[PATCH] D51231: [X86] Make Feature64Bit useful

Mon Sep 24 11:28:57 PDT 2018

anna added a comment.

In https://reviews.llvm.org/D51231#1243547, @craig.topper wrote:

> @anna, the "lm" in the flags from the cpuinfo should be the 64bit flag. Is this failing with clang, or llc, or some other program that uses llvm libraries?

Interesting. It's failing with our Azul JIT (Falcon) which uses the llvm libraries.
We populate the features using llvm's `sys::getHostCPUFeatures` and set the mcpu and mattr in the `EngineBuilder`.
Note that if I manually add "+64bit" in the feature population (after all features retrieved by `getHostCPUFeatures ` have been added into the mattr), there is no code gen failure on the KVM.

Repository:
  rL LLVM

https://reviews.llvm.org/D51231