re PR tree-optimization/40570 (ICE with recursion at -O3)

2009-07-30  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/40570
	* ipa-inline.c (cgraph_decide_inlining): Watch out for dead single
	use inlining loops.

	* testsuite/gcc.c-torture/compile/pr40570.c: New test.

From-SVN: r150263

gcc/ChangeLog

+2009-07-30  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/40570
+	* ipa-inline.c (cgraph_decide_inlining): Watch out for dead single
+	use inlining loops.
+
 2009-07-30  Razya Ladelsky <razya@il.ibm.com>
 
 	* ssa-loop-manip.c: Include langhooks.h.

gcc/ipa-inline.c

@@ -1227,6 +1227,8 @@ cgraph_decide_inlining (void)
 	      && !node->needed
 	      && node->local.inlinable
 	      && node->callers->inline_failed
+	      && node->callers->caller != node
+	      && node->callers->caller->global.inlined_to != node
 	      && !gimple_call_cannot_inline_p (node->callers->call_stmt)
 	      && !DECL_EXTERNAL (node->decl)
 	      && !DECL_COMDAT (node->decl))

gcc/testsuite/ChangeLog

+2009-07-30  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/40570
+	* gcc.c-torture/compile/pr40570.c: New test.
+
 2009-07-29  Jason Merrill  <jason@redhat.com>
 
 	PR c++/14912

gcc/testsuite/gcc.c-torture/compile/pr40570.c

+extern void anything(int);
+
+static int foo(int i);
+
+static int bar(int i) { foo(i); }
+
+extern int j;
+
+static int foo(int i)
+{
+  if (j)
+    anything(j);
+  return bar(i);
+}
+
+int baz()
+{
+  foo(0);
+  if (baz())
+    return 1;
+  return 0;
+}