[PATCH] Fix sccvn non-integral type handling (PR tree-optimization/65551)

[Jakub Jelinek]

Hi!

This patch fixes
FAIL: 26_numerics/complex/50880.cc execution test
on powerpc64le-linux (and presumably arm*-linux-gnueabi) by basically
reverting the r220390 change for the case when ref->type is not
INTEGRAL_TYPE_P - otherwise TYPE_PRECISION on say complex type or
vector type means very different things than the patch expects.

Bootstrapped/regtested on powercp64le-linux, ok for trunk?

2015-03-26  Jakub Jelinek  <ja...@redhat.com>

        PR tree-optimization/65551
        * tree-ssa-sccvn.c (fully_constant_vn_reference_p): Use
        TYPE_PRECISION only for INTEGRAL_TYPE_P types.

--- gcc/tree-ssa-sccvn.c.jj     2015-02-10 22:58:23.000000000 +0100
+++ gcc/tree-ssa-sccvn.c        2015-03-26 14:41:44.078248811 +0100
@@ -1352,7 +1352,11 @@ fully_constant_vn_reference_p (vn_refere
               || TYPE_PRECISION (ref->type) % BITS_PER_UNIT == 0))
     {
       HOST_WIDE_INT off = 0;
-      HOST_WIDE_INT size = TYPE_PRECISION (ref->type);
+      HOST_WIDE_INT size;
+      if (INTEGRAL_TYPE_P (ref->type))
+       size = TYPE_PRECISION (ref->type);
+      else
+       size = tree_to_shwi (TYPE_SIZE (ref->type));
       if (size % BITS_PER_UNIT != 0
          || size > MAX_BITSIZE_MODE_ANY_MODE)
        return NULL_TREE;

        Jakub