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Unified Diff: src/allocation-site-scopes.cc

Issue 27366003: AllocationSites for all literals (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Minor nit. Created 7 years, 2 months ago
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Index: src/allocation-site-scopes.cc
diff --git a/src/allocation-site-scopes.cc b/src/allocation-site-scopes.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8097045b27d6be89d5d5922e6f14c01668e1648f
--- /dev/null
+++ b/src/allocation-site-scopes.cc
@@ -0,0 +1,108 @@
+// Copyright 2013 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
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// 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 "allocation-site-scopes.h"
+
+namespace v8 {
+namespace internal {
+
+
+Handle<AllocationSite> AllocationSiteCreationContext::EnterNewScope() {
+ Handle<AllocationSite> scope_site;
+ if (top().is_null()) {
+ // We are creating the top level AllocationSite as opposed to a nested
+ // AllocationSite.
+ InitializeTraversal(isolate()->factory()->NewAllocationSite());
+ scope_site = Handle<AllocationSite>(*top(), isolate());
+ if (FLAG_trace_creation_allocation_sites) {
+ PrintF("*** Creating top level AllocationSite %p\n",
+ static_cast<void*>(*scope_site));
+ }
+ } else {
+ ASSERT(!current().is_null());
+ scope_site = isolate()->factory()->NewAllocationSite();
+ if (FLAG_trace_creation_allocation_sites) {
+ PrintF("Creating nested site (top, current, new) (%p, %p, %p)\n",
+ static_cast<void*>(*top()),
+ static_cast<void*>(*current()),
+ static_cast<void*>(*scope_site));
+ }
+ current()->set_nested_site(*scope_site);
+ update_current_site(*scope_site);
+ }
+ ASSERT(!scope_site.is_null());
+ return scope_site;
+}
+
+
+void AllocationSiteCreationContext::ExitScope(
+ Handle<AllocationSite> scope_site,
+ Handle<JSObject> object) {
+ if (!object.is_null() && !object->IsFailure()) {
+ bool top_level = !scope_site.is_null() &&
+ top().is_identical_to(scope_site);
+
+ scope_site->set_transition_info(*object);
+ if (FLAG_trace_creation_allocation_sites) {
+ if (top_level) {
+ PrintF("*** Setting AllocationSite %p transition_info %p\n",
+ static_cast<void*>(*scope_site),
+ static_cast<void*>(*object));
+ } else {
+ PrintF("Setting AllocationSite (%p, %p) transition_info %p\n",
+ static_cast<void*>(*top()),
+ static_cast<void*>(*scope_site),
+ static_cast<void*>(*object));
+ }
+ }
+ }
+}
+
+
+Handle<AllocationSite> AllocationSiteUsageContext::EnterNewScope() {
+ if (top().is_null()) {
+ InitializeTraversal(top_site_);
+ } else {
+ // Advance current site
+ Object* nested_site = current()->nested_site();
+ // Something is wrong if we advance to the end of the list here.
+ ASSERT(nested_site->IsAllocationSite());
+ update_current_site(AllocationSite::cast(nested_site));
+ }
+ return Handle<AllocationSite>(*current(), isolate());
+}
+
+
+void AllocationSiteUsageContext::ExitScope(
+ Handle<AllocationSite> scope_site,
+ Handle<JSObject> object) {
+ // This assert ensures that we are pointing at the right sub-object in a
+ // recursive walk of a nested literal.
+ ASSERT(object.is_null() || *object == scope_site->transition_info());
+}
+
+} } // namespace v8::internal
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