[Bug tree-optimization/51492] vectorizer does not support saturated arithmetic patterns

[drepper.fsp at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51492

--- Comment #2 from Ulrich Drepper <drepper.fsp at gmail dot com> 2012-01-08 18:56:48 UTC ---
Note, this code appears in gzip and therefore IIRC in specCPU (in
deflate.c:fill_window).  Although when compiling gzip myself with that code
embedded in a larger function I cannot get the optimization to apply at all.

If this bug is fixed and the optimization is applied the spec numbers could go
up if specCPUis testing unzipping...