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* fold-const.c (tree_expr_nonnegative_p): Detect more non-negative cases. testsuite: * g++.old-deja/g++.warn/compare1.C: New test. * gcc.dg/compare4.c: New test. From-SVN: r42365
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.