[PATCH] D15999: Adding doxygen comments to the LLVM intrinsics (part 2, _wmmintrin_pclmul.h)

[Romanova, Katya via cfe-commits]

I see. I was hoping that if you were, I could have used the same benchmark and compare what build time increase caused by using target attributes (might be much more substantial) and  by adding doxygen comments.

From: Eric Christopher [mailto:echristo at gmail.com]
Sent: Wednesday, January 20, 2016 3:09 PM
To: reviews+D15999+public+772a9901b981d210 at reviews.llvm.org; Romanova, Katya; gribozavr at gmail.com; jonathan at codesourcery.com; Gao, Yunzhong; Sean Silva
Cc: cfe-commits at lists.llvm.org
Subject: Re: [PATCH] D15999: Adding doxygen comments to the LLVM intrinsics (part 2, _wmmintrin_pclmul.h)


On Wed, Jan 20, 2016 at 2:32 PM Katya Romanova via cfe-commits <cfe-commits at lists.llvm.org<mailto:cfe-commits at lists.llvm.org>> wrote:
kromanova added a comment.

In http://reviews.llvm.org/D15999#330794, @silvas wrote:

> This may sound stupid, but: can you benchmark the time it takes to build some project (that actually uses intrinsics in most translation units, e.g. a game) with the headers w/ and w/o the doxygen comments to check that all the extra comment skipping doesn't affect compilation time? I.e. run your script to add the comments for "all" the intrinsic headers (similar to what you expect the final state to be after all these patches) and test the build time of a game (and compare with the unmodified headers).
>
> Also, can you post a patch that changes "all" the headers to have doxygen comments like you intend, so that others can test and verify?


Out of curiosity, do you know if the impact to the build time for Eric's change of starting to use the target attributes instead of conditional inclusion was measured (r239883) on a large scale application. If so, what were the results? I should probably include Eric.

I did not as the feature compatibility was fairly important here. That said, I don't really expect the compile time difference for the comment skipping to matter in any large way and having documentation seems pretty nice.

-eric
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