[Bug middle-end/34971] bitfield rotates are folded and expanded wrong

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2008-02-27 09:50 -------
Subject: Bug 34971

Author: rguenth
Date: Wed Feb 27 09:50:04 2008
New Revision: 132706

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=132706
Log:
2008-02-27  Richard Guenther  <[EMAIL PROTECTED]>

        PR middle-end/34971
        * expr.c (expand_expr_real_1): Assert on rotates that operate
        on partial modes.
        * fold-const.c (fold_binary): Use the types precision, not the
        bitsize of the mode if folding rotate expressions.  Build rotates
        only for full modes.

        * gcc.c-torture/execute/pr34971.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr34971.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expr.c
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34971