Index: lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
+++ lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
@@ -2102,13 +2102,12 @@
 
   // Load the value as an integer value with the same number of bits.
   EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
-  auto MMOFlags =
-      L->getMemOperand()->getFlags() &
-      ~(MachineMemOperand::MOInvariant | MachineMemOperand::MODereferenceable);
   SDValue newL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(), IVT,
                              SDLoc(N), L->getChain(), L->getBasePtr(),
                              L->getOffset(), L->getPointerInfo(), IVT,
-                             L->getAlignment(), MMOFlags, L->getAAInfo());
+                             L->getAlignment(),
+                             L->getMemOperand()->getFlags(),
+                             L->getAAInfo());
   // Legalize the chain result by replacing uses of the old value chain with the
   // new one
   ReplaceValueWith(SDValue(N, 1), newL.getValue(1));
Index: test/CodeGen/AMDGPU/legalize-fp-load-invariant.ll
===================================================================
--- /dev/null
+++ test/CodeGen/AMDGPU/legalize-fp-load-invariant.ll
@@ -0,0 +1,13 @@
+; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs -stop-after=isel -o - %s | FileCheck -check-prefix=GCN %s
+
+; Type legalization for illegal FP type results was dropping invariant
+; and dereferenceable flags.
+
+; GCN: BUFFER_LOAD_USHORT_OFFSET killed %{{[0-9]+}}, 0, 0, 0, 0, 0, implicit $exec :: (dereferenceable invariant load 2 from %ir.ptr, addrspace 4)
+define half @legalize_f16_load(half addrspace(4)* dereferenceable(4) %ptr) {
+  %load = load half, half addrspace(4)* %ptr, !invariant.load !0
+  %add = fadd half %load, 1.0
+  ret half %add
+}
+
+!0 = !{}