* src/hc08/gen.c (genPointerSet, genFarPointerSet): moved code from

[fw/sdcc] / src / hc08 / ralloc.c

diff --git a/src/hc08/ralloc.c b/src/hc08/ralloc.c
index 382c2edeac9da19d1e9f5d6da4cae74d5793e868..975f1469233cb5ffc8dc8b900084bb32ae304adf 100644 (file)
--- a/src/hc08/ralloc.c
+++ b/src/hc08/ralloc.c
@@ -2892,6 +2892,20 @@ packRegisters (eBBlock ** ebpp, int blockno)
          continue;
        }
 
+      /* if the condition of an if instruction
+         is defined in the previous GET_POINTER instruction and
+        this is the only usage then
+         mark the itemp as accumulator use */
+      if ((POINTER_GET (ic) && getSize (operandType (IC_RESULT (ic))) <=1) &&
+          ic->next && ic->next->op == IFX &&
+          bitVectnBitsOn (OP_USES(IC_RESULT(ic)))==1 &&
+          isOperandEqual (IC_RESULT (ic), IC_COND (ic->next)) &&
+          OP_SYMBOL (IC_RESULT (ic))->liveTo <= ic->next->seq)
+        {
+          OP_SYMBOL (IC_RESULT (ic))->accuse = 1;
+          continue;
+        }
+
       /* reduce for support function calls */
       if (ic->supportRtn || (ic->op != IFX && ic->op != JUMPTABLE))
        packRegsForSupport (ic, ebp);
@@ -3011,6 +3025,7 @@ packRegisters (eBBlock ** ebpp, int blockno)
           || ic->op == LEFT_OP || ic->op == RIGHT_OP || ic->op == CALL
           || (ic->op == ADDRESS_OF && isOperandOnStack (IC_LEFT (ic)))
            || ic->op == RECEIVE
+           || POINTER_GET (ic)
          ) &&
          IS_ITEMP (IC_RESULT (ic)) &&
          getSize (operandType (IC_RESULT (ic))) <= 1)