re PR tree-optimization/52009 (Another missed tail merging opportunity)

2012-07-06  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/52009
	* gcc.dg/pr51879-7.c: New test.
	* gcc.dg/pr51879-18.c: New test.

From-SVN: r189322

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a3c9f61fdbd926e9e0631c3071b1bf695ed77fb7..ab552be3bb0de7fb5c4e82184002d9d37745d9be 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2012-07-06  Tom de Vries  <tom@codesourcery.com>
+
+       PR tree-optimization/52009
+       * gcc.dg/pr51879-7.c: New test.
+       * gcc.dg/pr51879-18.c: New test.
+
 2012-07-05  Jason Merrill  <jason@redhat.com>
 
        PR c++/50852

diff --git a/gcc/testsuite/gcc.dg/pr51879-18.c b/gcc/testsuite/gcc.dg/pr51879-18.c
new file mode 100644 (file)
index 0000000..95629f1
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr51879-18.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre -fno-tree-copy-prop -fno-tree-dominator-opts -fno-tree-copyrename" } */
+
+extern int foo (void);
+
+void bar (int c, int *p)
+{
+  int *q = p;
+
+  if (c)
+    *p = foo ();
+  else
+    *q = foo ();
+}
+
+/* { dg-final { scan-tree-dump-times "foo \\(" 1 "pre"} } */
+/* { dg-final { cleanup-tree-dump "pre" } } */

diff --git a/gcc/testsuite/gcc.dg/pr51879-7.c b/gcc/testsuite/gcc.dg/pr51879-7.c
new file mode 100644 (file)
index 0000000..6c1d320
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr51879-7.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre" } */
+
+int bar (int);
+
+int z;
+
+void
+foo (int y)
+{
+  if (y == 6)
+    z = 5;
+  else
+    z = 5;
+}
+
+/* { dg-final { scan-tree-dump-times "z = 5" 1 "pre"} } */
+/* { dg-final { cleanup-tree-dump "pre" } } */