Add files Sanjiv forgot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84196 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 487 insertions, 0 deletions

diff --git a/lib/Target/PIC16/PIC16ABINames.h b/lib/Target/PIC16/PIC16ABINames.h
new file mode 100644
index 0000000000..00e9e45714
--- /dev/null
+++ b/lib/Target/PIC16/PIC16ABINames.h
@@ -0,0 +1,305 @@
+//===-- PIC16ABINames.h - PIC16 Naming conventios for ABI----- --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source 
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the functions to manage ABI Naming conventions for PIC16. 
+// 
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_PIC16ABINAMES_H
+#define LLVM_TARGET_PIC16ABINAMES_H
+
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Target/TargetMachine.h"
+#include <cassert>
+#include <sstream>
+#include <cstring>
+#include <string>
+
+namespace llvm {
+  class PIC16TargetMachine;
+  class FunctionPass;
+  class MachineCodeEmitter;
+  class formatted_raw_ostream;
+
+  // A Central class to manage all ABI naming conventions.
+  // PAN - [P]ic16 [A]BI [N]ames
+  class PAN {
+    public:
+    // Map the name of the symbol to its section name.
+    // Current ABI:
+    // -----------------------------------------------------
+    // ALL Names are prefixed with the symobl '@'.
+    // ------------------------------------------------------
+    // Global variables do not have any '.' in their names.
+    // These are maily function names and global variable names.
+    // Example - @foo,  @i
+    // -------------------------------------------------------
+    // Functions and auto variables.
+    // Names are mangled as <prefix><funcname>.<tag>.<varname>
+    // Where <prefix> is '@' and <tag> is any one of
+    // the following
+    // .auto. - an automatic var of a function.
+    // .temp. - temproray data of a function.
+    // .ret.  - return value label for a function.
+    // .frame. - Frame label for a function where retval, args
+    //           and temps are stored.
+    // .args. - Label used to pass arguments to a direct call.
+    // Example - Function name:   @foo
+    //           Its frame:       @foo.frame.
+    //           Its retval:      @foo.ret.
+    //           Its local vars:  @foo.auto.a
+    //           Its temp data:   @foo.temp.
+    //           Its arg passing: @foo.args.
+    //----------------------------------------------
+    // Libcall - compiler generated libcall names must start with .lib.
+    //           This id will be used to emit extern decls for libcalls.
+    // Example - libcall name:   @.lib.sra.i8
+    //           To pass args:   @.lib.sra.i8.args.
+    //           To return val:  @.lib.sra.i8.ret.
+    //----------------------------------------------
+    // SECTION Names
+    // uninitialized globals - @udata.<num>.#
+    // initialized globals - @idata.<num>.#
+    // Function frame - @<func>.frame_section.
+    // Function autos - @<func>.autos_section.
+    // Declarations - Enclosed in comments. No section for them.
+    //----------------------------------------------------------
+    
+    // Tags used to mangle different names. 
+    enum TAGS {
+      PREFIX_SYMBOL,
+      GLOBAL,
+      STATIC_LOCAL,
+      AUTOS_LABEL,
+      FRAME_LABEL,
+      RET_LABEL,
+      ARGS_LABEL,
+      TEMPS_LABEL,
+      
+      LIBCALL,
+      
+      FRAME_SECTION,
+      AUTOS_SECTION,
+      CODE_SECTION,
+      USER_SECTION
+    };
+
+    // Textual names of the tags.
+    inline static const char *getTagName(TAGS tag) {
+      switch (tag) {
+      default: return "";
+      case PREFIX_SYMBOL:    return "@";
+      case AUTOS_LABEL:       return ".auto.";
+      case FRAME_LABEL:       return ".frame.";
+      case TEMPS_LABEL:       return ".temp.";
+      case ARGS_LABEL:       return ".args.";
+      case RET_LABEL:       return ".ret.";
+      case LIBCALL:       return ".lib.";
+      case FRAME_SECTION:       return ".frame_section.";
+      case AUTOS_SECTION:       return ".autos_section.";
+      case CODE_SECTION:       return ".code_section.";
+      case USER_SECTION:       return ".user_section.";
+      }
+    }
+
+    // Get tag type for the Symbol.
