When using varargs stack repair, only disable native-code peephole opt in functions containing varargs calls.

There is no need to reduce the optimization in other functions, which will not contain any varargs stack repair code.

Native.pas

@@ -1762,7 +1762,7 @@ var
 begin {GenNative}
 { writeln('GenNative: ',p_opcode:4, ', mode=', ord(p_mode):1,
    ' operand=', p_operand:1);      {debug}
-if npeephole then begin
+if npeephole and not (strictVararg and hasVarargsCall) then begin
    if (nnextspot = 1) and not (p_opcode in nleadOpcodes) then begin
       if p_opcode <> d_end then
          if registers then

Scanner.pas

@@ -2703,7 +2703,7 @@ if ch in ['a','d','e','i','l','p','u','w'] then begin
                      commonSubexpression := odd(val >> 4);
                      loopOptimizations := odd(val >> 5);
                      strictVararg := not odd(val >> 6);
-                     if saveStack or strictVararg then
+                     if saveStack then
                         npeepHole := false;
                      if token.kind <> eolsy then
                         Error(11);