Introduce global contexts to represent lexical global scope(s).

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index e76806e4f9d8b73ab727edba7b85ec693f19b07f..56cfa369965916dd0e5972e405699a4e59a42258 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -178,14 +178,22 @@ void FullCodeGenerator::Generate() {
   // Possibly allocate a local context.
   int heap_slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
   if (heap_slots > 0) {
-    Comment cmnt(masm_, "[ Allocate local context");
-    // Argument to NewContext is the function, which is still in edi.
-    __ push(edi);
-    if (heap_slots <= FastNewContextStub::kMaximumSlots) {
-      FastNewContextStub stub(heap_slots);
-      __ CallStub(&stub);
+    if (info->scope()->is_global_scope()) {
+      Comment cmnt(masm_, "[ Allocate global context");
+      // Argument to NewContext is the function, which is still in edi.
+      __ push(edi);

[Sven Panne, 2012/08/27 06:24:54]

Consider moving the push before the if.

[rossberg, 2012/08/27 09:07:16]

Done.

+      __ Push(info->scope()->GetScopeInfo());
+      __ CallRuntime(Runtime::kNewGlobalContext, 2);
     } else {
-      __ CallRuntime(Runtime::kNewFunctionContext, 1);
+      Comment cmnt(masm_, "[ Allocate function context");
+      // Argument to NewContext is the function, which is still in edi.
+      __ push(edi);
+      if (heap_slots <= FastNewContextStub::kMaximumSlots) {
+        FastNewContextStub stub(heap_slots);
+        __ CallStub(&stub);
+      } else {
+        __ CallRuntime(Runtime::kNewFunctionContext, 1);
+      }
     }
     function_in_register = false;
     // Context is returned in both eax and esi.  It replaces the context