//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/Support/Debug.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);
-/// NeedsQuoting - Return true if the string \arg Str needs quoting, i.e., it
-/// does not match [a-zA-Z_.][a-zA-Z0-9_.]*.
-//
-// FIXME: This could be more permissive, do we care?
-static inline bool NeedsQuoting(const StringRef &Str) {
- if (Str.empty())
- return true;
-
- // Check that first character is in [a-zA-Z_.].
- if (!((Str[0] >= 'a' && Str[0] <= 'z') ||
- (Str[0] >= 'A' && Str[0] <= 'Z') ||
- (Str[0] == '_' || Str[0] == '.')))
- return true;
-
- // Check subsequent characters are in [a-zA-Z0-9_.].
- for (unsigned i = 1, e = Str.size(); i != e; ++i)
- if (!((Str[i] >= 'a' && Str[i] <= 'z') ||
- (Str[i] >= 'A' && Str[i] <= 'Z') ||
- (Str[i] >= '0' && Str[i] <= '9') ||
- (Str[i] == '_' || Str[i] == '.')))
- return true;
+static bool isAcceptableChar(char C) {
+ if ((C < 'a' || C > 'z') &&
+ (C < 'A' || C > 'Z') &&
+ (C < '0' || C > '9') &&
+ C != '_' && C != '$' && C != '.' && C != '@')
+ return false;
+ return true;
+}
+/// NameNeedsQuoting - Return true if the identifier \arg Str needs quotes to be
+/// syntactically correct.
+static bool NameNeedsQuoting(StringRef Str) {
+ assert(!Str.empty() && "Cannot create an empty MCSymbol");
+
+ // If any of the characters in the string is an unacceptable character, force
+ // quotes.
+ for (unsigned i = 0, e = Str.size(); i != e; ++i)
+ if (!isAcceptableChar(Str[i]))
+ return true;
return false;
}
+const MCSymbol &MCSymbol::AliasedSymbol() const {
+ const MCSymbol *S = this;
+ while (S->isVariable()) {
+ const MCExpr *Value = S->getVariableValue();
+ if (Value->getKind() != MCExpr::SymbolRef)
+ return *S;
+ const MCSymbolRefExpr *Ref = static_cast<const MCSymbolRefExpr*>(Value);
+ S = &Ref->getSymbol();
+ }
+ return *S;
+}
+
+void MCSymbol::setVariableValue(const MCExpr *Value) {
+ assert(!IsUsed && "Cannot set a variable that has already been used.");
+ assert(Value && "Invalid variable value!");
+ assert((isUndefined() || (isAbsolute() && isa<MCConstantExpr>(Value))) &&
+ "Invalid redefinition!");
+ this->Value = Value;
+
+ // Mark the variable as absolute as appropriate.
+ if (isa<MCConstantExpr>(Value))
+ setAbsolute();
+}
+
void MCSymbol::print(raw_ostream &OS) const {
- if (NeedsQuoting(getName()))
- OS << '"' << getName() << '"';
- else
+ // 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.
+ if (!NameNeedsQuoting(getName())) {
OS << getName();
+ return;
+ }
+
+ OS << '"' << getName() << '"';
}
void MCSymbol::dump() const {
- print(errs());
+ print(dbgs());
}