* x86_64: reworked register saving/restoring to use PUSH/POP instructions for procedures with RSP-based frame and SEH finalization procedures. XMM registers are also saved/restored without involving tempgen in mentioned cases. This prevents SEH finalization procedures from saving registers in stack frame of their parent procedures, fixing incorrect unwind bytecode (Mantis #24791). It also reduces executable size (for compiler itself, by about 100Kb).


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25389 3ad0048d-3df7-0310-abae-a5850022a9f2