[gcc r13-6878] tree-optimization/108357 - add testcase

[Richard Biener <rguenth@gcc.gnu.org>]

https://gcc.gnu.org/g:ce4a00e29c71f2f51d52f407ecd265fa40688586

commit r13-6878-gce4a00e29c71f2f51d52f407ecd265fa40688586
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Mar 27 14:22:56 2023 +0200

    tree-optimization/108357 - add testcase
    
    The following adds the testcase for the bug which was recently
    fixed.
    
            PR tree-optimization/108357
            * gcc.dg/tree-ssa/pr108357.c: New testcase.

Diff:
---
 gcc/testsuite/gcc.dg/tree-ssa/pr108357.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr108357.c b/gcc/testsuite/gcc.dg/tree-ssa/pr108357.c
new file mode 100644
index 00000000000..44c457b7a97
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr108357.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-threadfull1" } */
+
+static char b;
+static unsigned c;
+void foo();
+short(a)(short d, short e) { return d * e; }
+static short f(short d) {
+  b = 0;
+  if ((d && 0 >= c < d) ^ d)
+    ;
+  else
+    foo();
+  return d;
+}
+int main()
+{
+  short g = a(5, b ^ 9854);
+  f(g);
+}
+
+/* { dg-final { scan-tree-dump-not "foo" "threadfull1" } } */