[Bug c/48418] [4.6/4.7/4.8 Regression] Bit shift operator >>=

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48418



--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-09 
14:51:17 UTC ---

Author: jakub

Date: Wed Jan  9 14:51:09 2013

New Revision: 195051



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195051

Log:

    PR c/48418

    * c-common.c (c_fully_fold_internal): Warn for LSHIFT_EXPR and

    RSHIFT_EXPR, if orig_op1 isn't INTEGER_CST, op1 is INTEGER_CST

    and is either negative or bigger or equal to type precision

    of the first operand.



    * typeck.c (cp_build_binary_op): For LSHIFT_EXPR and RSHIFT_EXPR,

    call maybe_constant_value for the negative or too big shift

    count warnings.



    * c-c++-common/pr48418.c: New test.



Added:

    trunk/gcc/testsuite/c-c++-common/pr48418.c

Modified:

    trunk/gcc/c-family/ChangeLog

    trunk/gcc/c-family/c-common.c

    trunk/gcc/cp/ChangeLog

    trunk/gcc/cp/typeck.c

    trunk/gcc/testsuite/ChangeLog