1 files changed, 15 insertions, 1 deletions
diff --git a/lib/IR/Instruction.cpp b/lib/IR/Instruction.cpp
index 5f2a6146ad81..508db9bcaf19 100644
--- a/lib/IR/Instruction.cpp
+++ b/lib/IR/Instruction.cpp
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/IR/Instruction.h"
+#include "llvm/IR/IntrinsicInst.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Instructions.h"
@@ -589,6 +590,18 @@ bool Instruction::mayThrow() const {
   return isa<ResumeInst>(this);
 }
 
+bool Instruction::isSafeToRemove() const {
+  return (!isa<CallInst>(this) || !this->mayHaveSideEffects()) &&
+         !isa<TerminatorInst>(this);
+}
+
+const Instruction *Instruction::getNextNonDebugInstruction() const {
+  for (const Instruction *I = getNextNode(); I; I = I->getNextNode())
+    if (!isa<DbgInfoIntrinsic>(I))
+      return I;
+  return nullptr;
+}
+
 bool Instruction::isAssociative() const {
   unsigned Opcode = getOpcode();
   if (isAssociative(Opcode))
@@ -597,7 +610,8 @@ bool Instruction::isAssociative() const {
   switch (Opcode) {
   case FMul:
   case FAdd:
-    return cast<FPMathOperator>(this)->isFast();
+    return cast<FPMathOperator>(this)->hasAllowReassoc() &&
+           cast<FPMathOperator>(this)->hasNoSignedZeros();
   default:
     return false;
   }