1 //===- MCFixup.cpp - Assembly Fixup Implementation ------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCFixup.h"
13 static MCSymbolRefExpr::VariantKind getAccessVariant(const MCExpr *Expr) {
14 switch (Expr->getKind()) {
16 assert(getAccessVariant(cast<MCUnaryExpr>(Expr)->getSubExpr()) ==
17 MCSymbolRefExpr::VK_None);
18 return MCSymbolRefExpr::VK_None;
22 llvm_unreachable("unsupported");
24 case MCExpr::Constant:
25 return MCSymbolRefExpr::VK_None;
27 case MCExpr::SymbolRef: {
28 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(Expr);
29 return SRE->getKind();
31 case MCExpr::Binary: {
32 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(Expr);
33 assert(getAccessVariant(ABE->getRHS()) == MCSymbolRefExpr::VK_None);
34 return getAccessVariant(ABE->getLHS());
37 llvm_unreachable("unknown MCExpr kind");
40 MCSymbolRefExpr::VariantKind MCFixup::getAccessVariant() const {
41 return ::getAccessVariant(getValue());