[Bug tree-optimization/92033] ICE during dom with -march=armv8.2-a+sve

[prathamesh3492 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92033

--- Comment #1 from prathamesh3492 at gcc dot gnu.org ---
This seems to happen pretty much for any arithmetic ops inside loop with SVE.
For instance, with cases:

for (int i = 0; i < N; i++)
  dst[i] = ~in1[i];

for (int i = 0; i < N; i++)
  dst[i] = in1[i] + in2[i];

The following workaround "fixes" the issue by punting on POLY_INT_CST in
range_operator::fold_range, but not sure if that's the correct approach.

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index fc31485384b..93eb59436dc 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -148,6 +148,13 @@ range_operator::fold_range (tree type,
   if (empty_range_check (r, lh, rh))
     return r;

+  if (POLY_INT_CST_P (lh.min ()) || POLY_INT_CST_P (lh.max ())
+      || POLY_INT_CST_P (rh.min ()) || POLY_INT_CST_P (rh.max ()))
+    {
+      r.set_varying (lh.type ());
+      return r;
+    }
+
   for (unsigned x = 0; x < lh.num_pairs (); ++x)
     for (unsigned y = 0; y < rh.num_pairs (); ++y)
       {

Thanks,
Prathamesh