Index: llvm/include/llvm/CodeGen/SelectionDAG.h
===================================================================
--- llvm/include/llvm/CodeGen/SelectionDAG.h
+++ llvm/include/llvm/CodeGen/SelectionDAG.h
@@ -935,7 +935,7 @@
   SDValue getNode(unsigned Opcode, const SDLoc &DL, ArrayRef<EVT> ResultTys,
                   ArrayRef<SDValue> Ops);
   SDValue getNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList,
-                  ArrayRef<SDValue> Ops);
+                  ArrayRef<SDValue> Ops, const SDNodeFlags Flags = SDNodeFlags());
 
   // Specialize based on number of operands.
   SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT);
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
===================================================================
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -7435,7 +7435,7 @@
 }
 
 SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList,
-                              ArrayRef<SDValue> Ops) {
+                              ArrayRef<SDValue> Ops, const SDNodeFlags Flags) {
   if (VTList.NumVTs == 1)
     return getNode(Opcode, DL, VTList.VTs[0], Ops);
 
@@ -7504,6 +7504,7 @@
       return SDValue(E, 0);
 
     N = newSDNode<SDNode>(Opcode, DL.getIROrder(), DL.getDebugLoc(), VTList);
+    N->setFlags(Flags);
     createOperands(N, Ops);
     CSEMap.InsertNode(N, IP);
   } else {
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
===================================================================
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -1113,29 +1113,23 @@
   visit(I.getOpcode(), I);
 
   if (auto *FPMO = dyn_cast<FPMathOperator>(&I)) {
-    // Propagate the fast-math-flags of this IR instruction to the DAG node that
-    // maps to this instruction.
-    // TODO: We could handle all flags (nsw, etc) here.
-    // TODO: If an IR instruction maps to >1 node, only the final node will have
-    //       flags set.
-    if (SDNode *Node = getNodeForIRValue(&I)) {
-      SDNodeFlags IncomingFlags;
-      IncomingFlags.copyFMF(*FPMO);
-      if (!Node->getFlags().isDefined())
-        Node->setFlags(IncomingFlags);
-      else
-        Node->intersectFlagsWith(IncomingFlags);
-    }
-  }
-  // Constrained FP intrinsics with fpexcept.ignore should also get
-  // the NoFPExcept flag.
-  if (auto *FPI = dyn_cast<ConstrainedFPIntrinsic>(&I))
-    if (FPI->getExceptionBehavior() == fp::ExceptionBehavior::ebIgnore)
+    // ContrainedFPIntrinsics handle their own FMF.
+    if (!isa<ConstrainedFPIntrinsic>(&I)) {
+      // Propagate the fast-math-flags of this IR instruction to the DAG node that
+      // maps to this instruction.
+      // TODO: We could handle all flags (nsw, etc) here.
+      // TODO: If an IR instruction maps to >1 node, only the final node will have
+      //       flags set.
       if (SDNode *Node = getNodeForIRValue(&I)) {
-        SDNodeFlags Flags = Node->getFlags();
-        Flags.setNoFPExcept(true);
-        Node->setFlags(Flags);
+        SDNodeFlags IncomingFlags;
+        IncomingFlags.copyFMF(*FPMO);
+        if (!Node->getFlags().isDefined())
+          Node->setFlags(IncomingFlags);
+        else
+          Node->intersectFlagsWith(IncomingFlags);
       }
+    }
+  }
 
   if (!I.isTerminator() && !HasTailCall &&
       !isStatepoint(&I)) // statepoints handle their exports internally
@@ -7080,6 +7074,13 @@
   SDVTList VTs = DAG.getVTList(ValueVTs);
   fp::ExceptionBehavior EB = FPI.getExceptionBehavior().getValue();
 
+  SDNodeFlags Flags;
+  if (EB == fp::ExceptionBehavior::ebIgnore)
+    Flags.setNoFPExcept(true);
+
+  if (auto *FPOp = dyn_cast<FPMathOperator>(&FPI))
+    Flags.copyFMF(*FPOp);
+
   unsigned Opcode;
   switch (FPI.getIntrinsicID()) {
   default: llvm_unreachable("Impossible intrinsic");  // Can't reach here.
@@ -7095,7 +7096,7 @@
         !TLI.isFMAFasterThanFMulAndFAdd(DAG.getMachineFunction(),
                                         ValueVTs[0])) {
       Opers.pop_back();
-      SDValue Mul = DAG.getNode(ISD::STRICT_FMUL, sdl, VTs, Opers);
+      SDValue Mul = DAG.getNode(ISD::STRICT_FMUL, sdl, VTs, Opers, Flags);
       pushOutChain(Mul, EB);
       Opcode = ISD::STRICT_FADD;
       Opers.clear();
@@ -7123,7 +7124,7 @@
   }
   }
 
-  SDValue Result = DAG.getNode(Opcode, sdl, VTs, Opers);
+  SDValue Result = DAG.getNode(Opcode, sdl, VTs, Opers, Flags);
   pushOutChain(Result, EB);
 
   SDValue FPResult = Result.getValue(0);
Index: llvm/test/CodeGen/X86/fp-intrinsics-flags.ll
===================================================================
--- llvm/test/CodeGen/X86/fp-intrinsics-flags.ll
+++ llvm/test/CodeGen/X86/fp-intrinsics-flags.ll
@@ -108,7 +108,7 @@
 ; CHECK: [[MOV32rm:%[0-9]+]]:gr32 = MOV32rm %fixed-stack.0, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.0)
 ; CHECK: [[MOV32rm1:%[0-9]+]]:gr32 = MOV32rm %fixed-stack.1, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.1, align 16)
 ; CHECK: [[MOVSDrm_alt:%[0-9]+]]:fr64 = MOVSDrm_alt %fixed-stack.3, 1, $noreg, 0, $noreg :: (load 8 from %fixed-stack.3, align 16)
-; CHECK: %3:fr64 = nofpexcept DIVSDrm [[MOVSDrm_alt]], %fixed-stack.2, 1, $noreg, 0, $noreg, implicit $mxcsr :: (load 8 from %fixed-stack.2)
+; CHECK: %3:fr64 = DIVSDrm [[MOVSDrm_alt]], %fixed-stack.2, 1, $noreg, 0, $noreg, implicit $mxcsr :: (load 8 from %fixed-stack.2)
 ; CHECK: MOVSDmr killed [[MOV32rm1]], 1, $noreg, 0, $noreg, %3 :: (store 8 into %ir.x, align 4)
 ; CHECK: MOVSDmr killed [[MOV32rm]], 1, $noreg, 0, $noreg, %3 :: (store 8 into %ir.y, align 4)
 ; CHECK: RET 0
@@ -126,7 +126,7 @@
 ; CHECK-LABEL: name: sitofp_cse
 ; CHECK: [[MOV32rm:%[0-9]+]]:gr32 = MOV32rm %fixed-stack.0, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.0, align 8)
 ; CHECK: [[MOV32rm1:%[0-9]+]]:gr32 = MOV32rm %fixed-stack.1, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.1)
-; CHECK: %2:fr64 = nofpexcept CVTSI2SDrm %fixed-stack.2, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.2, align 16)
+; CHECK: %2:fr64 = CVTSI2SDrm %fixed-stack.2, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.2, align 16)
 ; CHECK: MOVSDmr killed [[MOV32rm1]], 1, $noreg, 0, $noreg, %2 :: (store 8 into %ir.x, align 4)
 ; CHECK: MOVSDmr killed [[MOV32rm]], 1, $noreg, 0, $noreg, %2 :: (store 8 into %ir.y, align 4)
 ; CHECK: RET 0