fixed bug #444971

[fw/sdcc] / src / ds390 / ralloc.c

diff --git a/src/ds390/ralloc.c b/src/ds390/ralloc.c
index a9a66ceac515e548dd779d637674e6f73ee0d139..c9307ee386f160d783808e269621af4067bbb86e 100644 (file)
--- a/src/ds390/ralloc.c
+++ b/src/ds390/ralloc.c
@@ -1920,6 +1920,16 @@ packRegsForOneuse (iCode * ic, operand * op, eBBlock * ebp)
                         bitVectFirstBit (OP_DEFS (op)))))
     return NULL;
 
+  /* if that only usage is a cast */
+  if (dic->op == CAST) {
+    /* to a bigger type */
+    if (getSize(OP_SYM_TYPE(IC_RESULT(dic))) > 
+       getSize(OP_SYM_TYPE(IC_RIGHT(dic)))) {
+      /* than we can not, since we cannot predict the usage of b & acc */
+      return NULL;
+    }
+  }
+
   /* found the definition now check if it is local */
   if (dic->seq < ebp->fSeq ||
       dic->seq > ebp->lSeq)