Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(844)

Unified Diff: src/x87/stub-cache-x87.cc

Issue 446523002: Restore performance of accesses to JSGlobalProxy after r22802 (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 4 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/x64/stub-cache-x64.cc ('k') | no next file » | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/x87/stub-cache-x87.cc
diff --git a/src/x87/stub-cache-x87.cc b/src/x87/stub-cache-x87.cc
index 0574cb03a42f9fb24e3081e7a85ca3e55b782611..0d67c545c007ff349a483729f96ef85896c9836d 100644
--- a/src/x87/stub-cache-x87.cc
+++ b/src/x87/stub-cache-x87.cc
@@ -710,8 +710,8 @@ Register PropertyHandlerCompiler::CheckPrototypes(
prototype = handle(JSObject::cast(current_map->prototype()));
if (current_map->is_dictionary_map() &&
- !current_map->IsJSGlobalObjectMap() &&
- !current_map->IsJSGlobalProxyMap()) {
+ !current_map->IsJSGlobalObjectMap()) {
+ DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast.
if (!name->IsUniqueName()) {
DCHECK(name->IsString());
name = factory()->InternalizeString(Handle<String>::cast(name));
@@ -740,6 +740,9 @@ Register PropertyHandlerCompiler::CheckPrototypes(
// Check access rights to the global object. This has to happen after
// the map check so that we know that the object is actually a global
// object.
+ // This allows us to install generated handlers for accesses to the
+ // global proxy (as opposed to using slow ICs). See corresponding code
+ // in LookupForRead().
if (current_map->IsJSGlobalProxyMap()) {
__ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss);
} else if (current_map->IsJSGlobalObjectMap()) {
« no previous file with comments | « src/x64/stub-cache-x64.cc ('k') | no next file » | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698