#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
// Sentinel value for the absolute pseudo section.
-const MCSection *MCSymbol::AbsolutePseudoSection =
- reinterpret_cast<const MCSection *>(1);
-
-/// ShouldQuoteIdentifier - Return true if the identifier \arg Str needs quotes
-/// for this assembler.
-static bool ShouldQuoteIdentifier(const StringRef &Str, const MCAsmInfo &MAI) {
- // If the assembler doesn't support quotes, never use them.
- if (!MAI.doesAllowQuotesInName())
- return false;
-
- // If empty, we need quotes.
- if (Str.empty())
- return true;
-
- // If the first character is a number, we need quotes.
- if (Str[0] >= '0' && Str[0] <= '9')
- return true;
-
- // If any of the characters in the string is an unacceptable character, force
- // quotes.
- for (unsigned i = 0, e = Str.size(); i != e; ++i) {
- char C = Str[i];
-
- if ((C < 'a' || C > 'z') &&
- (C < 'A' || C > 'Z') &&
- (C < '0' || C > '9') &&
- C != '_' && C != '$' && C != '.')
- return true;
- }
- return false;
+MCSection *MCSymbol::AbsolutePseudoSection = reinterpret_cast<MCSection *>(1);
+
+void *MCSymbol::operator new(size_t s, const StringMapEntry<bool> *Name,
+ MCContext &Ctx) {
+ // We may need more space for a Name to account for alignment. So allocate
+ // space for the storage type and not the name pointer.
+ size_t Size = s + (Name ? sizeof(NameEntryStorageTy) : 0);
+
+ // For safety, ensure that the alignment of a pointer is enough for an
+ // MCSymbol. This also ensures we don't need padding between the name and
+ // symbol.
+ static_assert((unsigned)AlignOf<MCSymbol>::Alignment <=
+ AlignOf<NameEntryStorageTy>::Alignment,
+ "Bad alignment of MCSymbol");
+ void *Storage = Ctx.allocate(Size, alignOf<NameEntryStorageTy>());
+ NameEntryStorageTy *Start = static_cast<NameEntryStorageTy*>(Storage);
+ NameEntryStorageTy *End = Start + (Name ? 1 : 0);
+ return End;
}
-void MCSymbol::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
- if (!MAI || ShouldQuoteIdentifier(getName(), *MAI))
- OS << '"' << getName() << '"';
- else
- OS << getName();
+void MCSymbol::setVariableValue(const MCExpr *Value) {
+ assert(!IsUsed && "Cannot set a variable that has already been used.");
+ assert(Value && "Invalid variable value!");
+ assert((SymbolContents == SymContentsUnset ||
+ SymbolContents == SymContentsVariable) &&
+ "Cannot give common/offset symbol a variable value");
+ this->Value = Value;
+ SymbolContents = SymContentsVariable;
+ setUndefined();
}
-void MCSymbol::dump() const {
- print(errs(), 0);
+void MCSymbol::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
+ // The name for this MCSymbol is required to be a valid target name. However,
+ // some targets support quoting names with funny characters. If the name
+ // contains a funny character, then print it quoted.
+ StringRef Name = getName();
+ if (!MAI || MAI->isValidUnquotedName(Name)) {
+ OS << Name;
+ return;
+ }
+
+ if (MAI && !MAI->supportsNameQuoting())
+ report_fatal_error("Symbol name with unsupported characters");
+
+ OS << '"';
+ for (char C : Name) {
+ if (C == '\n')
+ OS << "\\n";
+ else if (C == '"')
+ OS << "\\\"";
+ else
+ OS << C;
+ }
+ OS << '"';
}
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+void MCSymbol::dump() const { dbgs() << *this; }
+#endif