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gallivm: disable avx512 features

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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 <tjaalton@ubuntu.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com

CC: <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Roland Scheidegger 2016-05-08 00:40:07 +02:00
parent 94e8653a3b
commit 8b66e2647d
1 changed files with 12 additions and 0 deletions
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12
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@ -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)