src/cpu/x86/vm/runtime_x86_32.cpp

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

*** 124,137 ****
    __ addptr(rsp, return_off * wordSize);   // Epilog!
    __ pop(rdx); // Exception pc
  
    // rax: exception handler for given <exception oop/exception pc>
  
-   // Restore SP from BP if the exception PC is a MethodHandle call site.
-   __ cmpl(Address(rcx, JavaThread::is_method_handle_return_offset()), 0);
-   __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save);
- 
    // We have a handler in rax, (could be deopt blob)
    // rdx - throwing pc, deopt blob will need it.
  
    __ push(rax);
  
--- 124,133 ----