[turbofan] Frame elision for code stubs

src/compiler/instruction.h

Index: src/compiler/instruction.h
diff --git a/src/compiler/instruction.h b/src/compiler/instruction.h
index 7da4c5f55e78034fb50a4347f7d6d0025ece13dd..4f47c90affa8d7485b253545f05958b8445e3c29 100644
--- a/src/compiler/instruction.h
+++ b/src/compiler/instruction.h
@@ -812,6 +812,19 @@ class Instruction final {
            OutputCount() == 0 && TempCount() == 0;
   }
 
+  bool IsDeoptimizeCall() const {
+    return arch_opcode() == ArchOpcode::kArchDeoptimize ||
+           FlagsModeField::decode(opcode()) == kFlags_deoptimize;
+  }
+
+  bool IsJump() const { return arch_opcode() == ArchOpcode::kArchJmp; }
+
+  bool IsBranch() const {
+    return FlagsModeField::decode(opcode()) == kFlags_branch;
+  }
+
+  bool IsRet() const { return arch_opcode() == ArchOpcode::kArchRet; }
+
   enum GapPosition {
     START,
     END,