[Bug target/57927] -march=core-avx2 different than -march=native on INTEL Haswell (i7-4700K)

[shadow at umbrox dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57927

Christian Widmer <shadow at umbrox dot de> changed:

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--- Comment #4 from Christian Widmer <shadow at umbrox dot de> ---
Created attachment 30703
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30703&action=edit
Patch to add Ivy Bridge/Haswell detection

Here is a short patch adding Ivy Bridge and Haswell detection. Because Ivy
Bridge does not support AVX2 it differs a bit from the suggestion above.