94       return VMRegImpl::stack2reg(offset / 4);

    94       VMReg vmReg = VMRegImpl::stack2reg(offset / 4);

    95       if (!OopMapValue::legal_vm_reg_name(vmReg)) {

    96         // This restriction only applies to VMRegs that are used in OopMap but

    97         // since that's the only use of VMRegs it's simplest to put this test

    98         // here.  This test should also be equivalent legal_vm_reg_name but JVMCI

    99         // clients can use max_oop_map_stack_stack_offset to detect this problem

   100         // directly.  The asserts just ensure that the tests are in agreement.

   101         assert(offset > CompilerToVM::Data::max_oop_map_stack_offset(), "illegal VMReg");

   102         JVMCI_ERROR_NULL("stack offset %d is too large to be encoded in OopMap (max %d)",

   103                          offset, CompilerToVM::Data::max_oop_map_stack_offset());

   104       }

   105       assert(OopMapValue::legal_vm_reg_name(vmReg), "illegal VMReg");

   106       return vmReg;