[Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70467

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr  1 16:08:21 2016
New Revision: 234679

URL: https://gcc.gnu.org/viewcvs?rev=234679&root=gcc&view=rev
Log:
        PR rtl-optimization/70467
        * config/i386/i386.md (*add<dwi>3_doubleword, *sub<dwi>3_doubleword):
        If low word of the last operand is 0, just emit addition/subtraction
        for the high word.

        * gcc.target/i386/pr70467-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr70467-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog