Revert r79563

llvm-svn: 79691

llvm/lib/Target/PIC16/PIC16Passes/Makefile

-##===- lib/Target/PIC16/Makefile ---------------------------*- Makefile -*-===##
-# 
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source 
-# License. See LICENSE.TXT for details.
-# 
-##===----------------------------------------------------------------------===##
-LEVEL = ../../../..
-LIBRARYNAME = PIC16Passes
-TARGET = PIC16
-
-LOADABLE_MODULE = 1
-
-include $(LEVEL)/Makefile.common
-

llvm/lib/Target/PIC16/PIC16Passes/PIC16CallGraph.cpp

-#include "llvm/Analysis/CallGraph.h"
-#include "llvm/Pass.h"
-#include "llvm/Module.h"
-#include "llvm/Transforms/Utils/Cloning.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/raw_ostream.h"
-#include <vector>
-using namespace llvm;
-using std::vector;
-using std::string;
-
-namespace {
-  class PIC16CallGraph : public ModulePass { 
-  public:
-    static char ID; // Class identification 
-    PIC16CallGraph() : ModulePass(&ID)  {}
-
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.setPreservesAll();
-      AU.addRequired<CallGraph>();
-    }
-    virtual bool runOnModule(Module &M) {
-      // Initially record that no interrupt has been found
-      InterruptFound = false;
-
-      CallGraph &CG = getAnalysis<CallGraph>();
-      for (CallGraph::iterator it = CG.begin() ; it != CG.end(); it++)
-      {
-        // External calling node doesn't have any function associated 
-        // with it
-        if (!it->first)
-          continue;
-
-        if (it->first->getName().str() == "main") {
-          // See if the main itself is interrupt function then report an error.
-          if (it->first->getSection().find("interrupt") != string::npos)
-             reportError("Function 'main' can't be interrupt function");
-          else  { 
-            // Set the MainLine tag for function main also. 
-            it->second->getFunction()->setSection("ML");
-            // mark the hierarchy 
-            markFunctionHierarchy(it->second, "ML");
-          }
-        } else if (it->first->getSection().find("interrupt") != string::npos) {
-          if (InterruptFound)
-            reportError("More than one interrupt functions defined in the module"); 
-
-          InterruptFound = true;
-          markFunctionHierarchy(it->second, "IL");
-        }
-      }
-     return false;
-    }
-  private: // Functions
-    // Makr function hierarchy for the MainLine or InterruptLine.
-    void markFunctionHierarchy(CallGraphNode *CGN, string StringMark);
-
-    // Error reporting for PIC16Pass
-    void reportError(string ErrorString, vector<string> &Values);
-    void reportError(string ErrorString);
-  private: // Data
-    // Records if the interrupt function has already been found.
-    // If more than one interrupt function is found then an error
-    // should be thrown.
-    bool InterruptFound; 
-  };
-  char PIC16CallGraph::ID =0;
-  static RegisterPass<PIC16CallGraph>
-  Y("pic16cg", "PIC16 CallGraph Construction");
-
-}  // End of anonymous namespace
-
-void PIC16CallGraph::reportError(string ErrorString) {
-  errs() << "ERROR : " << ErrorString << "\n";
-  exit(1);
-}
-
-void PIC16CallGraph::
-reportError (string ErrorString, vector<string> &Values) {
-  unsigned ValCount = Values.size();
-  string TargetString;
-  for (unsigned i=0; i<ValCount; ++i) {
-    TargetString = "%";
-    TargetString += ((char)i + '0');
-    ErrorString.replace(ErrorString.find(TargetString), TargetString.length(), Values[i]);
-  }
-  errs() << "ERROR : " << ErrorString << "\n";
-  exit(1);
-  //llvm_report_error(ErrorString);
-}
-
-void PIC16CallGraph::
-markFunctionHierarchy(CallGraphNode *CGN, string StringMark) {
-  string AlternateMark;
-  string SharedMark = "SL";
-  if (StringMark == "ML")
-    AlternateMark = "IL";
-  else
-    AlternateMark = "ML";
-
-  // Mark all the called functions
-  for(CallGraphNode::iterator cgn_it = CGN->begin(); 
-              cgn_it != CGN->end(); ++cgn_it) {
-     Function *CalledF = cgn_it->second->getFunction();
-
-     // If calling an external function then CallGraphNode
-     // will not be associated with any function.
-     if (!CalledF)
-       continue;
-
-     // Issue diagnostic if interrupt function is being called.
-     if (CalledF->getSection().find("interrupt") != string::npos) {
-       vector<string> Values;
-       Values.push_back(CalledF->getName().str());
-       reportError("Interrupt function (%0) can't be called", Values); 
-     }
-
-     // If already shared mark then no need to check any further.
-     // Also a great potential for recursion.
-     if (CalledF->getSection().find(SharedMark) != string::npos) {
-       continue;
-     }
-
-     // Has already been mark 
-     if (CalledF->getSection().find(StringMark) != string::npos) {
-       // Issue diagnostic
-       // Potential for recursion.
-     } else {
-       // Mark now
-       if (CalledF->getSection().find(AlternateMark) != string::npos) {
-         // Function is alternatively marked. It should be a shared one.
-        
-         // Shared functions should be clone. Clone here. 
-         Function *ClonedFunc = CloneFunction(CalledF); 
-
-         // Add the newly created function to the module.
-         CalledF->getParent()->getFunctionList().push_back(ClonedFunc);
-
-         // The new function should be for interrupt line. Therefore should have the
-         // name suffixed with IL and section attribute marked with IL. 
-         ClonedFunc->setName(CalledF->getName().str() + ".IL");
-         ClonedFunc->setSection("IL");
-
-         // Original function now should be for MainLine only. 
-         CalledF->setSection("ML");
-
-         // Update the CallSite 
-         CallSite CS = cgn_it->first;
-         CS.getInstruction()->getOperand(0)->setName(CalledF->getName().str() + ".shared");
-       } else {
-         // Function is not marked. It should be marked now.
-         CalledF->setSection(StringMark);
-       }
-     }
-     
-     // Before going any further mark all the called function by current
-     // function.
-     markFunctionHierarchy(cgn_it->second ,StringMark);
-  } // end of loop of all called functions.
-
-}