Landing: MIPS: Remove gp and sp from callee-saved register list.

Original code review: http://codereview.chromium.org/7740018/
Review URL: http://codereview.chromium.org/7744050

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9020 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/code-stubs-mips.cc

@@ -3693,10 +3693,10 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   // args
 
   // Save callee saved registers on the stack.
-  __ MultiPush((kCalleeSaved | ra.bit()) & ~sp.bit());
+  __ MultiPush(kCalleeSaved | ra.bit());
 
   // Load argv in s0 register.
-  __ lw(s0, MemOperand(sp, kNumCalleeSaved * kPointerSize +
+  __ lw(s0, MemOperand(sp, (kNumCalleeSaved + 1) * kPointerSize +
                            StandardFrameConstants::kCArgsSlotsSize));
 
   // We build an EntryFrame.
@@ -3830,7 +3830,7 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ addiu(sp, sp, -EntryFrameConstants::kCallerFPOffset);
 
   // Restore callee saved registers from the stack.
-  __ MultiPop((kCalleeSaved | ra.bit()) & ~sp.bit());
+  __ MultiPop(kCalleeSaved | ra.bit());
   // Return.
   __ Jump(ra);
 }

src/mips/frames-mips.h

@@ -59,10 +59,10 @@ static const RegList kCalleeSaved =
   // Saved temporaries.
   1 << 16 | 1 << 17 | 1 << 18 | 1 << 19 |
   1 << 20 | 1 << 21 | 1 << 22 | 1 << 23 |
-  // gp, sp, fp.
-  1 << 28 | 1 << 29 | 1 << 30;
+  // fp.
+  1 << 30;
 
-static const int kNumCalleeSaved = 11;
+static const int kNumCalleeSaved = 9;
 
 
 // Number of registers for which space is reserved in safepoints. Must be a