Revert r265547 "Recommit r265309 after fixed an invalid memory reference bug happened"

It caused PR27275: "ARM: Bad machine code: Using an undefined physical register"

Also reverting the following commits that were landed on top:
r265610 "Fix the compare-clang diff error introduced by r265547."
r265639 "Fix the sanitizer bootstrap error in r265547."
r265657 "InlineSpiller.cpp: Escap \@ in r265547. [-Wdocumentation]"

llvm-svn: 265790

1 files changed, 0 insertions, 10 deletions

diff --git a/llvm/lib/CodeGen/RegAllocBase.h b/llvm/lib/CodeGen/RegAllocBase.h
index 296ffe8692c..659b8f505a2 100644
--- a/llvm/lib/CodeGen/RegAllocBase.h
+++ b/llvm/lib/CodeGen/RegAllocBase.h
@@ -65,12 +65,6 @@ protected:
   LiveRegMatrix *Matrix;
   RegisterClassInfo RegClassInfo;
 
-  /// Inst which is a def of an original reg and whose defs are already all
-  /// dead after remat is saved in DeadRemats. The deletion of such inst is
-  /// postponed till all the allocations are done, so its remat expr is
-  /// always available for the remat of all the siblings of the original reg.
-  SmallPtrSet<MachineInstr *, 32> DeadRemats;
-
   RegAllocBase()
     : TRI(nullptr), MRI(nullptr), VRM(nullptr), LIS(nullptr), Matrix(nullptr) {}
 
@@ -83,10 +77,6 @@ protected:
   // physical register assignments.
   void allocatePhysRegs();
 
-  // Include spiller post optimization and removing dead defs left because of
-  // rematerialization.
-  virtual void postOptimization();
-
   // Get a temporary reference to a Spiller instance.
   virtual Spiller &spiller() = 0;