+    inline static TAGS getSymbolTag(const std::string &Sym) {
+      if (Sym.find(getTagName(TEMPS_LABEL)) != std::string::npos)
+        return TEMPS_LABEL;
+
+      if (Sym.find(getTagName(FRAME_LABEL)) != std::string::npos)
+        return FRAME_LABEL;
+
+      if (Sym.find(getTagName(RET_LABEL)) != std::string::npos)
+        return RET_LABEL;
+
+      if (Sym.find(getTagName(ARGS_LABEL)) != std::string::npos)
+        return ARGS_LABEL;
+
+      if (Sym.find(getTagName(AUTOS_LABEL)) != std::string::npos)
+        return AUTOS_LABEL;
+
+      if (Sym.find(getTagName(LIBCALL)) != std::string::npos)
+        return LIBCALL;
+
+      // It does not have any Tag. So its a true global or static local.
+      if (Sym.find(".") == std::string::npos) 
+        return GLOBAL;
+      
+      // If a . is there, then it may be static local.
+      // We should mangle these as well in clang.
+      if (Sym.find(".") != std::string::npos) 
+        return STATIC_LOCAL;
+ 
+      assert (0 && "Could not determine Symbol's tag");
+      return PREFIX_SYMBOL; // Silence warning when assertions are turned off.
+    }
+
+    // addPrefix - add prefix symbol to a name if there isn't one already.
+    inline static std::string addPrefix (const std::string &Name) {
+      std::string prefix = getTagName (PREFIX_SYMBOL);
+
+      // If this name already has a prefix, nothing to do.
+      if (Name.compare(0, prefix.size(), prefix) == 0)
+        return Name;
+
+      return prefix + Name;
+    }
+
+    // Get mangled func name from a mangled sym name.
+    // In all cases func name is the first component before a '.'.
+    static inline std::string getFuncNameForSym(const std::string &Sym1) {
+      assert (getSymbolTag(Sym1) != GLOBAL && "not belongs to a function");
+
+      std::string Sym = addPrefix(Sym1);
+
+      // Position of the . after func name. That's where func name ends.
+      size_t func_name_end = Sym.find ('.');
+
+      return Sym.substr (0, func_name_end);
+    }
+
+    // Get Frame start label for a func.
+    static std::string getFrameLabel(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(FRAME_LABEL);
+      return Func1 + tag;
+    }
+
+    static std::string getRetvalLabel(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(RET_LABEL);
+      return Func1 + tag;
+    }
+
+    static std::string getArgsLabel(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(ARGS_LABEL);
+      return Func1 + tag;
+    }
+
+    static std::string getTempdataLabel(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(TEMPS_LABEL);
+      return Func1 + tag;
+    }
+
+    static std::string getFrameSectionName(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(FRAME_SECTION);
+      return Func1 + tag + "#";
+    }
+
+    static std::string getAutosSectionName(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(AUTOS_SECTION);
+      return Func1 + tag + "#";
+    }
+
+    static std::string getCodeSectionName(const std::string &Func) {
+      std::string Func1 = addPrefix(Func);
+      std::string tag = getTagName(CODE_SECTION);
+      return Func1 + tag + "#";
+    }
+
+    static std::string getUserSectionName(const std::string &Name) {
+      std::string sname = addPrefix(Name);;
+      std::string tag = getTagName(USER_SECTION);
+      return sname + tag + "#";
+    }
+
+    // udata, romdata and idata section names are generated by a given number.
