search for: pr21510

Hi all, Recently, Reid Kleckner found an ABI incompatibility between clang and GCC in the way vector parameters are passed on 32-bit x86. (This is documented in PR21510.) Specifically, GCC uses XMM0-XMM2 to pass the first 3 __m128 parameters, and the rest are passed on the stack. Clang passes an additional parameter by register, using XMM0-XMM3. The same applies to __m256 with YMM0-2 vs. YMM0-3. In theory, it would apply to __m512 as well, but currently clang doe...