From 64ff162e3f02d62a3d06a83dda30b3f90b51ecfe Mon Sep 17 00:00:00 2001
From: florian <florian@freepascal.org>
Date: Mon, 12 Oct 2020 19:43:24 +0000
Subject: [PATCH]   * patch by Christo Crause: r0, r1 are no volatile registers
 for avr tiny

git-svn-id: trunk@47102 -
(cherry picked from commit b8c707ed7ec518f89df8d3853615a2b556b2fd78)
---
 compiler/avr/cpupara.pas | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/avr/cpupara.pas b/compiler/avr/cpupara.pas
index ede8af0cb1..9519a74b2a 100644
--- a/compiler/avr/cpupara.pas
+++ b/compiler/avr/cpupara.pas
@@ -58,7 +58,7 @@ unit cpupara;
     function tcpuparamanager.get_volatile_registers_int(calloption : tproccalloption):tcpuregisterset;
       begin
         if CPUAVR_16_REGS in cpu_capabilities[current_settings.cputype] then
-          result:=VOLATILE_INTREGISTERS-[RS_R18,RS_R19]
+          result:=VOLATILE_INTREGISTERS-[RS_R0,RS_R1,RS_R18,RS_R19]
         else
           result:=VOLATILE_INTREGISTERS;
       end;