+    // @udata.<num>.# 
+    static std::string getUdataSectionName(unsigned num, 
+                                           std::string prefix = "") {
+       std::ostringstream o;
+       o << getTagName(PREFIX_SYMBOL) << prefix << "udata." << num 
+         << ".#"; 
+       return o.str(); 
+    }
+
+    static std::string getRomdataSectionName() {
+      return "romdata.#";
+    }
+
+    static std::string getRomdataSectionName(unsigned num,
+                                             std::string prefix = "") {
+       std::ostringstream o;
+       o << getTagName(PREFIX_SYMBOL) << prefix << "romdata." << num 
+         << ".#";
+       return o.str();
+    }
+
+    static std::string getIdataSectionName(unsigned num,
+                                           std::string prefix = "") {
+       std::ostringstream o;
+       o << getTagName(PREFIX_SYMBOL) << prefix << "idata." << num 
+         << ".#"; 
+       return o.str(); 
+    }
+
+    inline static bool isLocalName (const std::string &Name) {
+      if (getSymbolTag(Name) == AUTOS_LABEL)
+        return true;
+
+      return false;
+    }
+
+    inline static bool isMemIntrinsic (const std::string &Name) {
+      if (Name.compare("@memcpy") == 0 || Name.compare("@memset") == 0 ||
+          Name.compare("@memmove") == 0) {
+        return true;
+      }
+      
+      return false;
+    }
+
+    inline static bool isLocalToFunc (std::string &Func, std::string &Var) {
+      if (! isLocalName(Var)) return false;
+
+      std::string Func1 = addPrefix(Func);
+      // Extract func name of the varilable.
+      const std::string &fname = getFuncNameForSym(Var);
+
+      if (fname.compare(Func1) == 0)
+        return true;
+
+      return false;
+    }
+
+
+    // Get the section for the given external symbol names.
+    // This tries to find the type (Tag) of the symbol from its mangled name
+    // and return appropriate section name for it.
+    static inline std::string getSectionNameForSym(const std::string &Sym1) {
+      std::string Sym = addPrefix(Sym1);
+
+      std::string SectionName;
+ 
+      std::string Fname = getFuncNameForSym (Sym);
+      TAGS id = getSymbolTag (Sym);
+
+      switch (id) {
+        default : assert (0 && "Could not determine external symbol type");
+        case FRAME_LABEL:
+        case RET_LABEL:
+        case TEMPS_LABEL:
+        case ARGS_LABEL:  {
+          return getFrameSectionName(Fname);
+        }
+        case AUTOS_LABEL: {
+          return getAutosSectionName(Fname);
+        }
+      }
+    }
+  }; // class PAN.
+} // end namespace llvm;
+
+#endif
diff --git a/lib/Target/PIC16/PIC16Section.cpp b/lib/Target/PIC16/PIC16Section.cpp
new file mode 100644
index 0000000000..7029501e6a
--- /dev/null
+++ b/lib/Target/PIC16/PIC16Section.cpp
@@ -0,0 +1,91 @@
+//===-- PIC16Section.cpp - PIC16 Section ----------- --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PIC16.h"
+#include "PIC16ABINames.h"
+#include "PIC16Section.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+
+// This is the only way to create a PIC16Section. Sections created here
+// do not need to be explicitly deleted as they are managed by auto_ptrs.
+PIC16Section *PIC16Section::Create(const StringRef &Name,
+                                   PIC16SectionType Ty,
+                                   const std::string &Address, 
+                                   int Color, MCContext &Ctx) {
+
+  /// Determine the internal SectionKind info.
+  /// Users of PIC16Section class should not need to know the internal
+  /// SectionKind. They should work only with PIC16SectionType.
+  ///
+  /// PIC16 Terminology for section kinds is as below.
+  /// UDATA - BSS
+  /// IDATA - initialized data (equiv to Metadata) 
+  /// ROMDATA - ReadOnly.
+  /// UDATA_OVR - Sections that can be overlaid. Section of such type is
+  ///             used to contain function autos an frame. We can think of
+  ///             it as equiv to llvm ThreadBSS)
+  /// UDATA_SHR - Shared RAM. Memory area that is mapped to all banks.
+
+  SectionKind K;
+  switch (Ty) {
+    default: llvm_unreachable ("can not create unknown section type");
+    case UDATA_OVR: {
+      K = SectionKind::getThreadBSS();
+      break;
+    }
+    case UDATA_SHR:
+    case UDATA: {
+      K = SectionKind::getBSS();
+      break;
+    }
+    case ROMDATA:
+    case IDATA: {
+      K = SectionKind::getMetadata();
+      break;
+    }
+    case CODE: {
+      K = SectionKind::getText();
+      break;
+    }
+      
+  }
+
+  // Create the Section.
