[Bug target/65342] [5 Regression] FAIL: gfortran.dg/intrinsic_(un)?pack_1.f90 -O1 execution test on powerpc-apple-darwin9 after r210201

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65342

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-03-07
                 CC|                            |amodra at gmail dot com
     Ever confirmed|0                           |1

--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
Confirmed.  The problem occurs in fwprop1 where instructions corresponding to
the following assembly
    addis r2,r31,ha16(_A.1.1600-L1$pb)
    la r9,lo16(_A.1.1600-L1$pb)(r2)
    ld r2,0(r9)
are combined to
    addis r2,r31,ha16(_A.1.1600-L1$pb)
    la r9,lo16(_A.1.1600-L1$pb)(r2)
    ld r2,lo16(_A.1.1600-L1$pb)(r2)
ie. the offset is propagated into the memory load.  This ought to give you an
error at assembly or link time.  If not, you have a bad assembler or linker..

movdi_low is the culprit, I think.  It should require a suitably aligned offset
(operand 2).