Fixed problems with OptPrecalc. It removed insns because it results were known

- but the insns generate a carry which may be needed later.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4115 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/cc65/coptind.c

@@ -1880,9 +1880,7 @@ unsigned OptPrecalc (CodeSeg* S)
                 }
                 break;
 
-            case OP65_ASL:
             case OP65_EOR:
-            case OP65_LSR:
                 if (RegValIsKnown (Out->RegA)) {
                     /* Accu op zp with known contents */
                     Arg = MakeHexArg (Out->RegA);
@@ -1901,9 +1899,6 @@ unsigned OptPrecalc (CodeSeg* S)
                     /* 0-0 or 0+0 -> remove */
                     CS_DelEntry (S, I);
                     ++Changes;
-                } else if (RegValIsKnown (Out->RegA)) {
-                    /* Accu op zp with known contents */
-                    Arg = MakeHexArg (Out->RegA);
                 }
                 break;