[Bug tree-optimization/55968] New: Bytemark HUFFMAN 11% slower with -ftree-vectorize

[wbrana at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55968



             Bug #: 55968

           Summary: Bytemark HUFFMAN 11% slower with -ftree-vectorize

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: tree-optimization

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: wbr...@gmail.com





http://www.tux.org/~mayer/linux/nbench-byte-2.2.3.tar.gz



with -fno-tree-vectorize

HUFFMAN             :            5232  :     145.08  :      46.33

without -fno-tree-vectorize

HUFFMAN             :          4640.9  :     128.69  :      41.10



CFLAGS = -fomit-frame-pointer -Wall -O3 -funroll-loops -g0  -march=corei7

-ffast-math -fno-PIE -fno-exceptions -fno-stack-protector -static

CPU Sandy Bridge