Add test about bus error generated in sparc compiler

tests/test/cg/tbuserror.pp

@@ -0,0 +1,59 @@
+
+{ This test was created to check
+  a code generation problem on sparc CPU
+  in which OS_32 LD/ST operations were
+  used on memory not aligned on a 4-byte
+  boundary, leading to BUS error at execution.
+  The test execution also checks that the value
+  parameter changes are not passed back
+  to the original variable in calling code. }
+
+type
+  trec = record
+    w1 : word;
+    b1 : boolean;
+    b2 : byte;
+  end;
+
+  trec2 = record
+    b3 : boolean;
+    rec : trec;
+  end;
+
+const
+  const_b2 = 45;
+  const_w1 = 23456;
+  count : integer = 0;
+
+procedure check_trec(tr : trec);
+
+begin
+  if not tr.b1 or (tr.b2<>const_b2) or (tr.w1<>const_w1) then
+    begin
+      writeln('Wrong value passed to check_trec');
+      halt(1);
+    end
+  else
+    begin
+      writeln(count,': check_rec ok');
+    end;
+  inc(tr.b2);
+  dec(tr.w1);
+  inc(count);
+end;
+
+var
+  tr : trec;
+  tr2 : trec2;
+
+begin
+  tr.b1:=true;
+  tr.b2:=const_b2;
+  tr.w1:=const_w1;
+  check_trec(tr);
+  check_trec(tr);
+  tr2.b3:=true;
+  tr2.rec:=tr;
+  check_trec(tr2.rec);
+  check_trec(tr2.rec);
+end.