http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52714
--- Comment #13 from Jeffrey A. Law <law at redhat dot com> --- BTW, compiling with -O2 rather than -O1 makes this problem go away. The problematical sequence (testing that the result of an alloca call is nonzero) is eliminated by the VRP optimizers which only run at -O2 and above.
