*** empty log message ***

[fw/sdcc] / src / SDCCloop.c

diff --git a/src/SDCCloop.c b/src/SDCCloop.c
index 7ab87a7ff8277d62140a6b17be62365b2b250715..ef902a31db34666905e4353dd7078146e3d806f9 100644 (file)
--- a/src/SDCCloop.c
+++ b/src/SDCCloop.c
@@ -446,11 +446,21 @@ loopInvariants (region * theLoop, eBBlock ** ebbs, int count)
          int lin, rin;
          cseDef *ivar;
 
-         /* if there are function calls in this block and this
-            is a pointer get, the function could have changed it
-            so skip, ISO-C99 according to David A. Long */
-         if (fCallsInBlock && POINTER_GET(ic)) {
-           continue;
+         /* jwk: TODO this is only needed if the call is between
+            here and the definition, but I am too lazy to do that now */
+
+         /* if there are function calls in this block */
+         if (fCallsInBlock) {
+
+           /* if this is a pointer get */
+           if (POINTER_GET(ic)) {
+             continue;
+           }
+
+           /* if this is an assignment from a global */
+           if (ic->op=='=' && isOperandGlobal(IC_RIGHT(ic))) {
+             continue;
+           }
          }
 
          if (SKIP_IC (ic) || POINTER_SET (ic) || ic->op == IFX)
@@ -1044,7 +1054,7 @@ loopInduction (region * loopReg, eBBlock ** ebbs, int count)
       /* add the induction variable vector to the last
          block in the loop */
       lastBlock->isLastInLoop = 1;
-      lastBlock->linds = indVect;
+      lastBlock->linds = bitVectUnion(lastBlock->linds,indVect);
     }
 
   setToNull ((void **) &indVars);