[Bug rtl-optimization/58295] [4.8/4.9 regression] Missed zero-extension elimination in the combiner

[npickito at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58295

Kito Cheng <npickito at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |npickito at gmail dot com

--- Comment #10 from Kito Cheng <npickito at gmail dot com> ---
So why don't reject it at
TARGET_LEGITIMATE_COMBINED_INSN/ix86_legitimate_combined_insn
instead of limit at combine phase if it's only benefit for x86 ?