2 files changed, 7 insertions, 2 deletions
diff --git a/llvm/lib/IR/Instruction.cpp b/llvm/lib/IR/Instruction.cpp
index 86421c4ae9f..50b1f04d41e 100644
--- a/llvm/lib/IR/Instruction.cpp
+++ b/llvm/lib/IR/Instruction.cpp
@@ -143,6 +143,11 @@ void Instruction::setFastMathFlags(FastMathFlags FMF) {
   cast<FPMathOperator>(this)->setFastMathFlags(FMF);
 }
 
+void Instruction::copyFastMathFlags(FastMathFlags FMF) {
+  assert(isa<FPMathOperator>(this) && "copying fast-math flag on invalid op");
+  cast<FPMathOperator>(this)->copyFastMathFlags(FMF);
+}
+
 /// Determine whether the unsafe-algebra flag is set.
 bool Instruction::hasUnsafeAlgebra() const {
   assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
@@ -183,7 +188,7 @@ FastMathFlags Instruction::getFastMathFlags() const {
 
 /// Copy I's fast-math flags
 void Instruction::copyFastMathFlags(const Instruction *I) {
-  setFastMathFlags(I->getFastMathFlags());
+  copyFastMathFlags(I->getFastMathFlags());
 }
 
 
diff --git a/llvm/lib/IR/Instructions.cpp b/llvm/lib/IR/Instructions.cpp
index 16993f1bba5..b113d51d416 100644
--- a/llvm/lib/IR/Instructions.cpp
+++ b/llvm/lib/IR/Instructions.cpp
@@ -2043,7 +2043,7 @@ void BinaryOperator::copyFlags(const Value *V) {
   
   // Copy the fast-math flags.
   if (auto *FP = dyn_cast<FPMathOperator>(V))
-    setFastMathFlags(FP->getFastMathFlags());
+    copyFastMathFlags(FP->getFastMathFlags());
 }
 
 //===----------------------------------------------------------------------===//