Improve polymorphic loads on single slots.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 758701652049b7251446d473ef4064c741e2fca5..fe8a506e872c776e45495ee2e0c715230dee4fd9 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1788,9 +1788,9 @@ LInstruction* LChunkBuilder::DoCheckFunction(HCheckFunction* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoCheckMap(HCheckMap* instr) {
+LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  LCheckMap* result = new(zone()) LCheckMap(value);
+  LCheckMaps* result = new(zone()) LCheckMaps(value);
   return AssignEnvironment(result);
 }