[Interpreter] Pass context to interpreter bytecode handlers and add LoadConstextSlot

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index b228ef9a2850e272487fbe4355941dbf4c769d57..82d5003032e57c94c360fa33466be9efedb17bf5 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -26,6 +26,9 @@ const Register kInterpreterDispatchTableRegister = {kRegister_ebx_Code};
 const Register kRuntimeCallFunctionRegister = {kRegister_ebx_Code};
 const Register kRuntimeCallArgCountRegister = {kRegister_eax_Code};
 
+// Spill slots used by interpreter dispatch calling convention.
+const int kInterpreterContextSpillSlot = -1;
+
 // Convenience for platform-independent signatures.  We do not normally
 // distinguish memory operands from other operands on ia32.
 typedef Operand MemOperand;