configure.in (--enable-checking): Add fold category.
* configure.in (--enable-checking): Add fold category.
(ENABLE_FOLD_CHECKING): Define if requested.
* configure: Rebuilt.
* config.in: Rebuilt.
* doc/install.texi: Document it.
* fold-const.c: Include md5.h.
[ENABLE_FOLD_CHECKING] (fold): Define to fold_1.
[ENABLE_FOLD_CHECKING] (fold, fold_checksum_tree, fold_check_failed,
print_fold_checksum): New functions.
* fold-const.c (fold): Never modify argument passed to fold, instead
change a copy and return it.
* convert.c (convert_to_integer): Likewise.
testsuite/
* gcc.c-torture/compile/
20030725-1.c: New test.
From-SVN: r69886