1 files changed, 54 insertions, 0 deletions
diff --git a/gnu/llvm/lib/Target/XCore/XCoreSelectionDAGInfo.cpp b/gnu/llvm/lib/Target/XCore/XCoreSelectionDAGInfo.cpp
new file mode 100644
index 00000000000..40568d124de
--- /dev/null
+++ b/gnu/llvm/lib/Target/XCore/XCoreSelectionDAGInfo.cpp
@@ -0,0 +1,54 @@
+//===-- XCoreSelectionDAGInfo.cpp - XCore SelectionDAG Info ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the XCoreSelectionDAGInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "XCoreTargetMachine.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "xcore-selectiondag-info"
+
+SDValue XCoreSelectionDAGInfo::
+EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl, SDValue Chain,
+                        SDValue Dst, SDValue Src, SDValue Size, unsigned Align,
+                        bool isVolatile, bool AlwaysInline,
+                        MachinePointerInfo DstPtrInfo,
+                        MachinePointerInfo SrcPtrInfo) const
+{
+  unsigned SizeBitWidth = Size.getValueType().getSizeInBits();
+  // Call __memcpy_4 if the src, dst and size are all 4 byte aligned.
+  if (!AlwaysInline && (Align & 3) == 0 &&
+      DAG.MaskedValueIsZero(Size, APInt(SizeBitWidth, 3))) {
+    const TargetLowering &TLI = *DAG.getSubtarget().getTargetLowering();
+    TargetLowering::ArgListTy Args;
+    TargetLowering::ArgListEntry Entry;
+    Entry.Ty = DAG.getDataLayout().getIntPtrType(*DAG.getContext());
+    Entry.Node = Dst; Args.push_back(Entry);
+    Entry.Node = Src; Args.push_back(Entry);
+    Entry.Node = Size; Args.push_back(Entry);
+
+    TargetLowering::CallLoweringInfo CLI(DAG);
+    CLI.setDebugLoc(dl)
+        .setChain(Chain)
+        .setCallee(TLI.getLibcallCallingConv(RTLIB::MEMCPY),
+                   Type::getVoidTy(*DAG.getContext()),
+                   DAG.getExternalSymbol("__memcpy_4",
+                                         TLI.getPointerTy(DAG.getDataLayout())),
+                   std::move(Args), 0)
+        .setDiscardResult();
+
+    std::pair<SDValue,SDValue> CallResult = TLI.LowerCallTo(CLI);
+    return CallResult.second;
+  }
+
+  // Otherwise have the target-independent code call memcpy.
+  return SDValue();
+}