Updating SVN tree U libgcc/ChangeLog U libgcc/config/i386/shadow-stack-unwind.h U gcc/doc/extend.texi U gcc/tree-ssa-strlen.c U gcc/ChangeLog U gcc/testsuite/gcc.c-torture/compile/pr86636.c U gcc/testsuite/ChangeLog A gcc/testsuite/g++.dg/pr86696.C Updated to revision 263034. Adjusting file timestamps