From: Aldy Hernandez <aldyh@redhat.com>
Date: Mon, 3 Aug 2020 16:30:30 +0000 (+0200)
Subject: Avoid shifting by amounts larger than target int in irange self-tests.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6c4763fa5b55f6e883ed7077b67c6175c2da63d1;p=gcc.git

Avoid shifting by amounts larger than target int in irange self-tests.

gcc/ChangeLog:

	PR tree-optimization/96430
	* range-op.cc (operator_tests): Do not shift by 31 on targets with
	integer's smaller than 32 bits.
---

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index c62e3977ce5..b7b708b488b 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -3527,15 +3527,16 @@ operator_tests ()
   }
 
   // signed: ~[-1] = OP1 >> 31
-  {
-    widest_irange lhs (INT (-1), INT (-1), VR_ANTI_RANGE);
-    widest_irange shift (INT (31), INT (31));
-    widest_irange op1;
-    op_rshift.op1_range (op1, integer_type_node, lhs, shift);
-    widest_irange negatives = range_negatives (integer_type_node);
-    negatives.intersect (op1);
-    ASSERT_TRUE (negatives.undefined_p ());
-  }
+  if (TYPE_PRECISION (integer_type_node) > 31)
+    {
+      widest_irange lhs (INT (-1), INT (-1), VR_ANTI_RANGE);
+      widest_irange shift (INT (31), INT (31));
+      widest_irange op1;
+      op_rshift.op1_range (op1, integer_type_node, lhs, shift);
+      widest_irange negatives = range_negatives (integer_type_node);
+      negatives.intersect (op1);
+      ASSERT_TRUE (negatives.undefined_p ());
+    }
 }
 
 // Run all of the selftests within this file.