src/cpu/x86/vm/globals_x86.hpp

rev 7386 : 8068945: Use RBP register as proper frame pointer in JIT compiled code on x86
Summary: Introduce the PreserveFramePointer flag to control if RBP is used as the frame pointer or as a general purpose register.
Reviewed-by: kvn, roland, dlong, enevill, shade

*** 80,89 ****
--- 80,91 ----
  // GC Ergo Flags
  define_pd_global(uintx, CMSYoungGenPerWorker, 64*M);  // default max size of CMS young gen, per GC worker thread
  
  define_pd_global(uintx, TypeProfileLevel, 111);
  
+ define_pd_global(bool, PreserveFramePointer, false);
+ 
  #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
                                                                              \
    develop(bool, IEEEPrecision, true,                                        \
            "Enables IEEE precision (for INTEL only)")                        \
                                                                              \