fixed bug #635354

[fw/sdcc] / src / mcs51 / gen.c

diff --git a/src/mcs51/gen.c b/src/mcs51/gen.c
index 6dcefa60726362697c362fda1e4766227cdf297d..529be381c2aeb3542a8c2f7e2680e27ca8104c27 100644 (file)
--- a/src/mcs51/gen.c
+++ b/src/mcs51/gen.c
@@ -230,17 +230,26 @@ getFreePtr (iCode * ic, asmop ** aopp, bool result)
       (*aopp)->type = AOP_R1;
       return mcs51_regWithIdx (R1_IDX);
     }
-
 endOfWorld:
-  /* I said end of world but not quite end of world yet */
-  /* if this is a result then we can push it on the stack */
-  if (result)
-    {
-      (*aopp)->type = AOP_STK;
-      return NULL;
+  /* I said end of world, but not quite end of world yet */
+  if (result) {
+    /* we can push it on the stack */
+    (*aopp)->type = AOP_STK;
+    return NULL;
+  } else {
+    /* in the case that result AND left AND right needs a pointer reg
+       we can safely use the result's */
+    if (bitVectBitValue (mcs51_rUmaskForOp(IC_RESULT(ic)), R0_IDX)) {
+      (*aopp)->type = AOP_R0;
+      return mcs51_regWithIdx (R0_IDX);
     }
+    if (bitVectBitValue (mcs51_rUmaskForOp(IC_RESULT(ic)), R1_IDX)) {
+      (*aopp)->type = AOP_R1;
+      return mcs51_regWithIdx (R1_IDX);
+    }
+  }
 
-  /* other wise this is true end of the world */
+  /* now this is REALLY the end of the world */
   werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
          "getFreePtr should never reach here");
   exit (1);
@@ -8879,7 +8888,7 @@ gen51Code (iCode * lic)
   lineHead = lineCurr = NULL;
 
   /* print the allocation information */
-  if (allocInfo)
+  if (allocInfo && currFunc)
     printAllocInfo (currFunc, codeOutFile);
   /* if debug information required */
   if (options.debug && currFunc)
@@ -8919,7 +8928,15 @@ gen51Code (iCode * lic)
          cln = ic->lineno;
        }
       if (options.iCodeInAsm) {
-       emitcode("", ";ic:%d: %s", ic->key, printILine(ic));
+       char regsInUse[80];
+       int i;
+
+       for (i=0; i<8; i++) {
+         sprintf (&regsInUse[i],
+                  "%c", ic->riu & (1<<i) ? i+'0' : '-'); 
+       }
+       regsInUse[i]=0;
+       emitcode("", "; [%s] ic:%d: %s", regsInUse, ic->seq, printILine(ic));
       }
       /* if the result is marked as
          spilt and rematerializable or code for