LLVM  9.0.0svn
ARMMCExpr.cpp
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1 //===-- ARMMCExpr.cpp - ARM specific MC expression classes ----------------===//
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 #include "ARMMCExpr.h"
10 #include "llvm/MC/MCContext.h"
11 #include "llvm/MC/MCStreamer.h"
12 using namespace llvm;
13 
14 #define DEBUG_TYPE "armmcexpr"
15 
16 const ARMMCExpr*
18  MCContext &Ctx) {
19  return new (Ctx) ARMMCExpr(Kind, Expr);
20 }
21 
22 void ARMMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
23  switch (Kind) {
24  default: llvm_unreachable("Invalid kind!");
25  case VK_ARM_HI16: OS << ":upper16:"; break;
26  case VK_ARM_LO16: OS << ":lower16:"; break;
27  }
28 
29  const MCExpr *Expr = getSubExpr();
30  if (Expr->getKind() != MCExpr::SymbolRef)
31  OS << '(';
32  Expr->print(OS, MAI);
33  if (Expr->getKind() != MCExpr::SymbolRef)
34  OS << ')';
35 }
36 
37 void ARMMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
38  Streamer.visitUsedExpr(*getSubExpr());
39 }
This class represents lattice values for constants.
Definition: AllocatorList.h:23
static const ARMMCExpr * create(VariantKind Kind, const MCExpr *Expr, MCContext &Ctx)
Definition: ARMMCExpr.cpp:17
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
Context object for machine code objects.
Definition: MCContext.h:62
void visitUsedExpr(MCStreamer &Streamer) const override
Definition: ARMMCExpr.cpp:37
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
Streaming machine code generation interface.
Definition: MCStreamer.h:188
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:41
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
ExprKind getKind() const
Definition: MCExpr.h:72
void visitUsedExpr(const MCExpr &Expr)
Definition: MCStreamer.cpp:934
void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override
Definition: ARMMCExpr.cpp:22
const MCExpr * getSubExpr() const
getSubExpr - Get the child of this expression.
Definition: ARMMCExpr.h:54
References to labels and assigned expressions.
Definition: MCExpr.h:40
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45