Rollup merge of #79861 - tmiasko:llvm, r=cuviper

tmandry · web-flow · commit 8ffe7b6a81ec · 2020-12-09T13:38:36.000-08:00
Update LLVM submodule * [[msan] Fix bugs when instrumenting x86.avx512*_cvt* intrinsics](rust-lang/llvm-project#84) * [[X86][AVX512] Only lower to VPALIGNR if we have BWI (PR48322)](rust-lang/llvm-project#85)
diff --git a/src/llvm-project b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 7ade8dc4b84142abd3e6d1fb8a0f4111b0bbd571
+Subproject commit 8d78ad13896b955f630714f386a95ed91b237e3d
