PR middle-end/23584

    * gcc.dg/pr23584.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@104284 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 94ae3be..c74bd24 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2005-09-14  Josh Conner  <jconner@apple.com>
+
+       PR middle-end/23584
+       * gcc.dg/pr23584.c: New test.
+
 2005-09-14  Jerry DeLisle  <jvdelisle@verizon.net>
 
        PR fortran/21875 Internal Unit Array I/O, NIST

diff --git a/gcc/testsuite/gcc.dg/pr23584.c b/gcc/testsuite/gcc.dg/pr23584.c
new file mode 100644 (file)
index 0000000..691a119
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr23584.c
@@ -0,0 +1,21 @@
+/* Regression test for PR middle-end/23584 */
+/* Verify that dereferencing an absolute address inside of a function
+   makes that function impure.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-ipa-pure-const" } */
+
+int test1 (void)
+{
+  return * (volatile int *) 0x1234;
+}
+
+int test2 (void)
+{
+  int local = * (volatile int *) 0x1234;
+  return local;
+}
+
+/* { dg-final { scan-ipa-dump-not "found to be pure: test1" "pure-const" } } */
+/* { dg-final { scan-ipa-dump-not "found to be pure: test2" "pure-const" } } */
+/* { dg-final { cleanup-ipa-dump "pure-const" } } */