1 files changed, 0 insertions, 47 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index af86d876813..e03282cad6b 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -6044,49 +6044,6 @@ bool SelectionDAGBuilder::visitMemChrCall(const CallInst &I) {
   return false;
 }
 
-///
-/// visitMemPCpyCall -- lower a mempcpy call as a memcpy followed by code to
-/// to adjust the dst pointer by the size of the copied memory.
-bool SelectionDAGBuilder::visitMemPCpyCall(const CallInst &I) {
-
-  // Verify argument count: void *mempcpy(void *, const void *, size_t)
-  if (I.getNumArgOperands() != 3)
-    return false;
-
-  SDValue Dst = getValue(I.getArgOperand(0));
-  SDValue Src = getValue(I.getArgOperand(1));
-  SDValue Size = getValue(I.getArgOperand(2));
-
-  unsigned DstAlign = DAG.InferPtrAlignment(Dst);
-  unsigned SrcAlign = DAG.InferPtrAlignment(Src);
-  unsigned Align = std::min(DstAlign, SrcAlign);
-  if (Align == 0) // Alignment of one or both could not be inferred.
-    Align = 1; // 0 and 1 both specify no alignment, but 0 is reserved.
-
-  bool isVol = false;
-  SDLoc sdl = getCurSDLoc();
-
-  // In the mempcpy context we need to pass in a false value for isTailCall
-  // because the return pointer needs to be adjusted by the size of
-  // the copied memory.
-  SDValue MC = DAG.getMemcpy(getRoot(), sdl, Dst, Src, Size, Align, isVol,
-                             false, /*isTailCall=*/false,
-                             MachinePointerInfo(I.getArgOperand(0)),
-                             MachinePointerInfo(I.getArgOperand(1)));
-  assert(MC.getNode() != nullptr &&
-         "** memcpy should not be lowered as TailCall in mempcpy context **");
-  DAG.setRoot(MC);
-
-  // Check if Size needs to be truncated or extended.
-  Size = DAG.getSExtOrTrunc(Size, sdl, Dst.getValueType());
-
-  // Adjust return pointer to point just past the last dst byte.
-  SDValue DstPlusSize = DAG.getNode(ISD::ADD, sdl, Dst.getValueType(),
-                                    Dst, Size);
-  setValue(&I, DstPlusSize);
-  return true;
-}
-
 /// visitStrCpyCall -- See if we can lower a strcpy or stpcpy call into an
 /// optimized form.  If so, return true and lower it, otherwise return false
 /// and it will be lowered like a normal call.
@@ -6377,10 +6334,6 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) {
         if (visitMemCmpCall(I))
           return;
         break;
-      case LibFunc::mempcpy:
-        if (visitMemPCpyCall(I))
-          return;
-        break;
       case LibFunc::memchr:
         if (visitMemChrCall(I))
           return;