PR bootstrap/43767

[pf3gnuchains/gcc-fork.git] / gcc / alias.c

diff --git a/gcc/alias.c b/gcc/alias.c
index 6ec51ec..a1e12fb 100644 (file)
--- a/gcc/alias.c
+++ b/gcc/alias.c
@@ -1792,10 +1792,11 @@ memrefs_conflict_p (int xsize, rtx x, int ysize, rtx y, HOST_WIDE_INT c)
     {
       if (REG_P (y))
        {
-         struct elt_loc_list *l;
-         for (l = CSELIB_VAL_PTR (x)->locs; l; l = l->next)
-           if (REG_P (l->loc) && rtx_equal_for_memref_p (l->loc, y))
-             break;
+         struct elt_loc_list *l = NULL;
+         if (CSELIB_VAL_PTR (x))
+           for (l = CSELIB_VAL_PTR (x)->locs; l; l = l->next)
+             if (REG_P (l->loc) && rtx_equal_for_memref_p (l->loc, y))
+               break;
          if (l)
            x = y;
          else
@@ -1809,10 +1810,11 @@ memrefs_conflict_p (int xsize, rtx x, int ysize, rtx y, HOST_WIDE_INT c)
     {
       if (REG_P (x))
        {
-         struct elt_loc_list *l;
-         for (l = CSELIB_VAL_PTR (y)->locs; l; l = l->next)
-           if (REG_P (l->loc) && rtx_equal_for_memref_p (l->loc, x))
-             break;
+         struct elt_loc_list *l = NULL;
+         if (CSELIB_VAL_PTR (y))
+           for (l = CSELIB_VAL_PTR (y)->locs; l; l = l->next)
+             if (REG_P (l->loc) && rtx_equal_for_memref_p (l->loc, x))
+               break;
          if (l)
            y = x;
          else