commit 9bb6931c257c420d53c5e0098faf5ce08fe6dbc9
author Tim Northover <tnorthover@apple.com> Mon May 01 17:50:15 2017 +0000
committer Tim Northover <tnorthover@apple.com> Mon May 01 17:50:15 2017 +0000
tree 191c20cb4453dcde8093e0bc23382f124f7c95af
parent cdcc5b61f413b9d4687b5b34b8e24f13bd9a8dfe

X86: initialize a few subtarget variables.

Otherwise an indeterminate value gets read, causing a bunch of UBSan failures.

llvm-svn: 301819

llvm/lib/Target/X86/X86Subtarget.cpp

diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index b805ddf..82ff436 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -290,6 +290,9 @@
   HasMWAITX = false;
   HasCLZERO = false;
   HasMPX = false;
+  HasSGX = false;
+  HasCLFLUSHOPT = false;
+  HasCLWB = false;
   IsBTMemSlow = false;
   IsPMULLDSlow = false;
   IsSHLDSlow = false;