Use kRegisterSize when passing arguments to the C++ runtime for X64

src/x64/deoptimizer-x64.cc

Index: src/x64/deoptimizer-x64.cc
diff --git a/src/x64/deoptimizer-x64.cc b/src/x64/deoptimizer-x64.cc
index ae180ec59b4b5078919a5f8f2659a3de1c5ad7b2..ff9beba586ccaa79cf42b962d7f6a4eede878e97 100644
--- a/src/x64/deoptimizer-x64.cc
+++ b/src/x64/deoptimizer-x64.cc
@@ -156,7 +156,7 @@ void Deoptimizer::EntryGenerator::Generate() {
     __ push(r);
   }
 
-  const int kSavedRegistersAreaSize = kNumberOfRegisters * kPointerSize +
+  const int kSavedRegistersAreaSize = kNumberOfRegisters * kRegisterSize +

[haitao.feng, 2014/01/14 08:40:39]

x32 uses the 64-bit push instruction to save all the registers when
deoptimization happens.

                                       kDoubleRegsSize;
 
   // We use this to keep the value of the fifth argument temporarily.
@@ -169,9 +169,9 @@ void Deoptimizer::EntryGenerator::Generate() {
 
   // Get the address of the location in the code object
   // and compute the fp-to-sp delta in register arg5.
-  __ movq(arg_reg_4,
-          Operand(rsp, kSavedRegistersAreaSize + 1 * kPointerSize));
-  __ lea(arg5, Operand(rsp, kSavedRegistersAreaSize + 2 * kPointerSize));
+  __ movq(arg_reg_4, Operand(rsp, kSavedRegistersAreaSize + 1 * kRegisterSize));

[haitao.feng, 2014/01/14 08:40:39]

x32 uses 64-bit push instruction for the bailout id to reduce the code size of
deoptimization prologue.

+  __ lea(arg5, Operand(rsp, kSavedRegistersAreaSize + 1 * kRegisterSize +
+                            kPCOnStackSize));
 
   __ subq(arg5, rbp);
   __ neg(arg5);
@@ -215,7 +215,7 @@ void Deoptimizer::EntryGenerator::Generate() {
   }
 
   // Remove the bailout id and return address from the stack.
-  __ addq(rsp, Immediate(2 * kPointerSize));
+  __ addq(rsp, Immediate(1 * kRegisterSize + kPCOnStackSize));
 
   // Compute a pointer to the unwinding limit in register rcx; that is
   // the first stack slot not part of the input frame.