llvm-6502/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h
Sasa Stankovic 10914379f6 [mips] Extend MipsMCExpr class to handle %higher(sym1 - sym2 + const) and
%highest(sym1 - sym2 + const) relocations. Remove "ABS_" from VK_Mips_HI
and VK_Mips_LO enums in MipsMCExpr, to be consistent with VK_Mips_HIGHER
and VK_Mips_HIGHEST.

This change also deletes test file test/MC/Mips/higher_highest.ll and moves
its CHECK's to the new test file test/MC/Mips/higher-highest-addressing.s.
The deleted file tests that R_MIPS_HIGHER and R_MIPS_HIGHEST relocations are
emitted in the .o file. Since it uses -force-mips-long-branch option, it was
created when MipsLongBranch's implementation was emitting R_MIPS_HIGHER and
R_MIPS_HIGHEST relocations in the .o file. It was disabled when MipsLongBranch
started to directly calculate offsets.

Differential Revision: http://llvm-reviews.chandlerc.com/D3230


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205522 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-03 10:37:45 +00:00

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1.8 KiB
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//===-- MipsMCExpr.h - Mips specific MC expression classes ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef MIPSMCEXPR_H
#define MIPSMCEXPR_H
#include "llvm/MC/MCAsmLayout.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCValue.h"
namespace llvm {
class MipsMCExpr : public MCTargetExpr {
public:
enum VariantKind {
VK_Mips_None,
VK_Mips_LO,
VK_Mips_HI,
VK_Mips_HIGHER,
VK_Mips_HIGHEST
};
private:
const VariantKind Kind;
const MCExpr *Expr;
explicit MipsMCExpr(VariantKind Kind, const MCExpr *Expr)
: Kind(Kind), Expr(Expr) {}
public:
static bool isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,
const MCBinaryExpr *BE);
static const MipsMCExpr *Create(MCSymbolRefExpr::VariantKind VK,
const MCExpr *Expr, MCContext &Ctx);
/// getOpcode - Get the kind of this expression.
VariantKind getKind() const { return Kind; }
/// getSubExpr - Get the child of this expression.
const MCExpr *getSubExpr() const { return Expr; }
void PrintImpl(raw_ostream &OS) const;
bool EvaluateAsRelocatableImpl(MCValue &Res,
const MCAsmLayout *Layout) const;
void AddValueSymbols(MCAssembler *) const;
const MCSection *FindAssociatedSection() const {
return getSubExpr()->FindAssociatedSection();
}
// There are no TLS MipsMCExprs at the moment.
void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {}
static bool classof(const MCExpr *E) {
return E->getKind() == MCExpr::Target;
}
};
} // end namespace llvm
#endif