gallivm: disable avx512 features

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>

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
index bb08892142a174b47f36cc7b7f31b96122ffdd12..42a53ecb092de6ed81a6a2fbbd847f1f16be4b11 100644 (file)
--- 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)