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cc474b4864
in the right direction. It eliminated some hacks and will unblock codegen work. But it's far from being done. It doesn't reject illegal expressions, e.g. (FOO - :lower16:BAR). It also doesn't work in Thumb2 mode at all. llvm-svn: 123369
74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
//===-- ARMMCExpr.cpp - ARM specific MC expression classes ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "armmcexpr"
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#include "ARMMCExpr.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCAssembler.h"
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using namespace llvm;
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const ARMMCExpr*
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ARMMCExpr::Create(VariantKind Kind, const MCExpr *Expr,
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MCContext &Ctx) {
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return new (Ctx) ARMMCExpr(Kind, Expr);
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}
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void ARMMCExpr::PrintImpl(raw_ostream &OS) const {
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switch (Kind) {
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default: assert(0 && "Invalid kind!");
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case VK_ARM_HI16: OS << ":upper16:"; break;
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case VK_ARM_LO16: OS << ":lower16:"; break;
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}
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const MCExpr *Expr = getSubExpr();
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if (Expr->getKind() != MCExpr::SymbolRef)
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OS << '(';
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Expr->print(OS);
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if (Expr->getKind() != MCExpr::SymbolRef)
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OS << ')';
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}
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bool
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ARMMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
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const MCAsmLayout *Layout) const {
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return false;
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}
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// FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
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// that method should be made public?
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static void AddValueSymbols_(const MCExpr *Value, MCAssembler *Asm) {
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switch (Value->getKind()) {
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case MCExpr::Target:
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assert(0 && "Can't handle nested target expr!");
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break;
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case MCExpr::Constant:
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break;
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case MCExpr::Binary: {
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const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
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AddValueSymbols_(BE->getLHS(), Asm);
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AddValueSymbols_(BE->getRHS(), Asm);
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break;
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}
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case MCExpr::SymbolRef:
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Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
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break;
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case MCExpr::Unary:
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AddValueSymbols_(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
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break;
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}
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}
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void ARMMCExpr::AddValueSymbols(MCAssembler *Asm) const {
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AddValueSymbols_(getSubExpr(), Asm);
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}
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