+Mon Nov 12 11:58:26 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
+
+ * alias.c (nonoverlapping_memrefs_p): Only update size from memref
+ if both size and offset known.
+
2001-11-12 David O'Brien <obrien@FreeBSD.org>
* config/ia64/freebsd.h: Fix misspelling.
: MEM_SIZE (rtly) ? INTVAL (MEM_SIZE (rtly)) :
-1);
- /* If we have an offset or size for either memref, it can update the values
- computed above. */
+ /* If we have an offset for either memref, it can update the values computed
+ above. */
if (MEM_OFFSET (x))
offsetx += INTVAL (MEM_OFFSET (x)), sizex -= INTVAL (MEM_OFFSET (x));
if (MEM_OFFSET (y))
offsety += INTVAL (MEM_OFFSET (y)), sizey -= INTVAL (MEM_OFFSET (y));
- if (MEM_SIZE (x))
+ /* If a memref has both a size and an offset, we can use the smaller size.
+ We can't do this is the offset isn't know because we must view this
+ memref as being anywhere inside the DECL's MEM. */
+ if (MEM_SIZE (x) && MEM_OFFSET (x))
sizex = INTVAL (MEM_SIZE (x));
- if (MEM_SIZE (y))
+ if (MEM_SIZE (y) && MEM_OFFSET (y))
sizey = INTVAL (MEM_SIZE (y));
/* Put the values of the memref with the lower offset in X's values. */