[Outliner] Fixed Asan bot failure in r296418

Fixed the asan bot failure which led to the last commit of the outliner being reverted.
The change is in lib/CodeGen/MachineOutliner.cpp in the SuffixTree's constructor. LeafVector
is no longer initialized using reserve but just a standard constructor.

llvm-svn: 297081
diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h
index c2644a3..274201d 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.h
+++ b/llvm/lib/Target/X86/X86InstrInfo.h
@@ -545,6 +545,25 @@
 
   bool isTailCall(const MachineInstr &Inst) const override;
 
+  unsigned getOutliningBenefit(size_t SequenceSize,
+                               size_t Occurrences) const override;
+
+  bool isFunctionSafeToOutlineFrom(MachineFunction &MF) const override;
+
+  llvm::X86GenInstrInfo::MachineOutlinerInstrType
+  getOutliningType(MachineInstr &MI) const override;
+
+  void insertOutlinerEpilogue(MachineBasicBlock &MBB,
+                              MachineFunction &MF) const override;
+
+  void insertOutlinerPrologue(MachineBasicBlock &MBB,
+                              MachineFunction &MF) const override;
+
+  MachineBasicBlock::iterator
+  insertOutlinedCall(Module &M, MachineBasicBlock &MBB,
+                     MachineBasicBlock::iterator &It,
+                     MachineFunction &MF) const override;
+
 protected:
   /// Commutes the operands in the given instruction by changing the operands
   /// order and/or changing the instruction's opcode and/or the immediate value