From: Richard Biener <rguenther@suse.de>
Date: Tue, 28 Sep 2021 10:48:50 +0000 (+0200)
Subject: tree-optimization/99793 - testcase for the PR
X-Git-Tag: upstream/12.2.0~4778
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=34b1e44e166c58df20a15cb35b6cc8d4d299d415;p=platform%2Fupstream%2Fgcc.git

tree-optimization/99793 - testcase for the PR

This adds a testcase for the PR which was fixed with the fix for
PR100112.

2021-09-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/99793
	* gcc.dg/tree-ssa/pr99793.c: New testcase.
---

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr99793.c b/gcc/testsuite/gcc.dg/tree-ssa/pr99793.c
new file mode 100644
index 0000000..9127449
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr99793.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fstrict-aliasing -fdump-tree-optimized" } */
+
+extern void foo(void);
+static int a, *b = &a, c, *d = &c;
+int main()
+{
+  int **e = &d;
+  if (!((unsigned)((*e = d) == 0) - (*b = 1)))
+    foo();
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "foo" "optimized" } } */