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* cse.c (cse_insn): Call never_reached_warning when a jump is changed to be unconditional. * flags.h: Declare warn_notreached. * flow.c (delete_block): Call never_reached_warning when a block is deleted. * jump.c (delete_barrier_successors): Call never_reached_warning when we delete everything after a BARRIER. (never_reached_warning): New function. * rtl.h: Declare never_reached_warning. * toplev.c (warn_notreached): New variable. (lang_independent_options): Set warn_notreached when -Wunreachable-code. (compile_file): We need line numbers for -Wunreachable-code. Also modify documentation to suit. From-SVN: r28747
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. Check the INSTALL directory for detailed configuration and installation instructions. Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.