[Bug middle-end/32897] Invalid rematerialisation of subregs

["rsandifo at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #1 from rsandifo at gcc dot gnu dot org  2007-08-16 10:16 -------
Subject: Bug 32897

Author: rsandifo
Date: Thu Aug 16 10:16:15 2007
New Revision: 127536

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=127536
Log:
gcc/
        PR middle-end/32897
        * reload.c (find_reloads): Check that the memory returned by
        find_reloads_toplev was not the result of forcing a constant
        to memory.
        (find_reloads_toplev): Always use simplify_gen_subreg to get
        the subreg of a constant.  If the result is also a constant,
        but not a legitimate one, force it into the constant pool
        and reload its address.

gcc/testsuite/
        * gcc.dg/torture/pr32897.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr32897.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/reload.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32897