Don't mix handler flags into regular flag compuation.

src/x64/ic-x64.cc

Index: src/x64/ic-x64.cc
diff --git a/src/x64/ic-x64.cc b/src/x64/ic-x64.cc
index c76eca04d8ce80b7518a990692c4afbebca91b41..06105f30ae860053d8612063dcf8c9fb945a9973 100644
--- a/src/x64/ic-x64.cc
+++ b/src/x64/ic-x64.cc
@@ -982,9 +982,7 @@ void LoadIC::GenerateMegamorphic(MacroAssembler* masm,
   // -----------------------------------
 
   // Probe the stub cache.
-  Code::Flags flags = Code::ComputeFlags(
-      Code::HANDLER, MONOMORPHIC, extra_state,
-      Code::NORMAL, Code::LOAD_IC);
+  Code::Flags flags = Code::ComputeHandlerFlags(Code::LOAD_IC, extra_state);
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, rax, rcx, rbx, rdx);
 
@@ -1092,7 +1090,7 @@ void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
 
 
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm,
-                                  ExtraICState extra_ic_state) {
+                                  ExtraICState extra_state) {
   // ----------- S t a t e -------------
   //  -- rax    : value
   //  -- rcx    : name
@@ -1101,9 +1099,7 @@ void StoreIC::GenerateMegamorphic(MacroAssembler* masm,
   // -----------------------------------
 
   // Get the receiver from the stack and probe the stub cache.
-  Code::Flags flags = Code::ComputeFlags(
-      Code::HANDLER, MONOMORPHIC, extra_ic_state,
-      Code::NORMAL, Code::STORE_IC);
+  Code::Flags flags = Code::ComputeHandlerFlags(Code::STORE_IC, extra_state);
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, rdx, rcx, rbx, no_reg);