X87: Check that external references are registered in the serializer.

port r22896

original commit message:
  Check that external references are registered in the serializer.
  Inspired by a patch by Slava Chigrin <vchigrin@yandex-team.ru>;

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/446003004

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22952 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

diff --git a/src/x87/macro-assembler-x87.cc b/src/x87/macro-assembler-x87.cc
index 07f0fed..6196d8f 100644 (file)
--- a/src/x87/macro-assembler-x87.cc
+++ b/src/x87/macro-assembler-x87.cc
@@ -3015,6 +3015,7 @@ void MacroAssembler::CheckPageFlagForMap(
     Label::Distance condition_met_distance) {
   DCHECK(cc == zero || cc == not_zero);
   Page* page = Page::FromAddress(map->address());
+  DCHECK(!serializer_enabled());  // Serializer cannot match page_flags.
   ExternalReference reference(ExternalReference::page_flags(page));
   // The inlined static address check of the page's flags relies
   // on maps never being compacted.