+  PIC16Section *S = new (Ctx) PIC16Section(Name, K, Address, Color);
+  S->T = Ty;
+  return S;
+}
+
+// A generic way to print all types of sections.
+void PIC16Section::PrintSwitchToSection(const MCAsmInfo &MAI,
+                                          raw_ostream &OS) const {
+  // Print name.
+  OS << getName() << '\t';
+
+  // Print type.
+  switch (getType()) {
+  default : llvm_unreachable ("unknown section type"); 
+  case UDATA: OS << "UDATA"; break;
+  case IDATA: OS << "IDATA"; break;
+  case ROMDATA: OS << "ROMDATA"; break;
+  case UDATA_SHR: OS << "UDATA_SHR"; break;
+  case UDATA_OVR: OS << "UDATA_OVR"; break;
+  case CODE: OS << "CODE"; break;
+  }
+
+  OS << '\t';
+
+  // Print Address.
+  OS << Address;
+
+  OS << '\n';
+}
diff --git a/lib/Target/PIC16/PIC16Section.h b/lib/Target/PIC16/PIC16Section.h
new file mode 100644
index 0000000000..693ac3abf9
--- /dev/null
+++ b/lib/Target/PIC16/PIC16Section.h
@@ -0,0 +1,91 @@
+//===- PIC16Section.h - PIC16-specific section representation -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the PIC16Section class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_PIC16SECTION_H
+#define LLVM_PIC16SECTION_H
+
+#include "llvm/MC/MCSection.h"
+#include "llvm/GlobalVariable.h"
+#include <vector>
+
+namespace llvm {
+  /// PIC16Section - Represents a physical section in PIC16 COFF.
+  /// Contains data objects.
+  ///
+  class PIC16Section : public MCSection {
+    /// PIC16 Sections does not really use the SectionKind class to
+    /// to distinguish between various types of sections. PIC16 maintain
+    /// its own Section Type info. See the PIC16SectionType enum in PIC16.h 
+    /// for various section types.
+    PIC16SectionType T;
+
+    /// Name of the section to uniquely identify it.
+    std::string Name;
+
+    /// User can specify an address at which a section should be placed. 
+    /// Negative value here means user hasn't specified any. 
+    std::string Address; 
+
+    /// Overlay information - Sections with same color can be overlaid on
+    /// one another.
+    int Color; 
+
+    /// Total size of all data objects contained here.
+    unsigned Size;
+    
+    PIC16Section(const StringRef &name, SectionKind K, const std::string &addr, 
+                 int color)
+      : MCSection(K), Name(name), Address(addr), Color(color) {
+    }
+    
+  public:
+    /// Return the name of the section.
+    const std::string &getName() const { return Name; }
+
+    /// Return the Address of the section.
+    const std::string &getAddress() const { return Address; }
+
+    /// Return the Color of the section.
+    int getColor() const { return Color; }
+
+    /// Return the size of the section.
+    unsigned getSize() const { return Size; }
+    void setSize(unsigned size) { Size = size; }
+
+    /// Conatined data objects.
+    std::vector<const GlobalVariable *>Items;
+
+    /// Check section type. 
+    bool isUDATA_Type() const { return T == UDATA; }
+    bool isIDATA_Type() const { return T == IDATA; }
+    bool isROMDATA_Type() const { return T == ROMDATA; }
+    bool isUDATA_OVR_Type() const { return T == UDATA_OVR; }
+    bool isUDATA_SHR_Type() const { return T == UDATA_SHR; }
+    bool isCODE_Type() const { return T == CODE; }
+
+    PIC16SectionType getType() const { return T; }
+
+    /// This would be the only way to create a section. 
+    static PIC16Section *Create(const StringRef &Name, PIC16SectionType Ty, 
+                                const std::string &Address, int Color, 
+                                MCContext &Ctx);
+    
+    /// Override this as PIC16 has its own way of printing switching
+    /// to a section.
+    virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
+                                      raw_ostream &OS) const;
+  };
+
+} // end namespace llvm
+
+#endif