[Headers][X86] Allow AVX2/AVX512 broadcast intrinsics to be used in constexpr

[RKSimon]

These all wrap generic shuffles:

_mm_broadcastb_epi8
_mm_broadcastw_epi16
_mm_broadcastd_epi32
_mm_broadcastq_epi64
_mm_broadcastss_ps
_mm_broadcastsd_pd

_mm256_broadcastb_epi8
_mm256_broadcastw_epi16
_mm256_broadcastd_epi32
_mm256_broadcastq_epi64
_mm256_broadcastss_ps
_mm256_broadcastsd_pd

_mm256_broadcastsi128_si256

_mm512_broadcastb_epi8
_mm512_broadcastw_epi16
_mm512_broadcastd_epi32
_mm512_broadcastq_epi64
_mm512_broadcastss_ps
_mm512_broadcastsd_pd

_mm512_broadcast_f32x2 _mm256_broadcast_f32x2
_mm512_broadcast_i32x2 _mm256_broadcast_i32x2 _mm_broadcast_i32x2
_mm512_broadcast_f32x4 _mm256_broadcast_f32x4
_mm512_broadcast_i32x4 _mm256_broadcast_i32x4
_mm512_broadcast_f32x8
_mm512_broadcast_i32x8
_mm512_broadcast_f64x2 _mm256_broadcast_f64x2
_mm512_broadcast_i64x2 _mm256_broadcast_i64x2
_mm512_broadcast_f64x4
_mm512_broadcast_i64x4

(ignore the AVX512 mask/maskz variants for now)

You can use #152305 as reference.

[llvmbot]

@llvm/issue-subscribers-backend-x86

Author: Simon Pilgrim (RKSimon)

These all wrap generic shuffles:

_mm_broadcastb_epi8
_mm_broadcastw_epi16
_mm_broadcastd_epi32
_mm_broadcastq_epi64
_mm_broadcastss_ps
_mm_broadcastsd_pd

_mm256_broadcastb_epi8
_mm256_broadcastw_epi16
_mm256_broadcastd_epi32
_mm256_broadcastq_epi64
_mm256_broadcastss_ps
_mm256_broadcastsd_pd

_mm256_broadcastsi128_si256

_mm512_broadcastb_epi8
_mm512_broadcastw_epi16
_mm512_broadcastd_epi32
_mm512_broadcastq_epi64
_mm512_broadcastss_ps
_mm512_broadcastsd_pd

_mm512_broadcast_f32x2 _mm256_broadcast_f32x2
_mm512_broadcast_i32x2 _mm256_broadcast_i32x2 _mm_broadcast_i32x2
_mm512_broadcast_f32x4 _mm256_broadcast_f32x4
_mm512_broadcast_i32x4 _mm256_broadcast_i32x4
_mm512_broadcast_f32x8
_mm512_broadcast_i32x8
_mm512_broadcast_f64x2 _mm256_broadcast_f64x2
_mm512_broadcast_i64x2 _mm256_broadcast_i64x2
_mm512_broadcast_f64x4
_mm512_broadcast_i64x4

(ignore the AVX512 mask/maskz variants for now)

You can use #152305 as reference.

[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.
2. Leave a comment indicating that you are working on the issue, or just create a pull request after following the steps below. Mention this issue in the description of the pull request.
3. Fix the issue locally.
4. Run the test suite locally. Remember that the subdirectories under test/ create fine-grained testing targets, so you can e.g. use make check-clang-ast to only run Clang's AST tests.
5. Create a Git commit.
6. Run git clang-format HEAD~1 to format your changes.
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)

These all wrap generic shuffles:

_mm_broadcastb_epi8
_mm_broadcastw_epi16
_mm_broadcastd_epi32
_mm_broadcastq_epi64
_mm_broadcastss_ps
_mm_broadcastsd_pd

_mm256_broadcastb_epi8
_mm256_broadcastw_epi16
_mm256_broadcastd_epi32
_mm256_broadcastq_epi64
_mm256_broadcastss_ps
_mm256_broadcastsd_pd

_mm256_broadcastsi128_si256

_mm512_broadcastb_epi8
_mm512_broadcastw_epi16
_mm512_broadcastd_epi32
_mm512_broadcastq_epi64
_mm512_broadcastss_ps
_mm512_broadcastsd_pd

_mm512_broadcast_f32x2 _mm256_broadcast_f32x2
_mm512_broadcast_i32x2 _mm256_broadcast_i32x2 _mm_broadcast_i32x2
_mm512_broadcast_f32x4 _mm256_broadcast_f32x4
_mm512_broadcast_i32x4 _mm256_broadcast_i32x4
_mm512_broadcast_f32x8
_mm512_broadcast_i32x8
_mm512_broadcast_f64x2 _mm256_broadcast_f64x2
_mm512_broadcast_i64x2 _mm256_broadcast_i64x2
_mm512_broadcast_f64x4
_mm512_broadcast_i64x4

(ignore the AVX512 mask/maskz variants for now)

You can use #152305 as reference.

[TianYe717]

@RKSimon Hi, I'd like to work on this! Can you assign it to me? Thanks!