From 3fc7e532aa18b6ee8958c53bc053b781f83f5833 Mon Sep 17 00:00:00 2001
From: Sanjiv Gupta <sanjiv.gupta@microchip.com>
Date: Wed, 3 Jun 2009 16:27:49 +0000
Subject: [PATCH] Emit file directives correctly in case of a .bc is generated
 by llvm-ld after linking in several .bc files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72781 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PIC16/PIC16AsmPrinter.cpp | 12 ++++--------
 lib/Target/PIC16/PIC16DebugInfo.cpp  | 26 ++++++++++++++++++++++++--
 lib/Target/PIC16/PIC16DebugInfo.h    |  7 ++++++-
 3 files changed, 34 insertions(+), 11 deletions(-)

diff --git a/lib/Target/PIC16/PIC16AsmPrinter.cpp b/lib/Target/PIC16/PIC16AsmPrinter.cpp
index ef3bc4b52a9..b42ee4524be 100644
--- a/lib/Target/PIC16/PIC16AsmPrinter.cpp
+++ b/lib/Target/PIC16/PIC16AsmPrinter.cpp
@@ -47,6 +47,7 @@ bool PIC16AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
   const Function *F = MF.getFunction();
   CurrentFnName = Mang->getValueName(F);
 
+  DbgInfo.EmitFileDirective(F);
   // Emit the function variables.
   EmitFunctionFrame(MF);
 
@@ -181,17 +182,11 @@ void PIC16AsmPrinter::printLibcallDecls(void) {
 
 bool PIC16AsmPrinter::doInitialization (Module &M) {
   bool Result = AsmPrinter::doInitialization(M);
-  DbgInfo.EmitFileDirective(M);
 
   // FIXME:: This is temporary solution to generate the include file.
   // The processor should be passed to llc as in input and the header file
   // should be generated accordingly.
   O << "\n\t#include P16F1937.INC\n";
-  MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  assert(MMI);
-  DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
-  assert(DW && "Dwarf Writer is not available");
-  DW->BeginModule(&M, MMI, O, this, TAI);
 
   // Set the section names for all globals.
   for (Module::global_iterator I = M.global_begin(), E = M.global_end();
@@ -199,13 +194,14 @@ bool PIC16AsmPrinter::doInitialization (Module &M) {
     I->setSection(TAI->SectionForGlobal(I)->getName());
   }
 
+  DbgInfo.EmitFileDirective(M);
   EmitFunctionDecls(M);
   EmitUndefinedVars(M);
   EmitDefinedVars(M);
   EmitIData(M);
   EmitUData(M);
   EmitRomData(M);
-  DbgInfo.PopulateFunctsDI(M); 
+  DbgInfo.PopulateFunctsDI(M);
   return Result;
 }
 
@@ -285,7 +281,7 @@ void PIC16AsmPrinter::EmitRomData (Module &M)
 bool PIC16AsmPrinter::doFinalization(Module &M) {
   printLibcallDecls();
   DbgInfo.EmitVarDebugInfo(M);
-  O << "\n\t" << ".EOF";
+  DbgInfo.EmitEOF();
   O << "\n\t" << "END\n";
   bool Result = AsmPrinter::doFinalization(M);
   return Result;
diff --git a/lib/Target/PIC16/PIC16DebugInfo.cpp b/lib/Target/PIC16/PIC16DebugInfo.cpp
index 4d43811f24a..faf4590b43e 100644
--- a/lib/Target/PIC16/PIC16DebugInfo.cpp
+++ b/lib/Target/PIC16/PIC16DebugInfo.cpp
@@ -264,7 +264,29 @@ void PIC16DbgInfo::EmitFileDirective(Module &M) {
   if (CU) {
     DICompileUnit DIUnit(CU);
     std::string Dir, FN;
-    O << "\n\t.file\t\"" << DIUnit.getDirectory(Dir) <<"/"
-      << DIUnit.getFilename(FN) << "\"" ;
+    std::string File = DIUnit.getDirectory(Dir) + "/" + DIUnit.getFilename(FN);
+    O << "\n\t.file\t\"" << File << "\"\n" ;
+    CurFile = File;
   }
 }
+
+void PIC16DbgInfo::EmitFileDirective(const Function *F) {
+  std::string FunctName = F->getName();
+  DISubprogram *SP = getFunctDI(FunctName);
+  if (SP) {
+    std::string Dir, FN;
+    DICompileUnit CU = SP->getCompileUnit();
+    std::string File = CU.getDirectory(Dir) + "/" + CU.getFilename(FN);
+    if ( File != CurFile) {
+      EmitEOF();
+      O << "\n\t.file\t\"" << File << "\"\n" ;
+      CurFile = File;
+    }
+  }
+}
+
+void PIC16DbgInfo::EmitEOF() {
+  if (CurFile != "")
+    O << "\n\t.EOF";
+}
+
diff --git a/lib/Target/PIC16/PIC16DebugInfo.h b/lib/Target/PIC16/PIC16DebugInfo.h
index 96b23da403c..be3939336b2 100644
--- a/lib/Target/PIC16/PIC16DebugInfo.h
+++ b/lib/Target/PIC16/PIC16DebugInfo.h
@@ -94,8 +94,11 @@ namespace llvm {
     std::map <std::string, DISubprogram *> FunctNameMap;
     raw_ostream &O;
     const TargetAsmInfo *TAI;
+    std::string CurFile;
   public:
-     PIC16DbgInfo(raw_ostream &o, const TargetAsmInfo *T) : O(o), TAI(T) {}
+    PIC16DbgInfo(raw_ostream &o, const TargetAsmInfo *T) : O(o), TAI(T) {
+      CurFile = "";  
+    }
     ~PIC16DbgInfo();
     void PopulateDebugInfo(DIType Ty, unsigned short &TypeNo, bool &HasAux,
                            int Aux[], std::string &TypeName);
@@ -109,6 +112,8 @@ namespace llvm {
     inline void EmitSymbol(std::string Name, int Class);
     void EmitVarDebugInfo(Module &M);
     void EmitFileDirective(Module &M);
+    void EmitFileDirective(const Function *F);
+    void EmitEOF();
   };
 } // end namespace llvm;
 #endif