[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/instruction-codes.h

Index: src/compiler/instruction-codes.h
diff --git a/src/compiler/instruction-codes.h b/src/compiler/instruction-codes.h
index d2144cf638a9e6fb60fddfbcc5e770f7972c707a..38b7809195cc9ec6f059e5a11523dc09be025e5a 100644
--- a/src/compiler/instruction-codes.h
+++ b/src/compiler/instruction-codes.h
@@ -110,7 +110,12 @@ enum AddressingMode {
 std::ostream& operator<<(std::ostream& os, const AddressingMode& am);
 
 // The mode of the flags continuation (see below).
-enum FlagsMode { kFlags_none = 0, kFlags_branch = 1, kFlags_set = 2 };
+enum FlagsMode {
+  kFlags_none = 0,
+  kFlags_branch = 1,
+  kFlags_deoptimize = 2,
+  kFlags_set = 3
+};
 
 std::ostream& operator<<(std::ostream& os, const FlagsMode& fm);