* tree-ssa-threadedge.c (thread_across_edge): Fix initialization
        of 'found'.

        * gcc.c-torture/compile/pr58340.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@202379 138bc75d-0d04-0410-961f-82ee72b054a4
Assertion.