[llvm-dev] VMOVNTDQ in LLVM

Stephen Canon via llvm-dev
2017-09-28T13:31:26Z

What code did you write where you expected VMOVNTDQ to be generated?

The x86 MOVNT instructions are something of an attractive nuisance. There are
cases where they are beneficial, but those cases are much less common and harder
to characterize than you might expect. LLVM is deliberately conservative about
using MOVNT (IIRC it’s currently only generated if you explicitly ask for it by
using intrinsics).

– Steve

> On Sep 28, 2017, at 9:10 AM, hameeza ahmed via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
>
> Hello, i am using llvm 4.0 i am generating intel avx code. But in code i
dont find VMOVNTDQ instruction. Why is that so? When does this instruction
generated?
>
>
> Please clarify.
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