[Bug tree-optimization/58453] Revision 202431 results in miscompare for CPU2006 434.zeusmp

[pthaugen at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58453

--- Comment #1 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
Created attachment 30841
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30841&action=edit
Source file

pdv.f source file from benchmark, which results in successful execution if
compiled with prior revision (r202429).

Should have noted in prior comment, compile options used when building the
benchmark are:

-m64 -O3 -mcpu=power7 -fno-tree-loop-distribution -fno-tree-vectorize

(Note that failure still exists for just "-m64 -O3 -mcpu=power7" other 2
options were just included while trying to narrow down dumps/assembler for
debugging.)


Compiling with -fno-tree-loop-distribute-patterns results in benchmark success.