From: Richard Guenther <rguenther@suse.de>
Date: Thu, 26 Apr 2007 15:50:32 +0000 (+0000)
Subject: re PR tree-optimization/30567 (-O3 optimizer bug)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=794ed8a5108dd8b1f9d5dc1550432522956c0d3a;p=gcc.git

re PR tree-optimization/30567 (-O3 optimizer bug)

2007-04-26  Richard Guenther  <rguenther@suse.de>
        Daniel Berlin  <dberlin@dberlin.org>

        PR tree-optimization/30567
        * g++.dg/other/pr30567.C: New testcase.

Co-Authored-By: Daniel Berlin <dberlin@dberlin.org>

From-SVN: r124191
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b2db604b467..bcdbbddd3c7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2007-04-26  Richard Guenther  <rguenther@suse.de>
+	Daniel Berlin  <dberlin@dberlin.org>
+
+	PR tree-optimization/30567
+	* g++.dg/other/pr30567.C: New testcase.
+
 2007-04-26  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/31703
diff --git a/gcc/testsuite/g++.dg/other/pr30567.C b/gcc/testsuite/g++.dg/other/pr30567.C
new file mode 100644
index 00000000000..626d27bb386
--- /dev/null
+++ b/gcc/testsuite/g++.dg/other/pr30567.C
@@ -0,0 +1,33 @@
+/* { dg-do run } */
+/* { dg-options "-O -finline-functions -fstrict-aliasing" } */
+
+template <typename T>
+struct const_ref
+{
+  const T* begin;
+  const_ref(const T* b) : begin(b) {}
+};
+
+template <typename T>
+T sum(const_ref<T> const& a)
+{
+  T result = 0;
+  for(unsigned i=0;i<1;i++) result += a.begin[i];
+  return result;
+}
+
+struct tiny_plain
+{
+  int elems[2];
+  tiny_plain() { elems[0]=1; }
+};
+
+struct vec3 : tiny_plain {};
+
+struct mat3
+{
+  int type() const { return sum(const_ref<int>(vec3().elems)) == 1; }
+};
+
+int main() { return mat3().type() ? 0 : 1; }
+