[Bug middle-end/28473] [4.0/4.1 Regression] with -O, casting result of round(x) to uint64_t produces wrong values for x > INT_MAX

["sayle at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #10 from sayle at gcc dot gnu dot org  2006-07-29 19:07 -------
Subject: Bug 28473

Author: sayle
Date: Sat Jul 29 19:07:40 2006
New Revision: 115812

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115812
Log:

        PR middle-end/28473
        Backport from mainline.
        * convert.c (convert_to_integer): When transforming (T)foo(x) into
        bar(x) check that bar's result type can represent all the values of T.
        * builtins.c (fold_fixed_mathfn): When long and long long are the
        same size, canonicalize llceil*, llfloor*, llround* and llrint*
        functions to their lceil*, lfloor*, lround* and lrint* forms.

        * gcc.dg/fold-convround-1.c: New test case.
        * gcc.dg/builtins-55.c: New test case.


Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.dg/builtins-55.c
    branches/gcc-4_1-branch/gcc/testsuite/gcc.dg/fold-convround-1.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/builtins.c
    branches/gcc-4_1-branch/gcc/convert.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28473