From 1d8b8535ec6ccbf07b0e83c5be6aec51feed1d45 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Thu, 18 May 2006 02:10:31 +0000
Subject: [PATCH] Change Module to use TargetData-compatible strings
 internally.

This is part of the on-going work on PR 761.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28379 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Module.h | 11 ++++----
 lib/VMCore/Module.cpp | 61 ++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 65 insertions(+), 7 deletions(-)

diff --git a/include/llvm/Module.h b/include/llvm/Module.h
index 017aaa3fee1..18b081abc76 100644
--- a/include/llvm/Module.h
+++ b/include/llvm/Module.h
@@ -94,8 +94,7 @@ private:
   SymbolTable *SymTab;           ///< Symbol Table for the module
   std::string ModuleID;          ///< Human readable identifier for the module
   std::string TargetTriple;      ///< Platform target triple Module compiled on
-  Endianness  Endian;            ///< Endianness assumed in the module
-  PointerSize PtrSize;           ///< Pointer size assumed in the module
+  std::string DataLayout;        ///< Target data description
 
   friend class Constant;
 
@@ -123,11 +122,11 @@ public:
 
   /// Get the target endian information.
   /// @returns Endianess - an enumeration for the endianess of the target
-  Endianness getEndianness() const { return Endian; }
+  Endianness getEndianness() const;
 
   /// Get the target pointer size.
   /// @returns PointerSize - an enumeration for the size of the target's pointer
-  PointerSize getPointerSize() const { return PtrSize; }
+  PointerSize getPointerSize() const;
 
   /// Get any module-scope inline assembly blocks.
   /// @returns a string containing the module-scope inline assembly blocks.
@@ -144,10 +143,10 @@ public:
   void setTargetTriple(const std::string &T) { TargetTriple = T; }
 
   /// Set the target endian information.
-  void setEndianness(Endianness E) { Endian = E; }
+  void setEndianness(Endianness E);
 
   /// Set the target pointer size.
-  void setPointerSize(PointerSize PS) { PtrSize = PS; }
+  void setPointerSize(PointerSize PS);
 
   /// Set the module-scope inline assembly blocks.
   void setModuleInlineAsm(const std::string &Asm) { GlobalScopeAsm = Asm; }
diff --git a/lib/VMCore/Module.cpp b/lib/VMCore/Module.cpp
index 7c400aa515d..9fdc13ddb69 100644
--- a/lib/VMCore/Module.cpp
+++ b/lib/VMCore/Module.cpp
@@ -16,10 +16,12 @@
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/LeakDetector.h"
 #include "SymbolTableListTraitsImpl.h"
 #include <algorithm>
 #include <cstdarg>
+#include <cstdlib>
 #include <iostream>
 #include <map>
 using namespace llvm;
@@ -61,7 +63,7 @@ template class SymbolTableListTraits<Function, Module, Module>;
 //
 
 Module::Module(const std::string &MID)
-  : ModuleID(MID), Endian(AnyEndianness), PtrSize(AnyPointerSize) {
+  : ModuleID(MID), DataLayout("") {
   FunctionList.setItemParent(this);
   FunctionList.setParent(this);
   GlobalList.setItemParent(this);
@@ -84,6 +86,63 @@ void Module::dump() const {
   print(std::cerr);
 }
 
+/// Target endian information...
+Module::Endianness Module::getEndianness() const {
+  std::string temp = DataLayout;
+  
+  while (temp.length() > 0) {
+    std::string token = getToken(temp, "-");
+    
+    if (token[0] == 'e') {
+      return LittleEndian;
+    } else if (token[0] == 'E') {
+      return BigEndian;
+    }
+  }
+  
+  return AnyEndianness;
+}
+
+void Module::setEndianness(Endianness E) {
+  if (DataLayout.compare("") != 0 && E != AnyEndianness)
+    DataLayout.insert(0, "-");
+  
+  if (E == LittleEndian)
+    DataLayout.insert(0, "e");
+  else if (E == BigEndian)
+    DataLayout.insert(0, "E");
+}
+
+/// Target Pointer Size information...
+Module::PointerSize Module::getPointerSize() const {
+  std::string temp = DataLayout;
+  
+  while (temp.length() > 0) {
+    std::string token = getToken(temp, "-");
+    char signal = getToken(token, ":")[0];
+    
+    if (signal == 'p') {
+      int size = atoi(getToken(token, ":").c_str());
+      if (size == 32)
+        return Pointer32;
+      else if (size == 64)
+        return Pointer64;
+    }
+  }
+  
+  return AnyPointerSize;
+}
+
+void Module::setPointerSize(PointerSize PS) {
+  if (DataLayout.compare("") != 0 && PS != AnyPointerSize)
+    DataLayout.insert(0, "-");
+  
+  if (PS == Pointer32)
+    DataLayout.insert(0, "p:32:32");
+  else if (PS == Pointer64)
+    DataLayout.insert(0, "p:64:64");
+}
+
 //===----------------------------------------------------------------------===//
 // Methods for easy access to the functions in the module.
 //