Index: llvm/lib/Transforms/IPO/FunctionSpecialization.cpp
===================================================================
--- llvm/lib/Transforms/IPO/FunctionSpecialization.cpp
+++ llvm/lib/Transforms/IPO/FunctionSpecialization.cpp
@@ -55,6 +55,7 @@
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/Transforms/Scalar/SCCP.h"
 #include "llvm/Transforms/Utils/Cloning.h"
+#include "llvm/Transforms/Utils/Local.h"
 #include "llvm/Transforms/Utils/SCCPSolver.h"
 #include "llvm/Transforms/Utils/SizeOpts.h"
 #include <cmath>
@@ -376,7 +377,7 @@
 
     // Remove the instruction from Block and Solver.
     if (auto *I = dyn_cast<Instruction>(V)) {
-      if (I->isSafeToRemove()) {
+      if (wouldInstructionBeTriviallyDead(I)) {
         ReplacedWithConstant.push_back(I);
         Solver.removeLatticeValueFor(I);
       }