[llvm] r301819 - X86: initialize a few subtarget variables.

[Tim Northover via llvm-commits]

Author: tnorthover
Date: Mon May  1 12:50:15 2017
New Revision: 301819

URL: http://llvm.org/viewvc/llvm-project?rev=301819&view=rev
Log:
X86: initialize a few subtarget variables.

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

Modified:
    llvm/trunk/lib/Target/X86/X86Subtarget.cpp

Modified: llvm/trunk/lib/Target/X86/X86Subtarget.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.cpp?rev=301819&r1=301818&r2=301819&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.cpp Mon May  1 12:50:15 2017
@@ -290,6 +290,9 @@ void X86Subtarget::initializeEnvironment
   HasMWAITX = false;
   HasCLZERO = false;
   HasMPX = false;
+  HasSGX = false;
+  HasCLFLUSHOPT = false;
+  HasCLWB = false;
   IsBTMemSlow = false;
   IsPMULLDSlow = false;
   IsSHLDSlow = false;