X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FTwine.cpp;h=3d04bc34f0eb8d63ad023af7bcbb5a3e4d38d8ff;hb=adf01b3f18442ae8db6b8948e70d82d9df415119;hp=83a3a6180f3f6e578860437131f434551018d501;hpb=0fffbafa9609e0e289ff3120ab9e23d244c1dbc0;p=oota-llvm.git

diff --git a/lib/Support/Twine.cpp b/lib/Support/Twine.cpp
index 83a3a6180f3..3d04bc34f0e 100644
--- a/lib/Support/Twine.cpp
+++ b/lib/Support/Twine.cpp
@@ -8,64 +8,98 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/Twine.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 std::string Twine::str() const {
-  std::string Res;
-  raw_string_ostream OS(Res);
-  print(OS);
-  return Res;
+  // If we're storing only a std::string, just return it.
+  if (LHSKind == StdStringKind && RHSKind == EmptyKind)
+    return *LHS.stdString;
+
+  // Otherwise, flatten and copy the contents first.
+  SmallString<256> Vec;
+  return toStringRef(Vec).str();
 }
 
 void Twine::toVector(SmallVectorImpl<char> &Out) const {
-  // FIXME: This is very inefficient, since we are creating a large raw_ostream
-  // buffer -- hitting malloc, which we were supposed to avoid -- all when we
-  // have this pretty little small vector available.
-  //
-  // The best way to fix this is to make raw_svector_ostream do the right thing
-  // and be efficient, by augmenting the base raw_ostream with the ability to
-  // have the buffer managed by a concrete implementation.
   raw_svector_ostream OS(Out);
   print(OS);
 }
 
-void Twine::printOneChild(raw_ostream &OS, const void *Ptr, 
+StringRef Twine::toStringRef(SmallVectorImpl<char> &Out) const {
+  if (isSingleStringRef())
+    return getSingleStringRef();
+  toVector(Out);
+  return StringRef(Out.data(), Out.size());
+}
+
+StringRef Twine::toNullTerminatedStringRef(SmallVectorImpl<char> &Out) const {
+  if (isUnary()) {
+    switch (getLHSKind()) {
+    case CStringKind:
+      // Already null terminated, yay!
+      return StringRef(LHS.cString);
+    case StdStringKind: {
+      const std::string *str = LHS.stdString;
+      return StringRef(str->c_str(), str->size());
+    }
+    default:
+      break;
+    }
+  }
+  toVector(Out);
+  Out.push_back(0);
+  Out.pop_back();
+  return StringRef(Out.data(), Out.size());
+}
+
+void Twine::printOneChild(raw_ostream &OS, Child Ptr,
                           NodeKind Kind) const {
   switch (Kind) {
   case Twine::NullKind: break;
   case Twine::EmptyKind: break;
   case Twine::TwineKind:
-    static_cast<const Twine*>(Ptr)->print(OS); 
+    Ptr.twine->print(OS);
     break;
-  case Twine::CStringKind: 
-    OS << static_cast<const char*>(Ptr); 
+  case Twine::CStringKind:
+    OS << Ptr.cString;
     break;
   case Twine::StdStringKind:
-    OS << *static_cast<const std::string*>(Ptr); 
+    OS << *Ptr.stdString;
     break;
   case Twine::StringRefKind:
-    OS << *static_cast<const StringRef*>(Ptr); 
+    OS << *Ptr.stringRef;
+    break;
+  case Twine::CharKind:
+    OS << Ptr.character;
+    break;
+  case Twine::DecUIKind:
+    OS << Ptr.decUI;
+    break;
+  case Twine::DecIKind:
+    OS << Ptr.decI;
     break;
-  case Twine::UDec32Kind:
-    OS << *static_cast<const uint32_t*>(Ptr);
+  case Twine::DecULKind:
+    OS << *Ptr.decUL;
     break;
-  case Twine::SDec32Kind:
-    OS << *static_cast<const int32_t*>(Ptr);
+  case Twine::DecLKind:
+    OS << *Ptr.decL;
     break;
-  case Twine::UDec64Kind:
-    OS << *static_cast<const uint64_t*>(Ptr);
+  case Twine::DecULLKind:
+    OS << *Ptr.decULL;
     break;
-  case Twine::SDec64Kind:
-    OS << *static_cast<const int64_t*>(Ptr);
+  case Twine::DecLLKind:
+    OS << *Ptr.decLL;
     break;
   case Twine::UHexKind:
-    OS.write_hex(*static_cast<const uint64_t*>(Ptr));
+    OS.write_hex(*Ptr.uHex);
     break;
   }
 }
 
-void Twine::printOneChildRepr(raw_ostream &OS, const void *Ptr, 
+void Twine::printOneChildRepr(raw_ostream &OS, Child Ptr,
                               NodeKind Kind) const {
   switch (Kind) {
   case Twine::NullKind:
@@ -74,34 +108,43 @@ void Twine::printOneChildRepr(raw_ostream &OS, const void *Ptr,
     OS << "empty"; break;
   case Twine::TwineKind:
     OS << "rope:";
-    static_cast<const Twine*>(Ptr)->printRepr(OS);
+    Ptr.twine->printRepr(OS);
     break;
   case Twine::CStringKind:
     OS << "cstring:\""
-       << static_cast<const char*>(Ptr) << "\"";
+       << Ptr.cString << "\"";
     break;
   case Twine::StdStringKind:
     OS << "std::string:\""
-       << static_cast<const std::string*>(Ptr) << "\"";
+       << Ptr.stdString << "\"";
     break;
   case Twine::StringRefKind:
     OS << "stringref:\""
-       << static_cast<const StringRef*>(Ptr) << "\"";
+       << Ptr.stringRef << "\"";
+    break;
+  case Twine::CharKind:
+    OS << "char:\"" << Ptr.character << "\"";
+    break;
+  case Twine::DecUIKind:
+    OS << "decUI:\"" << Ptr.decUI << "\"";
+    break;
+  case Twine::DecIKind:
+    OS << "decI:\"" << Ptr.decI << "\"";
     break;
-  case Twine::UDec32Kind:
-    OS << "udec32:" << static_cast<const uint64_t*>(Ptr) << "\"";
+  case Twine::DecULKind:
+    OS << "decUL:\"" << *Ptr.decUL << "\"";
     break;
-  case Twine::SDec32Kind:
-    OS << "sdec32:" << static_cast<const int64_t*>(Ptr) << "\"";
+  case Twine::DecLKind:
+    OS << "decL:\"" << *Ptr.decL << "\"";
     break;
-  case Twine::UDec64Kind:
-    OS << "udec64:" << static_cast<const uint64_t*>(Ptr) << "\"";
+  case Twine::DecULLKind:
+    OS << "decULL:\"" << *Ptr.decULL << "\"";
     break;
-  case Twine::SDec64Kind:
-    OS << "sdec64:" << static_cast<const int64_t*>(Ptr) << "\"";
+  case Twine::DecLLKind:
+    OS << "decLL:\"" << *Ptr.decLL << "\"";
     break;
   case Twine::UHexKind:
-    OS << "uhex:" << static_cast<const uint64_t*>(Ptr) << "\"";
+    OS << "uhex:\"" << Ptr.uHex << "\"";
     break;
   }
 }
@@ -120,9 +163,9 @@ void Twine::printRepr(raw_ostream &OS) const {
 }
 
 void Twine::dump() const {
-  print(llvm::errs());
+  print(llvm::dbgs());
 }
 
 void Twine::dumpRepr() const {
-  printRepr(llvm::errs());
+  printRepr(llvm::dbgs());
 }