Fix uninitialized pointer members in CodeGen

This change initializes the members TSI, LI, DT, PSI, and ORE pointer feilds of the SelectOptimize class to nullptr.

Reviewed By: LuoYuanke

Differential Revision: https://reviews.llvm.org/D148303

1 files changed, 8 insertions, 8 deletions

diff --git a/llvm/lib/CodeGen/VirtRegMap.cpp b/llvm/lib/CodeGen/VirtRegMap.cpp
index 8e00712..8021ca1 100644
--- a/llvm/lib/CodeGen/VirtRegMap.cpp
+++ b/llvm/lib/CodeGen/VirtRegMap.cpp
@@ -181,14 +181,14 @@ LLVM_DUMP_METHOD void VirtRegMap::dump() const {
 namespace {
 
 class VirtRegRewriter : public MachineFunctionPass {
-  MachineFunction *MF;
-  const TargetRegisterInfo *TRI;
-  const TargetInstrInfo *TII;
-  MachineRegisterInfo *MRI;
-  SlotIndexes *Indexes;
-  LiveIntervals *LIS;
-  VirtRegMap *VRM;
-  LiveDebugVariables *DebugVars;
+  MachineFunction *MF = nullptr;
+  const TargetRegisterInfo *TRI = nullptr;
+  const TargetInstrInfo *TII = nullptr;
+  MachineRegisterInfo *MRI = nullptr;
+  SlotIndexes *Indexes = nullptr;
+  LiveIntervals *LIS = nullptr;
+  VirtRegMap *VRM = nullptr;
+  LiveDebugVariables *DebugVars = nullptr;
   DenseSet<Register> RewriteRegs;
   bool ClearVirtRegs;