[Support/BLAKE3] quick fix for Cygwin build

[kikairoya]

BLAKE3 1.8.2 ( imported in d2ad63a ) fails to build for the Cygwin target.

see: BLAKE3-team/BLAKE3#494

As a temporary workaround, add && !defined(__CYGWIN__) to BLAKE3 locally.

resolves #148365

[llvmbot]

@llvm/pr-subscribers-llvm-support

Author: Tomohiro Kashiwada (kikairoya)

Changes

BLAKE3 1.8.2 ( imported in d2ad63a ) fails to build for the Cygwin target.

see: BLAKE3-team/BLAKE3#494

As a temporary workaround, add && !defined(__CYGWIN__) to BLAKE3 locally.

resolves #148365

---

Full diff: https://github.com/llvm/llvm-project/pull/148635.diff

2 Files Affected:

• (modified) llvm/lib/Support/BLAKE3/blake3_dispatch.c (+1-1)
• (modified) llvm/lib/Support/BLAKE3/blake3_impl.h (+1-1)

diff --git a/llvm/lib/Support/BLAKE3/blake3_dispatch.c b/llvm/lib/Support/BLAKE3/blake3_dispatch.c
index d00580fe35195..19918aa708b2f 100644
--- a/llvm/lib/Support/BLAKE3/blake3_dispatch.c
+++ b/llvm/lib/Support/BLAKE3/blake3_dispatch.c
@@ -236,7 +236,7 @@ void blake3_xof_many(const uint32_t cv[8],
 #if defined(IS_X86)
   const enum cpu_feature features = get_cpu_features();
   MAYBE_UNUSED(features);
-#if !defined(_WIN32) && !defined(BLAKE3_NO_AVX512)
+#if !defined(_WIN32) && !defined(__CYGWIN__) && !defined(BLAKE3_NO_AVX512)
   if (features & AVX512VL) {
     blake3_xof_many_avx512(cv, block, block_len, counter, flags, out, outblocks);
     return;
diff --git a/llvm/lib/Support/BLAKE3/blake3_impl.h b/llvm/lib/Support/BLAKE3/blake3_impl.h
index deed079e468a5..dd71e729f208f 100644
--- a/llvm/lib/Support/BLAKE3/blake3_impl.h
+++ b/llvm/lib/Support/BLAKE3/blake3_impl.h
@@ -324,7 +324,7 @@ void blake3_hash_many_avx512(const uint8_t *const *inputs, size_t num_inputs,
                              uint8_t flags, uint8_t flags_start,
                              uint8_t flags_end, uint8_t *out);
 
-#if !defined(_WIN32)
+#if !defined(_WIN32) && !defined(__CYGWIN__)
 LLVM_LIBRARY_VISIBILITY
 void blake3_xof_many_avx512(const uint32_t cv[8],
                             const uint8_t block[BLAKE3_BLOCK_LEN],

[kikairoya]

@Meinersbur
Thank you for the suggestion. Could you please take a look when you have time?

[Meinersbur]

LGTM