Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/lib/CodeGen/BasicTargetTransformInfo.cpp

@@ -0,0 +1,35 @@
+//===- BasicTargetTransformInfo.cpp - Basic target-independent TTI impl ---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file provides the implementation of a basic TargetTransformInfo pass
+/// predicated on the target abstractions present in the target independent
+/// code generator. It uses these (primarily TargetLowering) to model as much
+/// of the TTI query interface as possible. It is included by most targets so
+/// that they can specialize only a small subset of the query space.
+///
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/BasicTTIImpl.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+#include "llvm/IR/Function.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/TargetMachine.h"
+
+using namespace llvm;
+
+// This flag is used by the template base class for BasicTTIImpl, and here to
+// provide a definition.
+cl::opt<unsigned>
+llvm::PartialUnrollingThreshold("partial-unrolling-threshold", cl::init(0),
+                                cl::desc("Threshold for partial unrolling"),
+                                cl::Hidden);
+
+BasicTTIImpl::BasicTTIImpl(const TargetMachine *TM, const Function &F)
+    : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
+      TLI(ST->getTargetLowering()) {}