LLVM 17.0.0git
TableManager.h
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1//===---------------------- TableManager.h ----------------------*- 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//
9// Fix edge for edge that needs an entry to reference the target symbol
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_EXECUTIONENGINE_JITLINK_TABLEMANAGER_H
14#define LLVM_EXECUTIONENGINE_JITLINK_TABLEMANAGER_H
15
17#include "llvm/Support/Debug.h"
18
19namespace llvm {
20namespace jitlink {
21
22/// A CRTP base for tables that are built on demand, e.g. Global Offset Tables
23/// and Procedure Linkage Tables.
24/// The getEntyrForTarget function returns the table entry corresponding to the
25/// given target, calling down to the implementation class to build an entry if
26/// one does not already exist.
27template <typename TableManagerImplT> class TableManager {
28public:
29 /// Return the constructed entry
30 ///
31 /// Use parameter G to construct the entry for target symbol
33 assert(Target.hasName() && "Edge cannot point to anonymous target");
34
35 auto EntryI = Entries.find(Target.getName());
36
37 // Build the entry if it doesn't exist.
38 if (EntryI == Entries.end()) {
39 auto &Entry = impl().createEntry(G, Target);
40 DEBUG_WITH_TYPE("jitlink", {
41 dbgs() << " Created " << impl().getSectionName() << "entry for "
42 << Target.getName() << ": " << Entry << "\n";
43 });
44 EntryI = Entries.insert(std::make_pair(Target.getName(), &Entry)).first;
45 }
46
47 assert(EntryI != Entries.end() && "Could not get entry symbol");
48 DEBUG_WITH_TYPE("jitlink", {
49 dbgs() << " Using " << impl().getSectionName() << " entry "
50 << *EntryI->second << "\n";
51 });
52 return *EntryI->second;
53 }
54
55private:
56 TableManagerImplT &impl() { return static_cast<TableManagerImplT &>(*this); }
58};
59
60} // namespace jitlink
61} // namespace llvm
62
63#endif
#define DEBUG_WITH_TYPE(TYPE, X)
DEBUG_WITH_TYPE macro - This macro should be used by passes to emit debug information.
Definition: Debug.h:64
#define G(x, y, z)
Definition: MD5.cpp:56
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
Target - Wrapper for Target specific information.
const char * getName() const
getName - Get the target name.
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163