mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-20 03:23:01 +02:00
be0ced1166
Summary:
This is much closer to the way MIPS relocation expressions work
(%hi(foo + 2) rather than %hi(foo) + 2) and removes the need for the
various bodges in MipsAsmParser::evaluateRelocExpr().
Removing those bodges ensures that the constant stored in MCValue is the
full 32 or 64-bit (depending on ABI) offset from the symbol. This will be used
to correct the %hi/%lo matching needed to sort the relocation table correctly.
As part of this:
* Gave MCExpr::print() the ability to omit parenthesis when emitting a
symbol reference inside a MipsMCExpr operator like %hi(X). Without this
we print things like %lo(($L1)).
* %hi(%neg(%gprel(X))) is now three MipsMCExpr's instead of one. Most of
the related special cases have been removed or moved to MipsMCExpr. We
can remove the rest as we gain support for the less common relocations
when they are not part of this specific combination.
* Renamed MipsMCExpr::VariantKind and the enum prefix ('VK_') to avoid confusion
with MCSymbolRefExpr::VariantKind and its prefix (also 'VK_').
* fixup_Mips_GOT_Local and fixup_Mips_GOT_Global were found to be identical
and merged into fixup_Mips_GOT.
* MO_GOT16 and MO_GOT turned out to be identical and have been merged into
MO_GOT.
* VK_Mips_GOT and VK_Mips_GOT16 turned out to be the same thing so they
have been merged into MEK_GOT
Reviewers: sdardis
Subscribers: dsanders, sdardis, llvm-commits
Differential Revision: http://reviews.llvm.org/D19716
llvm-svn: 268379
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
//===-- MipsBaseInfo.h - Top level definitions for MIPS MC ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains small standalone helper functions and enum definitions for
|
|
// the Mips target useful for the compiler back-end and the MC libraries.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSBASEINFO_H
|
|
#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSBASEINFO_H
|
|
|
|
#include "MipsFixupKinds.h"
|
|
#include "MipsMCTargetDesc.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// MipsII - This namespace holds all of the target specific flags that
|
|
/// instruction info tracks.
|
|
///
|
|
namespace MipsII {
|
|
/// Target Operand Flag enum.
|
|
enum TOF {
|
|
//===------------------------------------------------------------------===//
|
|
// Mips Specific MachineOperand flags.
|
|
|
|
MO_NO_FLAG,
|
|
|
|
/// MO_GOT - Represents the offset into the global offset table at which
|
|
/// the address the relocation entry symbol resides during execution.
|
|
MO_GOT,
|
|
|
|
/// MO_GOT_CALL - Represents the offset into the global offset table at
|
|
/// which the address of a call site relocation entry symbol resides
|
|
/// during execution. This is different from the above since this flag
|
|
/// can only be present in call instructions.
|
|
MO_GOT_CALL,
|
|
|
|
/// MO_GPREL - Represents the offset from the current gp value to be used
|
|
/// for the relocatable object file being produced.
|
|
MO_GPREL,
|
|
|
|
/// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
|
|
/// address.
|
|
MO_ABS_HI,
|
|
MO_ABS_LO,
|
|
|
|
/// MO_TLSGD - Represents the offset into the global offset table at which
|
|
// the module ID and TSL block offset reside during execution (General
|
|
// Dynamic TLS).
|
|
MO_TLSGD,
|
|
|
|
/// MO_TLSLDM - Represents the offset into the global offset table at which
|
|
// the module ID and TSL block offset reside during execution (Local
|
|
// Dynamic TLS).
|
|
MO_TLSLDM,
|
|
MO_DTPREL_HI,
|
|
MO_DTPREL_LO,
|
|
|
|
/// MO_GOTTPREL - Represents the offset from the thread pointer (Initial
|
|
// Exec TLS).
|
|
MO_GOTTPREL,
|
|
|
|
/// MO_TPREL_HI/LO - Represents the hi and low part of the offset from
|
|
// the thread pointer (Local Exec TLS).
|
|
MO_TPREL_HI,
|
|
MO_TPREL_LO,
|
|
|
|
// N32/64 Flags.
|
|
MO_GPOFF_HI,
|
|
MO_GPOFF_LO,
|
|
MO_GOT_DISP,
|
|
MO_GOT_PAGE,
|
|
MO_GOT_OFST,
|
|
|
|
/// MO_HIGHER/HIGHEST - Represents the highest or higher half word of a
|
|
/// 64-bit symbol address.
|
|
MO_HIGHER,
|
|
MO_HIGHEST,
|
|
|
|
/// MO_GOT_HI16/LO16, MO_CALL_HI16/LO16 - Relocations used for large GOTs.
|
|
MO_GOT_HI16,
|
|
MO_GOT_LO16,
|
|
MO_CALL_HI16,
|
|
MO_CALL_LO16
|
|
};
|
|
|
|
enum {
|
|
//===------------------------------------------------------------------===//
|
|
// Instruction encodings. These are the standard/most common forms for
|
|
// Mips instructions.
|
|
//
|
|
|
|
// Pseudo - This represents an instruction that is a pseudo instruction
|
|
// or one that has not been implemented yet. It is illegal to code generate
|
|
// it, but tolerated for intermediate implementation stages.
|
|
Pseudo = 0,
|
|
|
|
/// FrmR - This form is for instructions of the format R.
|
|
FrmR = 1,
|
|
/// FrmI - This form is for instructions of the format I.
|
|
FrmI = 2,
|
|
/// FrmJ - This form is for instructions of the format J.
|
|
FrmJ = 3,
|
|
/// FrmFR - This form is for instructions of the format FR.
|
|
FrmFR = 4,
|
|
/// FrmFI - This form is for instructions of the format FI.
|
|
FrmFI = 5,
|
|
/// FrmOther - This form is for instructions that have no specific format.
|
|
FrmOther = 6,
|
|
|
|
FormMask = 15,
|
|
/// IsCTI - Instruction is a Control Transfer Instruction.
|
|
IsCTI = 1 << 4,
|
|
/// HasForbiddenSlot - Instruction has a forbidden slot.
|
|
HasForbiddenSlot = 1 << 5
|
|
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|