[Bug optimization/13653] [3.3 regression] -O2 -funroll-loop miscompiles POOMA testcase

[janis187 at us dot ibm dot com]

------- Additional Comments From janis187 at us dot ibm dot com  2004-02-02 16:33 -------
The regression in PR 13653 was introduced or exposed with this patch:

2002-09-08  Jan Hubicka  <jh@suse.cz>

        * emit-rtl.c (set_mem_attributes_minus_bitpos): Fix array_ref
        handling.

        * loop.c (loop_gics_reduce):  Emit addition after.

The regression hunt took place on i686-pc-linux-gnu using the reduced          
test case array_test1_reduced.cpp compiled with "-O2 -funroll-loops",
and sources from mainline.  This hunt was complicated by the fact that         
sources from too early got an ICE, and sources slightly after the 3.3          
branchpoint got syntax errors.

-- 
           What    |Removed                     |Added
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                 CC|                            |jh at suse dot cz


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13653