Extend StringRef's edit-distance algorithm to permit an upper bound on the allowed...

[oota-llvm.git] / include / llvm / ADT / Triple.h

diff --git a/include/llvm/ADT/Triple.h b/include/llvm/ADT/Triple.h
index c59f79e17b06fdea56c12b96da195d65d7b5231e..60f622d2dea710443a78fb1ac0a77d8761d89714 100644 (file)
--- a/include/llvm/ADT/Triple.h
+++ b/include/llvm/ADT/Triple.h
@@ -24,7 +24,7 @@ class Twine;
 
 /// Triple - Helper class for working with target triples.
 ///
-/// Target triples are strings in the format of:
+/// Target triples are strings in the canonical form:
 ///   ARCHITECTURE-VENDOR-OPERATING_SYSTEM
 /// or
 ///   ARCHITECTURE-VENDOR-OPERATING_SYSTEM-ENVIRONMENT
@@ -35,20 +35,11 @@ class Twine;
 /// from the components of the target triple to well known IDs.
 ///
 /// At its core the Triple class is designed to be a wrapper for a triple
-/// string; it does not normally change or normalize the triple string, instead
-/// it provides additional APIs to parse normalized parts out of the triple.
+/// string; the constructor does not change or normalize the triple string.
+/// Clients that need to handle the non-canonical triples that users often
+/// specify should use the normalize method.
 ///
-/// One curiosity this implies is that for some odd triples the results of,
-/// e.g., getOSName() can be very different from the result of getOS().  For
-/// example, for 'i386-mingw32', getOS() will return MinGW32, but since
-/// getOSName() is purely based on the string structure that will return the
-/// empty string.
-///
-/// Clients should generally avoid using getOSName() and related APIs unless
-/// they are familiar with the triple format (this is particularly true when
-/// rewriting a triple).
-///
-/// See autoconf/config.guess for a glimpse into what they look like in
+/// See autoconf/config.guess for a glimpse into what triples look like in
 /// practice.
 class Triple {
 public:
@@ -64,14 +55,17 @@ public:
     msp430,  // MSP430: msp430
     pic16,   // PIC16: pic16
     ppc,     // PPC: powerpc
-    ppc64,   // PPC64: powerpc64
+    ppc64,   // PPC64: powerpc64, ppu
     sparc,   // Sparc: sparc
+    sparcv9, // Sparcv9: Sparcv9
     systemz, // SystemZ: s390x
     tce,     // TCE (http://tce.cs.tut.fi/): tce
     thumb,   // Thumb: thumb, thumbv.*
     x86,     // X86: i[3-9]86
     x86_64,  // X86-64: amd64, x86_64
     xcore,   // XCore: xcore
+    mblaze,  // MBlaze: mblaze
+    ptx,     // PTX: ptx
 
     InvalidArch
   };
@@ -90,6 +84,7 @@ public:
     DragonFly,
     FreeBSD,
     Linux,
+    Lv2,        // PS3
     MinGW32,
     MinGW64,
     NetBSD,
@@ -97,7 +92,11 @@ public:
     Psp,
     Solaris,
     Win32,
-    Haiku
+    Haiku,
+    Minix
+  };
+  enum EnvironmentType {
+    UnknownEnvironment
   };
   
 private:
@@ -112,7 +111,14 @@ private:
   /// The parsed OS type.
   mutable OSType OS;
 
+  /// The parsed Environment type.
+  mutable EnvironmentType Environment;
+
   bool isInitialized() const { return Arch != InvalidArch; }
+  static ArchType ParseArch(StringRef ArchName);
+  static VendorType ParseVendor(StringRef VendorName);
+  static OSType ParseOS(StringRef OSName);
+  static EnvironmentType ParseEnvironment(StringRef EnvironmentName);
   void Parse() const;
 
 public:
@@ -129,6 +135,27 @@ public:
     Data += OSStr;
   }
 
+  explicit Triple(StringRef ArchStr, StringRef VendorStr, StringRef OSStr,
+    StringRef EnvironmentStr)
+    : Data(ArchStr), Arch(InvalidArch) {
+    Data += '-';
+    Data += VendorStr;
+    Data += '-';
+    Data += OSStr;
+    Data += '-';
+    Data += EnvironmentStr;
+  }
+
+  /// @}
+  /// @name Normalization
+  /// @{
+
+  /// normalize - Turn an arbitrary machine specification into the canonical
+  /// triple form (or something sensible that the Triple class understands if
+  /// nothing better can reasonably be done).  In particular, it handles the
+  /// common case in which otherwise valid components are in the wrong order.
+  static std::string normalize(StringRef Str);
+
   /// @}
   /// @name Typed Component Access
   /// @{
@@ -157,6 +184,12 @@ public:
     return getEnvironmentName() != "";
   }
 
+  /// getEnvironment - Get the parsed environment type of this triple.
+  EnvironmentType getEnvironment() const { 
+    if (!isInitialized()) Parse(); 
+    return Environment;
+  }
+
   /// @}
   /// @name Direct Component Access
   /// @{
@@ -216,6 +249,10 @@ public:
   /// to a known type.
   void setOS(OSType Kind);
 
+  /// setEnvironment - Set the environment (fourth) component of the triple
+  /// to a known type.
+  void setEnvironment(EnvironmentType Kind);
+
   /// setTriple - Set all components to the new triple \arg Str.
   void setTriple(const Twine &Str);
 
@@ -239,6 +276,10 @@ public:
   /// environment components with a single string.
   void setOSAndEnvironmentName(StringRef Str);
 
+  /// getArchNameForAssembler - Get an architecture name that is understood by
+  /// the target assembler.
+  const char *getArchNameForAssembler();
+
   /// @}
   /// @name Static helpers for IDs.
   /// @{
@@ -259,9 +300,14 @@ public:
   /// vendor.
   static const char *getVendorTypeName(VendorType Kind);
 
-  /// getOSTypeName - Get the canonical name for the \arg Kind vendor.
+  /// getOSTypeName - Get the canonical name for the \arg Kind operating
+  /// system.
   static const char *getOSTypeName(OSType Kind);
 
+  /// getEnvironmentTypeName - Get the canonical name for the \arg Kind
+  /// environment.
+  static const char *getEnvironmentTypeName(EnvironmentType Kind);
+
   /// @}
   /// @name Static helpers for converting alternate architecture names.
   /// @{