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[XLA:CPU] Disable AVX512 in XLA:CPU due to miscompilations.

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PiperOrigin-RevId: 256377398
This commit is contained in:
Peter Hawkins 2019-07-03 08:59:35 -07:00 committed by TensorFlower Gardener
parent 6f0584298b
commit 7a8fd724ea
1 changed files with 14 additions and 2 deletions
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16
tensorflow/compiler/xla/service/cpu/simple_orc_jit.cc
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@ -56,12 +56,24 @@ llvm::SmallVector<std::string, 0> DetectMachineAttributes() {
if (llvm::sys::getHostCPUFeatures(host_features)) { if (llvm::sys::getHostCPUFeatures(host_features)) {
for (auto& feature : host_features) { for (auto& feature : host_features) {
if (feature.second) { if (feature.second) {
result.push_back(feature.first()); llvm::StringRef feature_name = feature.first();
// Skip avx512 for now, it isn't quite ready in LLVM.
if (feature_name.startswith("avx512")) {
continue;
}
result.push_back(feature_name);
} }
} }
} }
return result; return result;
} }
llvm::StringRef GetHostCpuName() {
auto cpu_name = llvm::sys::getHostCPUName();
// Skip avx512 for now, it isn't quite ready in LLVM.
cpu_name.consume_back("-avx512");
return cpu_name;
}
} // namespace } // namespace
/*static*/ std::unique_ptr<llvm::TargetMachine> /*static*/ std::unique_ptr<llvm::TargetMachine>
@ -74,7 +86,7 @@ SimpleOrcJIT::InferTargetMachineForJIT(
.setOptLevel(opt_level) .setOptLevel(opt_level)
.selectTarget( .selectTarget(
/*TargetTriple=*/llvm::Triple(), /*MArch=*/"", /*TargetTriple=*/llvm::Triple(), /*MArch=*/"",
/*MCPU=*/llvm::sys::getHostCPUName(), /*MCPU=*/GetHostCpuName(),
/*MAttrs=*/DetectMachineAttributes())); /*MAttrs=*/DetectMachineAttributes()));
CHECK(target_machine != nullptr); CHECK(target_machine != nullptr);
return target_machine; return target_machine;