[Bug tree-optimization/64746] Loop with nested load/stores is not vectorized using aggressive if-conversion.

[Bug tree-optimization/64746] Loop with nested load/stores is not vectorized using aggressive if-conversion.

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64746

--- Comment #1 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 34548
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34548&action=edit
test-case to reproduce.

Need to compile this test on x86 with option
  -O3 -fopenmp -march=core-avx2

[Bug tree-optimization/64746] Loop with nested load/stores is not vectorized using aggressive if-conversion.

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64746

--- Comment #2 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 34551
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34551&action=edit
proposed patch

Patch to cure vectorization issue.

[Bug tree-optimization/64746] Loop with nested load/stores is not vectorized using aggressive if-conversion.

[ienkovich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64746

--- Comment #3 from ienkovich at gcc dot gnu.org ---
Author: ienkovich
Date: Thu Jan 29 13:52:28 2015
New Revision: 220248

URL: https://gcc.gnu.org/viewcvs?rev=220248&root=gcc&view=rev
Log:
gcc/

    PR tree-optimization/64746
    * tree-if-conv.c (mask_exists): New function.
    (predicate_mem_writes): Save created mask with given size for further
    use.
    (stmt_is_root_of_bool_pattern): Remove argument VAR and store to it.
    (ifcvt_repair_bool_pattern): Collect all statements that are root
    of bool pattern and use iterative algorithm to remove multiple uses
    of predicates, display number of required iterations.

gcc/testsuite/

    PR tree-optimization/64746
    * gcc.target/i386/avx2-vect-aggressive-1.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/avx2-vect-aggressive-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-if-conv.c