From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 3 Jan 2007 08:04:11 +0000 (+0100)
Subject: re PR middle-end/30286 (Segfault with -O2 -ftrapv)
X-Git-Tag: releases/gcc-4.3.0~7735
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=900f1ea9fa0bd800b1e9d8ee9dfc1f919bf1c4cf;p=thirdparty%2Fgcc.git

re PR middle-end/30286 (Segfault with -O2 -ftrapv)

	PR middle-end/30286
	* gcc.dg/pr30286.c: New test.

From-SVN: r120387
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 88a0b3483095..66adf9be9149 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2007-01-03  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/30286
+	* gcc.dg/pr30286.c: New test.
+
 	PR c++/29535
 	* g++.dg/template/crash66.C: New test.
 
diff --git a/gcc/testsuite/gcc.dg/pr30286.c b/gcc/testsuite/gcc.dg/pr30286.c
new file mode 100644
index 000000000000..9ec49b4231ad
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr30286.c
@@ -0,0 +1,37 @@
+/* PR middle-end/30286 */
+/* { dg-do run } */
+/* { dg-options "-O2 -ftrapv" } */
+
+extern void abort (void);
+struct S { struct S *s; };
+struct T { struct S *t[25]; };
+
+void
+__attribute__((noinline))
+foo (int i, struct T *x, struct S *y)
+{
+  int j;
+  for (j = 14; j > i; j--)
+    x->t[j] = y->s;
+}
+
+int
+main (void)
+{
+  struct S s;
+  struct T t;
+  int i;
+
+  s.s = &s;
+  __builtin_memset (&t, 0, sizeof (t));
+  foo (6, &t, &s);
+  for (i = 0; i < 25; i++)
+    if (t.t[i] != ((i > 6 && i <= 14) ? &s : (struct S *) 0))
+      abort ();
+  __builtin_memset (&t, 0, sizeof (t));
+  foo (-1, &t, &s);
+  for (i = 0; i < 25; i++)
+    if (t.t[i] != ((i >= 0 && i <= 14) ? &s : (struct S *) 0))
+      abort ();
+  return 0;
+}