Use -O9, tune for nocoma, assume at least a Pentium when generating code.

Review URL: http://codereview.chromium.org/4298

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@387 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

SConstruct

@@ -53,7 +53,7 @@ LIBRARY_FLAGS = {
       'CPPDEFINES':   ['ENABLE_DISASSEMBLER', 'DEBUG']
     },
     'mode:release': {
-      'CCFLAGS':      ['-O2']
+      'CCFLAGS':      ['-O9', '-mtune=nocona', '-march=pentium']
     },
     'wordsize:64': {
       'CCFLAGS':      ['-m32'],
@@ -188,7 +188,7 @@ SAMPLE_FLAGS = {
       'LINKFLAGS':    ['-m32']
     },
     'mode:release': {
-      'CCFLAGS':      ['-O2']
+      'CCFLAGS':      ['-O2', '-mtune=nocona', '-march=pentium']
     },
     'mode:debug': {
       'CCFLAGS':      ['-g', '-O0']

src/objects.cc

@@ -1691,7 +1691,7 @@ PropertyAttributes JSObject::GetPropertyAttributeWithInterceptor(
 PropertyAttributes JSObject::GetPropertyAttributeWithReceiver(
       JSObject* receiver,
       String* key) {
-  uint32_t index;
+  uint32_t index = 0;
   if (key->AsArrayIndex(&index)) {
     if (HasElementWithReceiver(receiver, index)) return NONE;
     return ABSENT;
@@ -1738,7 +1738,7 @@ PropertyAttributes JSObject::GetPropertyAttribute(JSObject* receiver,
 
 PropertyAttributes JSObject::GetLocalPropertyAttribute(String* name) {
   // Check whether the name is an array index.
-  uint32_t index;
+  uint32_t index = 0;
   if (name->AsArrayIndex(&index)) {
     if (HasLocalElement(index)) return NONE;
     return ABSENT;
@@ -2010,7 +2010,7 @@ Object* JSObject::DeleteProperty(String* name) {
   // ECMA-262, 3rd, 8.6.2.5
   ASSERT(name->IsString());
 
-  uint32_t index;
+  uint32_t index = 0;
   if (name->AsArrayIndex(&index)) {
     return DeleteElement(index);
   } else {