diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -1459,6 +1459,10 @@
                                                 unsigned AddressSpace,
                                                 TTI::TargetCostKind CostKind,
                                                 const Instruction *I) {
+  if(I && I->hasOneUse()) {
+    if (const TruncInst *TI = dyn_cast<TruncInst>(*I->user_begin()))
+      Ty = TI->getDestTy();
+  }
   EVT VT = TLI->getValueType(DL, Ty, true);
   // Type legalization can't handle structs
   if (VT == MVT::Other)
diff --git a/llvm/test/Analysis/CostModel/AArch64/load-to-trunc.ll b/llvm/test/Analysis/CostModel/AArch64/load-to-trunc.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Analysis/CostModel/AArch64/load-to-trunc.ll
@@ -0,0 +1,21 @@
+; Check memory cost model action for a load of an unusually sized integer
+; follow by and a trunc to a register sized integer gives a cost of 1 rather
+; than the expanded cost if it is not.
+
+; RUN: opt -cost-model -analyze -mtriple=aarch64--linux-gnu < %s | FileCheck %s --check-prefix=CHECK
+
+; Check that cost is 1 for unusual load to 
+define i32 @loadUnusualIntegerWithTrunc(i1228* %ptr) {
+; CHECK: 'Cost Model Analysis' for function 'loadUnusualIntegerWithTrunc':
+; CHECK: Cost Model: Found an estimated cost of 1 for instruction:
+  %out = load i1228, i1228* %ptr
+  %trunc = trunc i1228 %out to i32
+  ret i32 %trunc
+}
+
+define i1228 @loadUnusualInteger(i1228* %ptr) {
+; CHECK: 'Cost Model Analysis' for function 'loadUnusualInteger':
+; CHECKa load : Cost Model: Found an estimated cost of 32 for instruction:
+  %out = load i1228, i1228* %ptr
+  ret i1228 %out
+}
\ No newline at end of file