MIPS: Branch delay slot and other optimizations.

src/mips/ic-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 494 matching lines @@
   // Get the receiver of the function from the stack.
   __ lw(a3, MemOperand(sp, argc*kPointerSize));
 
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
     // Push the receiver and the name of the function.
     __ Push(a3, a2);
 
     // Call the entry.
-    __ li(a0, Operand(2));
-    __ li(a1, Operand(ExternalReference(IC_Utility(id), isolate)));
+    __ PrepareCEntryArgs(2);
+    __ PrepareCEntryFunction(ExternalReference(IC_Utility(id), isolate));
 
     CEntryStub stub(1);
     __ CallStub(&stub);
 
     // Move result to a1 and leave the internal frame.
     __ mov(a1, v0);
   }
 
   // Check if the receiver is a global object of some sort.
   // This can happen only for regular CallIC but not KeyedCallIC.
@@ skipping 310 matching lines @@
 
 void KeyedLoadIC::GenerateNonStrictArguments(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- lr     : return address
   //  -- a0     : key
   //  -- a1     : receiver
   // -----------------------------------
   Label slow, notin;
   MemOperand mapped_location =
       GenerateMappedArgumentsLookup(masm, a1, a0, a2, a3, t0, &notin, &slow);
+  __ Ret(USE_DELAY_SLOT);
   __ lw(v0, mapped_location);
-  __ Ret();
   __ bind(&notin);
   // The unmapped lookup expects that the parameter map is in a2.
   MemOperand unmapped_location =
       GenerateUnmappedArgumentsLookup(masm, a0, a2, a3, &slow);
   __ lw(a2, unmapped_location);
   __ LoadRoot(a3, Heap::kTheHoleValueRootIndex);
   __ Branch(&slow, eq, a2, Operand(a3));
+  __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a2);
-  __ Ret();
   __ bind(&slow);
   GenerateMiss(masm, false);
 }
 
 
 void KeyedStoreIC::GenerateNonStrictArguments(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- a0     : value
   //  -- a1     : key
   //  -- a2     : receiver
@@ skipping 884 matching lines @@
     Register reg = Register::from_code(Assembler::GetRs(instr_at_patch));
     patcher.masm()->andi(at, reg, kSmiTagMask);
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS