Unifying the handling of storing and loading from safepoint stack

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 7f93b843d4fbf8846032d4680910153555c15278..91b6651fe03776bb31cbc7ea56c36f9f949e952c 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -1654,6 +1654,28 @@ void MacroAssembler::LoadGlobalFunctionInitialMap(Register function,
 }
 
 
+// Store the value in register src in the safepoint register stack
+// slot for register dst.
+void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Register src) {
+  mov(SafepointRegisterSlot(dst), src);
+}
+
+
+void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Immediate src) {
+  mov(SafepointRegisterSlot(dst), src);
+}
+
+
+void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) {
+  mov(dst, SafepointRegisterSlot(src));
+}
+
+
+Operand MacroAssembler::SafepointRegisterSlot(Register reg) {
+  return Operand(esp, SafepointRegisterStackIndex(reg.code()) * kPointerSize);
+}
+
+
 int MacroAssembler::SafepointRegisterStackIndex(int reg_code) {
   // The registers are pushed starting with the lowest encoding,
   // which means that lowest encodings are furthest away from