Reland "Merge old data and pointer space."

src/x87/macro-assembler-x87.h

Index: src/x87/macro-assembler-x87.h
diff --git a/src/x87/macro-assembler-x87.h b/src/x87/macro-assembler-x87.h
index c392598c91bf9750df72f82d3d2a7f7b19796656..cbaabc89d0927af822905859b31b0771d81fb2ab 100644
--- a/src/x87/macro-assembler-x87.h
+++ b/src/x87/macro-assembler-x87.h
@@ -566,7 +566,7 @@ class MacroAssembler: public Assembler {
   // ---------------------------------------------------------------------------
   // Allocation support
 
-  // Allocate an object in new space or old pointer space. If the given space
+  // Allocate an object in new space or old space. If the given space
   // is exhausted control continues at the gc_required label. The allocated
   // object is returned in result and end of the new object is returned in
   // result_end. The register scratch can be passed as no_reg in which case