[Bug bootstrap/48371] New: [4.7 Regression] bootstrap failure

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48371

           Summary: [4.7 Regression] bootstrap failure
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


On Linux/x86, revision171734 failed to bootstrap:

http://gcc.gnu.org/ml/gcc-regression/2011-03/msg00594.html
http://gcc.gnu.org/ml/gcc-regression/2011-03/msg00595.html

../../src-trunk/libiberty/floatformat.c: In function 'floatformat_from_double':
../../src-trunk/libiberty/floatformat.c:699:1: error: insn does not satisfy its
constraints:
(insn 159 157 278 17 (parallel [
            (set (reg:SI 21 xmm0)
                (unsigned_fix:SI (reg/v:DF 22 xmm1 [orig:102 mant ] [102])))
            (use (reg:V2DF 179))
            (clobber (reg:V2DF 23 xmm2))
            (clobber (reg:V2DF 24 xmm3))
        ]) ../../src-trunk/libiberty/floatformat.c:675 115 {*fixuns_truncdf_1}
     (expr_list:REG_EQUAL (unsigned_fix:SI (reg/v:DF 22 xmm1 [orig:102 mant ]
[102]))
        (nil)))
../../src-trunk/libiberty/floatformat.c:699:1: internal compiler error: in
reload_cse_simplify_operands, at postreload.c:403
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Revision 171729 is OK.