From: Roland Scheidegger Date: Sun May 8 00:40:07 2016 +0200 Subject: [PATCH]gallivm: disable avx512 features Patch-mainline: Upstream Git-repo: git://anongit.freedesktop.org/git/mesa/mesa Git-commit: 8b66e2647d5e36e318177a460e6e586d6ca8c36b References: bsc#980557 Signed-off-by: Egbert Eich We don't target this yet, and some llvm versions incorrectly enable it based on cpu string, causing crashes. (Albeit this is a losing battle, it is pretty much guaranteed when the next new feature comes along llvm will mistakenly enable it on some future cpu, thus we would have to proactively disable all new features as llvm adds them.) This should fix https://bugs.freedesktop.org/show_bug.cgi?id=94291 (untested) Tested-by: Timo Aaltonen Reviewed-by: Jose Fonseca --- src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp index bb08892..42a53ec 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp +++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp @@ -571,6 +571,18 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT, MAttrs.push_back(util_cpu_caps.has_avx ? "+avx" : "-avx"); MAttrs.push_back(util_cpu_caps.has_f16c ? "+f16c" : "-f16c"); MAttrs.push_back(util_cpu_caps.has_avx2 ? "+avx2" : "-avx2"); + /* disable avx512 and all subvariants */ +#if HAVE_LLVM >= 0x0304 + MAttrs.push_back("-avx512cd"); + MAttrs.push_back("-avx512er"); + MAttrs.push_back("-avx512f"); + MAttrs.push_back("-avx512pf"); +#endif +#if HAVE_LLVM >= 0x0305 + MAttrs.push_back("-avx512bw"); + MAttrs.push_back("-avx512dq"); + MAttrs.push_back("-avx512vl"); +#endif #endif #if defined(PIPE_ARCH_PPC)