[PATCH] Remove can_throw_non_call_exceptions special case from operator_div::wi_fold.

[Aldy Hernandez]

As discussed in the PR.  The code makes no difference, so whatever test
we added this special case for has been fixed or is being papered over.
I think we should fix any fall out upstream.

[Unless Andrew can remember why we added this and it still applies.]

Tested on x86-64 Linux.

OK for trunk?

	PR 103451

gcc/ChangeLog:

	* range-op.cc (operator_div::wi_fold): Remove
	can_throw_non_call_exceptions special case.

gcc/testsuite/ChangeLog:

	* gcc.dg/pr103451.c: New test.
---
 gcc/range-op.cc                 |  7 -------
 gcc/testsuite/gcc.dg/pr103451.c | 17 +++++++++++++++++
 2 files changed, 17 insertions(+), 7 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/pr103451.c

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index bbf2924f815..6fe5f1cb4e0 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -1832,13 +1832,6 @@ operator_div::wi_fold (irange &r, tree type,
       return;
     }
 
-  // If flag_non_call_exceptions, we must not eliminate a division by zero.
-  if (cfun->can_throw_non_call_exceptions)
-    {
-      r.set_varying (type);
-      return;
-    }
-
   // If we're definitely dividing by zero, there's nothing to do.
   if (wi_zero_p (type, divisor_min, divisor_max))
     {
diff --git a/gcc/testsuite/gcc.dg/pr103451.c b/gcc/testsuite/gcc.dg/pr103451.c
new file mode 100644
index 00000000000..b83646d0b83
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr103451.c
@@ -0,0 +1,17 @@
+// { dg-do compile }
+// { dg-options "-O2 -w" }
+
+int func_10_ptr_12;
+
+void func_10(long li_8) 
+{
+  long *ptr_9 = &li_8;
+  li_8 &= *ptr_9 / 0 ?: li_8;
+  for (;;)
+    func_10_ptr_12 &= 4 ? *ptr_9 : 4;
+}
+
+void func_9_s_8() 
+{ 
+  func_10(func_9_s_8); 
+}
-- 
2.31.1