diff --git a/llvm/lib/Target/X86/X86FixupBWInsts.cpp b/llvm/lib/Target/X86/X86FixupBWInsts.cpp
--- a/llvm/lib/Target/X86/X86FixupBWInsts.cpp
+++ b/llvm/lib/Target/X86/X86FixupBWInsts.cpp
@@ -148,8 +148,8 @@
   /// Register Liveness information after the current instruction.
   LivePhysRegs LiveRegs;
 
-  ProfileSummaryInfo *PSI;
-  MachineBlockFrequencyInfo *MBFI;
+  ProfileSummaryInfo *PSI = nullptr;
+  MachineBlockFrequencyInfo *MBFI = nullptr;
 };
 char FixupBWInstPass::ID = 0;
 }
diff --git a/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp b/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp
--- a/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp
+++ b/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp
@@ -154,9 +154,9 @@
   using EdgeSet = MachineGadgetGraph::EdgeSet;
   using NodeSet = MachineGadgetGraph::NodeSet;
 
-  const X86Subtarget *STI;
-  const TargetInstrInfo *TII;
-  const TargetRegisterInfo *TRI;
+  const X86Subtarget *STI = nullptr;
+  const TargetInstrInfo *TII = nullptr;
+  const TargetRegisterInfo *TRI = nullptr;
 
   std::unique_ptr<MachineGadgetGraph>
   getGadgetGraph(MachineFunction &MF, const MachineLoopInfo &MLI,