[Headers][X86] Allow MMX/SSE/AVX2/AVX512 integer min/max intrinsics to be used in constexpr

[RKSimon]

Now that #152278 is done, the x86 intrinsics which wrap the integer __builtin_elementwise_max/min builtins can be updated to work with constexpr

_mm_max_epi8  _mm256_max_epi8  _mm256_max_epi8  
_mm_max_epi16 _mm256_max_epi16 _mm256_max_epi16 _mm_max_pi16
_mm_max_epi32 _mm256_max_epi32 _mm256_max_epi32
_mm_max_epi64 _mm256_max_epi64 _mm256_max_epi64

_mm_max_epu8  _mm256_max_epu8  _mm256_max_epu8  
_mm_max_epu16 _mm256_max_epu16 _mm256_max_epu16 _mm_max_pu16
_mm_max_epu32 _mm256_max_epu32 _mm256_max_epu32
_mm_max_epu64 _mm256_max_epu64 _mm256_max_epu64

_mm_min_epi8  _mm256_min_epi8  _mm256_min_epi8  
_mm_min_epi16 _mm256_min_epi16 _mm256_min_epi16 _mm_min_pi16
_mm_min_epi32 _mm256_min_epi32 _mm256_min_epi32
_mm_min_epi64 _mm256_min_epi64 _mm256_min_epi64

_mm_min_epu8  _mm256_min_epu8  _mm256_min_epu8  
_mm_min_epu16 _mm256_min_epu16 _mm256_min_epu16 _mm_min_pu16
_mm_min_epu32 _mm256_min_epu32 _mm256_min_epu32
_mm_min_epu64 _mm256_min_epu64 _mm256_min_epu64

(ignore the AVX512 mask/maskz variants for now)

You can use #152296 for reference

[llvmbot]

@llvm/issue-subscribers-backend-x86

Author: Simon Pilgrim (RKSimon)

Now that #152278 is done, the x86 intrinsics which wrap the integer __builtin_elementwise_max/min builtins can be updated to work with constexpr ``` _mm_max_epi8 _mm256_max_epi8 _mm256_max_epi8 _mm_max_epi16 _mm256_max_epi16 _mm256_max_epi16 _mm_max_pi16 _mm_max_epi32 _mm256_max_epi32 _mm256_max_epi32 _mm_max_epi64 _mm256_max_epi64 _mm256_max_epi64

_mm_max_epu8 _mm256_max_epu8 _mm256_max_epu8
_mm_max_epu16 _mm256_max_epu16 _mm256_max_epu16 _mm_max_pu16
_mm_max_epu32 _mm256_max_epu32 _mm256_max_epu32
_mm_max_epu64 _mm256_max_epu64 _mm256_max_epu64

_mm_min_epi8 _mm256_min_epi8 _mm256_min_epi8
_mm_min_epi16 _mm256_min_epi16 _mm256_min_epi16 _mm_min_pi16
_mm_min_epi32 _mm256_min_epi32 _mm256_min_epi32
_mm_min_epi64 _mm256_min_epi64 _mm256_min_epi64

_mm_min_epu8 _mm256_min_epu8 _mm256_min_epu8
_mm_min_epu16 _mm256_min_epu16 _mm256_min_epu16 _mm_min_pu16
_mm_min_epu32 _mm256_min_epu32 _mm256_min_epu32
_mm_min_epu64 _mm256_min_epu64 _mm256_min_epu64

(ignore the AVX512 mask/maskz variants for now)

You can use https://github.com/llvm/llvm-project/pull/152296 for reference
</details>

[llvmbot]

Hi!

This issue may be a good introductory issue for people new to working on LLVM. If you would like to work on this issue, your first steps are:

1. Check that no other contributor is working on this issue. If someone is assigned to the issue or claimed to be working on it, ping the person. After one week without a response, the assignee may be changed.
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3. Fix the issue locally.
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7. Open a pull request to the upstream repository on GitHub. Detailed instructions can be found in GitHub's documentation. Mention this issue in the description of the pull request.

If you have any further questions about this issue, don't hesitate to ask via a comment in the thread below.

[llvmbot]

@llvm/issue-subscribers-good-first-issue

Author: Simon Pilgrim (RKSimon)

Now that #152278 is done, the x86 intrinsics which wrap the integer __builtin_elementwise_max/min builtins can be updated to work with constexpr ``` _mm_max_epi8 _mm256_max_epi8 _mm256_max_epi8 _mm_max_epi16 _mm256_max_epi16 _mm256_max_epi16 _mm_max_pi16 _mm_max_epi32 _mm256_max_epi32 _mm256_max_epi32 _mm_max_epi64 _mm256_max_epi64 _mm256_max_epi64

_mm_max_epu8 _mm256_max_epu8 _mm256_max_epu8
_mm_max_epu16 _mm256_max_epu16 _mm256_max_epu16 _mm_max_pu16
_mm_max_epu32 _mm256_max_epu32 _mm256_max_epu32
_mm_max_epu64 _mm256_max_epu64 _mm256_max_epu64

_mm_min_epi8 _mm256_min_epi8 _mm256_min_epi8
_mm_min_epi16 _mm256_min_epi16 _mm256_min_epi16 _mm_min_pi16
_mm_min_epi32 _mm256_min_epi32 _mm256_min_epi32
_mm_min_epi64 _mm256_min_epi64 _mm256_min_epi64

_mm_min_epu8 _mm256_min_epu8 _mm256_min_epu8
_mm_min_epu16 _mm256_min_epu16 _mm256_min_epu16 _mm_min_pu16
_mm_min_epu32 _mm256_min_epu32 _mm256_min_epu32
_mm_min_epu64 _mm256_min_epu64 _mm256_min_epu64

(ignore the AVX512 mask/maskz variants for now)

You can use https://github.com/llvm/llvm-project/pull/152296 for reference
</details>

[markbhasawut]

Hi @RKSimon, I can work on this issue. Could you assign this to me?