Use Clang 3.6's __builtin_assume in Q_ASSUME

It's more efficient than the current implementation. Example:

int f(int i)
{
    Q_ASSUME(i < 8);
    return i < 8;
}

Before:
        cmpl    $8, %edi
        setl    %al
        movzbl  %al, %eax
        retq

After:
        movl    $1, %eax
        retq

Change-Id: I1a800c709d3543699131ffff13c1c50713a8da2c
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

0 files changed, 0 insertions, 0 deletions