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[Bug target/66822] Turn off X86_TUNE_ZERO_EXTEND_WITH_AND for -miamcu
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 09 Jul 2015 18:09:43 +0000
- Subject: [Bug target/66822] Turn off X86_TUNE_ZERO_EXTEND_WITH_AND for -miamcu
- Auto-submitted: auto-generated
- References: <bug-66822-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66822
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Yulia Koval from comment #1)
> I think it's a good idea.
If we do that, we may also adjust iamcu_cost:
COSTS_N_INSNS (3), /* cost of movsx */
COSTS_N_INSNS (2), /* cost of movzx */