[all-commits] [llvm/llvm-project] 140d46: [X86][ByteCode] Allow PSHUFB intrinsics to be used...

[shashank1545 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 140d46579f815de26c116dd36f32c7dc5dc827df
      https://github.com/llvm/llvm-project/commit/140d46579f815de26c116dd36f32c7dc5dc827df
  Author: shashank1545 <37805084+shashank1545 at users.noreply.github.com>
  Date:   2025-10-15 (Wed, 15 Oct 2025)

  Changed paths:
    M clang/include/clang/Basic/BuiltinsX86.td
    M clang/lib/AST/ByteCode/InterpBuiltin.cpp
    M clang/lib/AST/ExprConstant.cpp
    M clang/lib/Headers/avx2intrin.h
    M clang/lib/Headers/avx512bwintrin.h
    M clang/lib/Headers/avx512vlbwintrin.h
    M clang/lib/Headers/tmmintrin.h
    M clang/test/CodeGen/X86/avx2-builtins.c
    M clang/test/CodeGen/X86/avx512bw-builtins.c
    M clang/test/CodeGen/X86/avx512vlbw-builtins.c
    M clang/test/CodeGen/X86/mmx-builtins.c
    M clang/test/CodeGen/X86/ssse3-builtins.c

  Log Message:
  -----------
  [X86][ByteCode] Allow PSHUFB intrinsics to be used in constexpr #156612 (#163148)

The PSHUFB instruction shuffles bytes within each 128-bit lane: for each
control byte, if bit 7 is set, the output byte is zeroed; otherwise, the
low 4 bits select a source byte (0–15) from the same lane.

Note: _mm_shuffle_pi8 function had to change as __anyext128 had negative
indices which are invalid in constant expression context.

Fixes #156612



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