/// Emit something like ".long Hi+Offset-Lo" where the size in bytes of the
/// directive is specified by Size and Hi/Lo specify the labels.
static void emitLabelOffsetDifference(MCStreamer &Streamer, const MCSymbol *Hi,
uint64_t Offset, const MCSymbol *Lo,
unsigned Size) {
MCContext &Context = Streamer.getContext();
// Emit Hi+Offset - Lo
// Get the Hi+Offset expression.
const MCExpr *Plus =
MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Hi, Context),
MCConstantExpr::Create(Offset, Context), Context);
// Get the Hi+Offset-Lo expression.
const MCExpr *Diff = MCBinaryExpr::CreateSub(
Plus, MCSymbolRefExpr::Create(Lo, Context), Context);
// Otherwise, emit with .set (aka assignment).
MCSymbol *SetLabel = Context.CreateTempSymbol();
Streamer.EmitAssignment(SetLabel, Diff);
Streamer.EmitSymbolValue(SetLabel, Size);
}
void MCContext::setSymbolValue(MCStreamer &Streamer,
StringRef Sym,
uint64_t Val) {
auto Symbol = getOrCreateSymbol(Sym);
Streamer.EmitAssignment(Symbol, MCConstantExpr::create(Val, *this));
}
