[libc-commits] [libc] [libc][bug] Fix out of bound write in memcpy wi software prefetching (PR #90613)

[Clement Courbet via libc-commits]

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@@ -140,6 +146,12 @@ inline_memcpy_x86_avx_ge64_sw_prefetching(Ptr __restrict dst,
     offset += K_THREE_CACHELINES;
   }
   return builtin::Memcpy<64>::loop_and_tail_offset(dst, src, count, offset);
+  // We don't use 'loop_and_tail_offset' because it assumes at least one
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legrosbuffle wrote:

This is dead code. (return above). I'm surprised this was not caught by tests ?

https://github.com/llvm/llvm-project/pull/90613