XCoreTargetTransformInfo.cpp revision 263508 
1//===-- XCoreTargetTransformInfo.cpp - XCore specific TTI pass ----------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9/// \file
10/// This file implements a TargetTransformInfo analysis pass specific to the
11/// XCore target machine. It uses the target's detailed information to provide
12/// more precise answers to certain TTI queries, while letting the target
13/// independent and default TTI implementations handle the rest.
14///
15//===----------------------------------------------------------------------===//
16
17#define DEBUG_TYPE "xcoretti"
18#include "XCore.h"
19#include "llvm/Analysis/TargetTransformInfo.h"
20#include "llvm/Support/Debug.h"
21#include "llvm/Target/TargetLowering.h"
22#include "llvm/Target/CostTable.h"
23using namespace llvm;
24
25// Declare the pass initialization routine locally as target-specific passes
26// don't havve a target-wide initialization entry point, and so we rely on the
27// pass constructor initialization.
28namespace llvm {
29void initializeXCoreTTIPass(PassRegistry &);
30}
31
32namespace {
33
34class XCoreTTI : public ImmutablePass, public TargetTransformInfo {
35public:
36  XCoreTTI() : ImmutablePass(ID) {
37    llvm_unreachable("This pass cannot be directly constructed");
38  }
39
40  XCoreTTI(const XCoreTargetMachine *TM)
41      : ImmutablePass(ID) {
42    initializeXCoreTTIPass(*PassRegistry::getPassRegistry());
43  }
44
45  virtual void initializePass() {
46    pushTTIStack(this);
47  }
48
49  virtual void finalizePass() {
50    popTTIStack();
51  }
52
53  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
54    TargetTransformInfo::getAnalysisUsage(AU);
55  }
56
57  static char ID;
58
59  virtual void *getAdjustedAnalysisPointer(const void *ID) {
60    if (ID == &TargetTransformInfo::ID)
61      return (TargetTransformInfo*)this;
62    return this;
63  }
64
65  unsigned getNumberOfRegisters(bool Vector) const {
66    if (Vector) {
67       return 0;
68    }
69    return 12;
70  }
71};
72
73} // end anonymous namespace
74
75INITIALIZE_AG_PASS(XCoreTTI, TargetTransformInfo, "xcoretti",
76                   "XCore Target Transform Info", true, true, false)
77char XCoreTTI::ID = 0;
78
79
80ImmutablePass *
81llvm::createXCoreTargetTransformInfoPass(const XCoreTargetMachine *TM) {
82  return new XCoreTTI(TM);
83}
84