Reland of [ignition/turbo] Perform liveness analysis on the bytecodes

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index bc54145950043cd6398505ea53a069db5419b8d3..05c0afe8f6bacd2ea33142eeee53d78c38762f6f 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -471,6 +471,12 @@ class V8_EXPORT_PRIVATE Bytecodes final {
            IsConditionalJumpConstant(bytecode);
   }
 
+  // Returns true if the bytecode is an unconditional jump.
+  static CONSTEXPR bool IsUnconditionalJump(Bytecode bytecode) {
+    return bytecode == Bytecode::kJump || bytecode == Bytecode::kJumpConstant ||
+           bytecode == Bytecode::kJumpLoop;
+  }
+
   // Returns true if the bytecode is a jump or a conditional jump taking
   // an immediate byte operand (OperandType::kImm).
   static CONSTEXPR bool IsJumpImmediate(Bytecode bytecode) {
@@ -500,6 +506,12 @@ class V8_EXPORT_PRIVATE Bytecodes final {
     return IsJumpImmediate(bytecode) || IsJumpConstant(bytecode);
   }
 
+  // Returns true if the bytecode is a forward jump or conditional jump taking
+  // any kind of operand.
+  static CONSTEXPR bool IsForwardJump(Bytecode bytecode) {
+    return bytecode != Bytecode::kJumpLoop && IsJump(bytecode);
+  }
+
   // Returns true if the bytecode is a conditional jump, a jump, or a return.
   static CONSTEXPR bool IsJumpOrReturn(Bytecode bytecode) {
     return bytecode == Bytecode::kReturn || IsJump(bytecode);