MIPS: port Remove the fcontext field from all contexts.

src/mips/macro-assembler-mips.cc

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@@ skipping 3697 matching lines @@
     lw(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX)));
     for (int i = 1; i < context_chain_length; i++) {
       lw(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX)));
     }
   } else {
     // Slot is in the current function context.  Move it into the
     // destination register in case we store into it (the write barrier
     // cannot be allowed to destroy the context in esi).
     Move(dst, cp);
   }
-
-  // We should not have found a 'with' context by walking the context chain
-  // (i.e., the static scope chain and runtime context chain do not agree).
-  // A variable occurring in such a scope should have slot type LOOKUP and
-  // not CONTEXT.
-  if (emit_debug_code()) {

[Kevin Millikin (Chromium), 2011/06/30 08:21:01]

BTW, this debug check was removed from ARM because I couldn't think of a simple
way to do it with only one scratch register---and didn't want to pass in a
scratch register just for debug code.

It's still on IA32 and x64, so maybe you can think of a good way to introduce it
here?

-    lw(t9, MemOperand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX)));
-    Check(eq, "Yo dawg, I heard you liked function contexts "
-              "so I put function contexts in all your contexts",
-               dst, Operand(t9));
-  }
 }
 
 
 void MacroAssembler::LoadGlobalFunction(int index, Register function) {
   // Load the global or builtins object from the current context.
   lw(function, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX)));
   // Load the global context from the global or builtins object.
   lw(function, FieldMemOperand(function,
                                GlobalObject::kGlobalContextOffset));
   // Load the function from the global context.
@@ skipping 502 matching lines @@
        opcode == BGTZL);
   opcode = (cond == eq) ? BEQ : BNE;
   instr = (instr & ~kOpcodeMask) | opcode;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS