1 //===-- SystemZConstantPoolValue.cpp - SystemZ constant-pool value --------===//
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 
9 #include "SystemZConstantPoolValue.h"
10 #include "llvm/ADT/FoldingSet.h"
11 #include "llvm/IR/DerivedTypes.h"
12 #include "llvm/IR/GlobalValue.h"
13 #include "llvm/Support/raw_ostream.h"
14 
15 using namespace llvm;
16 
17 SystemZConstantPoolValue::
18 SystemZConstantPoolValue(const GlobalValue *gv,
19                          SystemZCP::SystemZCPModifier modifier)
20   : MachineConstantPoolValue(gv->getType()), GV(gv), Modifier(modifier) {}
21 
22 SystemZConstantPoolValue *
23 SystemZConstantPoolValue::Create(const GlobalValue *GV,
24                                  SystemZCP::SystemZCPModifier Modifier) {
25   return new SystemZConstantPoolValue(GV, Modifier);
26 }
27 
28 int SystemZConstantPoolValue::
29 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
30   unsigned AlignMask = Alignment - 1;
31   const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
32   for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
33     if (Constants[I].isMachineConstantPoolEntry() &&
34         (Constants[I].getAlignment() & AlignMask) == 0) {
35       auto *ZCPV =
36         static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal);
37       if (ZCPV->GV == GV && ZCPV->Modifier == Modifier)
38         return I;
39     }
40   }
41   return -1;
42 }
43 
44 void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
45   ID.AddPointer(GV);
46   ID.AddInteger(Modifier);
47 }
48 
49 void SystemZConstantPoolValue::print(raw_ostream &O) const {
50   O << GV << "@" << int(Modifier);
51 }
52