, "use hydrogen range analysis")
 DEFINE_bool(eliminate_dead_phis, true, "eliminate dead phis")
 DEFINE_bool(use_gvn, true, "use hydrogen global value numbering")