LLVM  10.0.0svn
XCoreTargetTransformInfo.h
Go to the documentation of this file.
1 //===-- XCoreTargetTransformInfo.h - XCore specific TTI ---------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 /// This file a TargetTransformInfo::Concept conforming object specific to the
10 /// XCore target machine. It uses the target's detailed information to
11 /// provide more precise answers to certain TTI queries, while letting the
12 /// target independent and default TTI implementations handle the rest.
13 ///
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_LIB_TARGET_XCORE_XCORETARGETTRANSFORMINFO_H
17 #define LLVM_LIB_TARGET_XCORE_XCORETARGETTRANSFORMINFO_H
18 
19 #include "XCore.h"
20 #include "XCoreTargetMachine.h"
24 
25 namespace llvm {
26 
27 class XCoreTTIImpl : public BasicTTIImplBase<XCoreTTIImpl> {
29  typedef TargetTransformInfo TTI;
30  friend BaseT;
31 
32  const XCoreSubtarget *ST;
33  const XCoreTargetLowering *TLI;
34 
35  const XCoreSubtarget *getST() const { return ST; }
36  const XCoreTargetLowering *getTLI() const { return TLI; }
37 
38 public:
39  explicit XCoreTTIImpl(const XCoreTargetMachine *TM, const Function &F)
40  : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl()),
41  TLI(ST->getTargetLowering()) {}
42 
43  unsigned getNumberOfRegisters(unsigned ClassID) const {
44  bool Vector = (ClassID == 1);
45  if (Vector) {
46  return 0;
47  }
48  return 12;
49  }
50 };
51 
52 } // end namespace llvm
53 
54 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
XCoreTTIImpl(const XCoreTargetMachine *TM, const Function &F)
F(f)
Base class which can be used to help build a TTI implementation.
Definition: BasicTTIImpl.h:77
This file provides a helper that implements much of the TTI interface in terms of the target-independ...
This pass provides access to the codegen interfaces that are needed for IR-level transformations.
unsigned getNumberOfRegisters(unsigned ClassID) const
static const Function * getParent(const Value *V)
const DataLayout & getDataLayout() const
This pass exposes codegen information to IR-level passes.
This file describes how to lower LLVM code to machine code.