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* generate no exit code at all on x86-64 if the subroutine is compiled with po_noreturn

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florian 2021-12-03 23:25:45 +01:00
parent e65b822a0c
commit 0b3fb55c6a
1 changed files with 6 additions and 0 deletions
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6
compiler/x86_64/cgcpu.pas
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@ -369,6 +369,12 @@ unit cgcpu;
r : longint; r : longint;
regs_to_save_mm: tcpuregisterarray; regs_to_save_mm: tcpuregisterarray;
begin begin
{ if a subroutine is marked as non-returning, we do
not generate any exit code, so we really trust the noreturn directive
}
if po_noreturn in current_procinfo.procdef.procoptions then
exit;
regs_to_save_mm:=paramanager.get_saved_registers_mm(current_procinfo.procdef.proccalloption); regs_to_save_mm:=paramanager.get_saved_registers_mm(current_procinfo.procdef.proccalloption);
{ Prevent return address from a possible call from ending up in the epilogue } { Prevent return address from a possible call from ending up in the epilogue }
{ (restoring registers happens before epilogue, providing necessary padding) } { (restoring registers happens before epilogue, providing necessary padding) }