[gcc r9-9154] Fix PR testsuite/90806 on the 9 branch

[Eric Botcazou]

https://gcc.gnu.org/g:9c7a3bf73df4581c8ea9a4db507c290524e91cd5

commit r9-9154-g9c7a3bf73df4581c8ea9a4db507c290524e91cd5
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Wed Jan 6 12:06:41 2021 +0100

    Fix PR testsuite/90806 on the 9 branch
    
    gcc/ChangeLog:
            PR testsuite/90806
            Backport from mainline
                2019-07-10  Marc Glisse  <marc.glisse@inria.fr>
    
            * wide-int.h (wi::lshift): Reject negative values for the fast path.

Diff:
---
 gcc/wide-int.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gcc/wide-int.h b/gcc/wide-int.h
index 25ea0545439..77aa01f2c98 100644
--- a/gcc/wide-int.h
+++ b/gcc/wide-int.h
@@ -3032,8 +3032,7 @@ wi::lshift (const T1 &x, const T2 &y)
       if (STATIC_CONSTANT_P (xi.precision > HOST_BITS_PER_WIDE_INT)
 	  ? (STATIC_CONSTANT_P (shift < HOST_BITS_PER_WIDE_INT - 1)
 	     && xi.len == 1
-	     && xi.val[0] <= (HOST_WIDE_INT) ((unsigned HOST_WIDE_INT)
-					      HOST_WIDE_INT_MAX >> shift))
+	     && IN_RANGE (xi.val[0], 0, HOST_WIDE_INT_MAX >> shift))
 	  : precision <= HOST_BITS_PER_WIDE_INT)
 	{
 	  val[0] = xi.ulow () << shift;