mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-26 06:22:56 +02:00
dda3f1317e
This starts merging MCSection and MCSectionData. There are a few issues with the current split between MCSection and MCSectionData. * It optimizes the the not as important case. We want the production of .o files to be really fast, but the split puts the information used for .o emission in a separate data structure. * The ELF/COFF/MachO hierarchy is not represented in MCSectionData, leading to some ad-hoc ways to represent the various flags. * It makes it harder to remember where each item is. The attached patch starts merging the two by moving the alignment from MCSectionData to MCSection. Most of the patch is actually just dropping 'const', since MCSectionData is mutable, but MCSection was not. llvm-svn: 237936
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
//===-- llvm/CodeGen/AddressPool.h - Dwarf Debug Framework -----*- C++ -*--===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
|
|
#define LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
|
|
namespace llvm {
|
|
class MCSection;
|
|
class MCSymbol;
|
|
class AsmPrinter;
|
|
// Collection of addresses for this unit and assorted labels.
|
|
// A Symbol->unsigned mapping of addresses used by indirect
|
|
// references.
|
|
class AddressPool {
|
|
struct AddressPoolEntry {
|
|
unsigned Number;
|
|
bool TLS;
|
|
AddressPoolEntry(unsigned Number, bool TLS) : Number(Number), TLS(TLS) {}
|
|
};
|
|
DenseMap<const MCSymbol *, AddressPoolEntry> Pool;
|
|
|
|
/// Record whether the AddressPool has been queried for an address index since
|
|
/// the last "resetUsedFlag" call. Used to implement type unit fallback - a
|
|
/// type that references addresses cannot be placed in a type unit when using
|
|
/// fission.
|
|
bool HasBeenUsed;
|
|
|
|
public:
|
|
AddressPool() : HasBeenUsed(false) {}
|
|
|
|
/// \brief Returns the index into the address pool with the given
|
|
/// label/symbol.
|
|
unsigned getIndex(const MCSymbol *Sym, bool TLS = false);
|
|
|
|
void emit(AsmPrinter &Asm, MCSection *AddrSection);
|
|
|
|
bool isEmpty() { return Pool.empty(); }
|
|
|
|
bool hasBeenUsed() const { return HasBeenUsed; }
|
|
|
|
void resetUsedFlag() { HasBeenUsed = false; }
|
|
};
|
|
}
|
|
#endif
|