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1 //===-- SystemZConstantPoolValue.cpp - SystemZ constant-pool value --------===//
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 
10 #include "SystemZConstantPoolValue.h"
11 #include "llvm/ADT/FoldingSet.h"
12 #include "llvm/IR/DerivedTypes.h"
13 #include "llvm/IR/GlobalValue.h"
14 #include "llvm/Support/raw_ostream.h"
15 
16 using namespace llvm;
17 
18 SystemZConstantPoolValue::
SystemZConstantPoolValue(const GlobalValue * gv,SystemZCP::SystemZCPModifier modifier)19 SystemZConstantPoolValue(const GlobalValue *gv,
20                          SystemZCP::SystemZCPModifier modifier)
21   : MachineConstantPoolValue(gv->getType()), GV(gv), Modifier(modifier) {}
22 
23 SystemZConstantPoolValue *
Create(const GlobalValue * GV,SystemZCP::SystemZCPModifier Modifier)24 SystemZConstantPoolValue::Create(const GlobalValue *GV,
25                                  SystemZCP::SystemZCPModifier Modifier) {
26   return new SystemZConstantPoolValue(GV, Modifier);
27 }
28 
29 int SystemZConstantPoolValue::
getExistingMachineCPValue(MachineConstantPool * CP,unsigned Alignment)30 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
31   unsigned AlignMask = Alignment - 1;
32   const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
33   for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
34     if (Constants[I].isMachineConstantPoolEntry() &&
35         (Constants[I].getAlignment() & AlignMask) == 0) {
36       auto *ZCPV =
37         static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal);
38       if (ZCPV->GV == GV && ZCPV->Modifier == Modifier)
39         return I;
40     }
41   }
42   return -1;
43 }
44 
addSelectionDAGCSEId(FoldingSetNodeID & ID)45 void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
46   ID.AddPointer(GV);
47   ID.AddInteger(Modifier);
48 }
49 
print(raw_ostream & O) const50 void SystemZConstantPoolValue::print(raw_ostream &O) const {
51   O << GV << "@" << int(Modifier);
52 }
53