* config/microblaze/microblaze.h (CC1_SPEC): Remove %{save-temps: }.

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-sccvn.c

diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index 6efb245..970f2c0 100644 (file)
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -1339,6 +1339,7 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_)
       size2 = TREE_INT_CST_LOW (gimple_call_arg (def_stmt, 2)) * 8;
       if ((unsigned HOST_WIDE_INT)size2 / 8
          == TREE_INT_CST_LOW (gimple_call_arg (def_stmt, 2))
+         && maxsize2 != -1
          && operand_equal_p (base, base2, 0)
          && offset2 <= offset
          && offset2 + size2 >= offset + maxsize)
@@ -1362,7 +1363,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_)
       HOST_WIDE_INT offset2, size2, maxsize2;
       base2 = get_ref_base_and_extent (gimple_assign_lhs (def_stmt),
                                       &offset2, &size2, &maxsize2);
-      if (operand_equal_p (base, base2, 0)
+      if (maxsize2 != -1
+         && operand_equal_p (base, base2, 0)
          && offset2 <= offset
          && offset2 + size2 >= offset + maxsize)
        {
@@ -1383,7 +1385,7 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_)
               || handled_component_p (gimple_assign_rhs1 (def_stmt))))
     {
       tree base2;
-      HOST_WIDE_INT offset2, size2;
+      HOST_WIDE_INT offset2, size2, maxsize2;
       int i, j;
       VEC (vn_reference_op_s, heap) *rhs = NULL;
       vn_reference_op_t vro;
@@ -1396,8 +1398,9 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_)
       base2 = ao_ref_base (&lhs_ref);
       offset2 = lhs_ref.offset;
       size2 = lhs_ref.size;
-      if ((base != base2
-          && !operand_equal_p (base, base2, 0))
+      maxsize2 = lhs_ref.max_size;
+      if (maxsize2 == -1
+         || (base != base2 && !operand_equal_p (base, base2, 0))
          || offset2 > offset
          || offset2 + size2 < offset + maxsize)
        return (void *)-1;