Re: [PATCH GCC8][33/33]Fix PR69710/PR68030 by reassociate vect base address and a simple CSE pass

[Michael Meissner <meissner at linux dot vnet dot ibm dot com>]

I was attempting to build a spec 2006 run on a little endian power8 PowerPC
system with all of your patches installed.  I had problems with the dealII
benchmark:

--> ./xgcc -B./ -O2 -S function_lib.ii -ftree-vectorize
function_lib.cc: In member function ‘Tensor<2, dim> Functions::CosineFunction<dim>::hessian(const Point<dim>&, unsigned int) const [with int dim = 3]’:
function_lib.cc:518:3: error: RESULT_DECL should be read only when DECL_BY_REFERENCE is set
while verifying SSA_NAME result_43 in statement
result_43 = result_68 + 16;
function_lib.cc:518:3: internal compiler error: verify_ssa failed
0x10e1535b verify_ssa(bool, bool)
        /home/meissner/fsf-src/ivopts/gcc/tree-ssa.c:1184
0x10a4f9db execute_function_todo
        /home/meissner/fsf-src/ivopts/gcc/passes.c:1973
0x10a506d3 do_per_function
        /home/meissner/fsf-src/ivopts/gcc/passes.c:1650
0x10a50953 execute_todo
        /home/meissner/fsf-src/ivopts/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

I'll attach a bzip2'ed version of the function_lib.ii pre-processed file that I
used to this mail message.

I'll run the other benchmarks and compare it to the baseline version to see
what improvements there are.

-- 
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797

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