Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 85 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/flatten-2.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/flatten-2.c
new file mode 100644
index 000000000..ffed23cf4
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/flatten-2.c
@@ -0,0 +1,85 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-early-inlining" } */
+
+extern void do_something_usefull();
+/* Check that we finish compiling even if instructed to
+   flatten a cyclic callgraph.  Verify we correctly
+   flatten with another function marked flatten in the
+   callgraph. 
+
+   Main inline is cureful about indirect calls giving
+   precedence to breaking cycle at indirect call sites.
+   Early inliner can't do similar analysis, so we need
+   to disable it if we want cycles to be broken consistently.  */
+
+void __attribute__((flatten)) direct(void)
+{
+  direct();
+}
+
+
+void __attribute__((flatten)) indirect(void);
+static void indirect1(void)
+{
+  indirect();
+}
+void __attribute__((flatten)) indirect(void)
+{
+  indirect1();
+}
+
+
+void __attribute__((flatten)) doubleindirect(void);
+static void doubleindirect2(void)
+{
+  doubleindirect();
+  do_something_usefull ();
+}
+static void doubleindirect1(void)
+{
+  doubleindirect2();
+}
+void __attribute__((flatten)) doubleindirect(void)
+{
+  doubleindirect1();
+}
+
+
+static void subcycle1(void);
+static void subcycle2(void)
+{
+  subcycle1();
+  do_something_usefull ();
+}
+static void subcycle1(void)
+{
+  subcycle2();
+}
+void __attribute__((flatten)) subcycle(void)
+{
+  subcycle1();
+}
+
+
+static void doublesubcycle1(void);
+static void doublesubcycle2(void);
+static void doublesubcycle3(void)
+{
+  doublesubcycle1();
+  do_something_usefull ();
+}
+static void doublesubcycle2(void)
+{
+  doublesubcycle3();
+}
+static void doublesubcycle1(void)
+{
+  doublesubcycle2();
+}
+void __attribute__((flatten)) doublesubcycle(void)
+{
+  doublesubcycle1();
+}
+
+/* { dg-final { scan-assembler "cycle\[123\]\[: \t\n\]" } } */
+/* { dg-final { scan-assembler-not "indirect\[12\]\[: \t\n\]" } } */