Re: [PATCH] libsanitizer: Use SSE to save and restore XMM registers

[Jakub Jelinek via Gcc-patches]

On Tue, Nov 30, 2021 at 06:20:09AM -0800, H.J. Lu via Gcc-patches wrote:
> Use SSE, instead of AVX, to save and restore XMM registers to support
> processors without AVX.  The affected codes are unused in upstream since
> 
> https://github.com/llvm/llvm-project/commit/66d4ce7e26a5
> 
> and will be removed in
> 
> https://reviews.llvm.org/D112604
> 
> This fixed
> 
> FAIL: g++.dg/tsan/pthread_cond_clockwait.C   -O0  execution test
> FAIL: g++.dg/tsan/pthread_cond_clockwait.C   -O2  execution test
> 
> on machines without AVX.
> 
>       PR sanitizer/103466
>       * tsan/tsan_rtl_amd64.S (__tsan_trace_switch_thunk): Replace
>       vmovdqu with movdqu.
>       (__tsan_report_race_thunk): Likewise.

Ok, thanks.

        Jakub