builtins.c (expand_builtin_strncmp, [...]): New functions.
* builtins.c (expand_builtin_strncmp, expand_builtin_strncpy): New
functions.
(expand_builtin): Handle BUILT_IN_STRNCPY and BUILT_IN_STRNCMP.
* builtins.def (BUILT_IN_STRNCPY, BUILT_IN_STRNCMP): New entries.
* c-common.c (c_common_nodes_and_builtins): Declare builtin
strncpy and strncmp.
* extend.texi (strncmp, strncpy): Document new builtins.
testsuite:
* gcc.c-torture/execute/string-opt-7.c: New test.
* gcc.c-torture/execute/string-opt-8.c: Likewise.
From-SVN: r37777