[Bug tree-optimization/31625] New: decimal float comparison after conversion no longer folded

[janis at gcc dot gnu dot org]

Test gcc.dg/dfp/convert-dfp-fold.c started failing on powerpc-linux with this
patch:

    http://gcc.gnu.org/viewcvs?view=rev&rev=123719

    r123719 | dnovillo | 2007-04-11 16:14:06 +0000 (Wed, 11 Apr 2007)

The test, which is compiled with -O, converts between decimal and binary
floating types, compares the results against constants, and calls link_error
for miscompares.  All of the values can be represented in both relevant data
types and the original value is known, so the comparisons should always be
folded.

Since the patch above was added, a comparison for a _Decimal128 converted from
double is not folded, and there are calls to __dpd_extenddftd, __dpd_netd2, and
link_error.  Oddly enough, removing almost any other comparison from the test
causes the test to pass, so I wasn't able to come up with a smaller testcase.


-- 
           Summary: decimal float comparison after conversion no longer
                    folded
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31625