r226242 - in /trunk/gcc: ChangeLog c-family/Cha...

[mpolacek@gcc.gnu.org]

Author: mpolacek
Date: Mon Jul 27 12:40:45 2015
New Revision: 226242

URL: https://gcc.gnu.org/viewcvs?rev=226242&root=gcc&view=rev
Log:
	PR c++/66555
	PR c/54979
	* c-common.c (find_array_ref_with_const_idx_r): New function.
	(warn_tautological_cmp): New function.
	* c-common.h (warn_tautological_cmp): Declare.
	* c.opt (Wtautological-compare): New option.

	* c-typeck.c (parser_build_binary_op): Call warn_tautological_cmp.

	* call.c (build_new_op_1): Call warn_tautological_cmp.
	* pt.c (tsubst_copy_and_build): Use sentinel to suppress tautological
	compare warnings.

	* doc/invoke.texi: Document -Wtautological-compare.

	* c-c++-common/Wtautological-compare-1.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/Wtautological-compare-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/c-family/c-common.h
    trunk/gcc/c-family/c.opt
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-typeck.c
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/cp/pt.c
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/cpp0x/decltype-54581.C
    trunk/gcc/testsuite/g++.dg/other/vector-compare.C