1 files changed, 264 insertions, 0 deletions
diff --git a/lib/Target/PIC16/PIC16TargetAsmInfo.cpp b/lib/Target/PIC16/PIC16TargetAsmInfo.cpp
new file mode 100644
index 0000000..d2657f0
--- /dev/null
+++ b/lib/Target/PIC16/PIC16TargetAsmInfo.cpp
@@ -0,0 +1,264 @@
+//===-- PIC16TargetAsmInfo.cpp - PIC16 asm properties ---------------------===//
+//
+//                     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 declarations of the PIC16TargetAsmInfo properties.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PIC16TargetAsmInfo.h"
+#include "PIC16TargetMachine.h"
+#include "llvm/GlobalValue.h"
+#include "llvm/GlobalVariable.h"
+#include "llvm/DerivedTypes.h"
+
+using namespace llvm;
+
+PIC16TargetAsmInfo::
+PIC16TargetAsmInfo(const PIC16TargetMachine &TM) 
+  : TargetAsmInfo(TM) {
+  CommentString = ";";
+  GlobalPrefix = PAN::getTagName(PAN::PREFIX_SYMBOL);
+  GlobalDirective = "\tglobal\t";
+  ExternDirective = "\textern\t";
+
+  Data8bitsDirective = " db ";
+  Data16bitsDirective = " dw ";
+  Data32bitsDirective = " dl ";
+  RomData8bitsDirective = " dw ";
+  RomData16bitsDirective = " rom_di ";
+  RomData32bitsDirective = " rom_dl ";
+  ZeroDirective = NULL;
+  AsciiDirective = " dt ";
+  AscizDirective = NULL;
+  BSSSection_  = getNamedSection("udata.# UDATA",
+                              SectionFlags::Writeable | SectionFlags::BSS);
+  ReadOnlySection = getNamedSection("romdata.# ROMDATA", SectionFlags::None);
+  DataSection = getNamedSection("idata.# IDATA", SectionFlags::Writeable);
+  SwitchToSectionDirective = "";
+  // Need because otherwise a .text symbol is emitted by DwarfWriter
+  // in BeginModule, and gpasm cribbs for that .text symbol.
+  TextSection = getUnnamedSection("", SectionFlags::Code);
+  ROSection = new PIC16Section(getReadOnlySection());
+  ExternalVarDecls = new PIC16Section(getNamedSection("ExternalVarDecls"));
+  ExternalVarDefs = new PIC16Section(getNamedSection("ExternalVarDefs"));
+  // Set it to false because we weed to generate c file name and not bc file
+  // name.
+  HasSingleParameterDotFile = false;
+}
+
+const char *PIC16TargetAsmInfo::getRomDirective(unsigned size) const
+{
+  if (size == 8)
+    return RomData8bitsDirective;
+  else if (size == 16)
+    return RomData16bitsDirective;
+  else if (size == 32)
+    return RomData32bitsDirective;
+  else
+    return NULL;
+}
+
+
+const char *PIC16TargetAsmInfo::getASDirective(unsigned size, 
+                                               unsigned AS) const {
+  if (AS == PIC16ISD::ROM_SPACE)
+    return getRomDirective(size);
+  else
+    return NULL;
+}
+
+const Section *
+PIC16TargetAsmInfo::getBSSSectionForGlobal(const GlobalVariable *GV) const {
+  assert (GV->hasInitializer() && "This global doesn't need space");
+  Constant *C = GV->getInitializer();
+  assert (C->isNullValue() && "Unitialized globals has non-zero initializer");
+
+  // Find how much space this global needs.
+  const TargetData *TD = TM.getTargetData();
+  const Type *Ty = C->getType(); 
+  unsigned ValSize = TD->getTypeAllocSize(Ty);
+ 
+  // Go through all BSS Sections and assign this variable
+  // to the first available section having enough space.
+  PIC16Section *FoundBSS = NULL;
+  for (unsigned i = 0; i < BSSSections.size(); i++) {
+    if (DataBankSize - BSSSections[i]->Size >= ValSize) {
+      FoundBSS = BSSSections[i];
+      break;
+    }
+  }
+
+  // No BSS section spacious enough was found. Crate a new one.
+  if (! FoundBSS) {
+    std::string name = PAN::getUdataSectionName(BSSSections.size());
+    const Section *NewSection = getNamedSection (name.c_str());
+
+    FoundBSS = new PIC16Section(NewSection);
+
+    // Add this newly created BSS section to the list of BSSSections.
+    BSSSections.push_back(FoundBSS);
+  }
+  
+  // Insert the GV into this BSS.
+  FoundBSS->Items.push_back(GV);
+  FoundBSS->Size += ValSize;
+
+  // We can't do this here because GV is const .
+  // const std::string SName = FoundBSS->S_->getName();
+  // GV->setSection(SName);
+
+  return FoundBSS->S_;
+} 
+
+const Section *
+PIC16TargetAsmInfo::getIDATASectionForGlobal(const GlobalVariable *GV) const {
+  assert (GV->hasInitializer() && "This global doesn't need space");
+  Constant *C = GV->getInitializer();
+  assert (!C->isNullValue() && "initialized globals has zero initializer");
+  assert (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE &&
+          "can split initialized RAM data only");
+
+  // Find how much space this global needs.
+  const TargetData *TD = TM.getTargetData();
+  const Type *Ty = C->getType(); 
+  unsigned ValSize = TD->getTypeAllocSize(Ty);
+ 
+  // Go through all IDATA Sections and assign this variable
+  // to the first available section having enough space.
+  PIC16Section *FoundIDATA = NULL;
+  for (unsigned i = 0; i < IDATASections.size(); i++) {
+    if ( DataBankSize - IDATASections[i]->Size >= ValSize) {
+      FoundIDATA = IDATASections[i]; 
+      break;
+    }
+  }
+
+  // No IDATA section spacious enough was found. Crate a new one.
+  if (! FoundIDATA) {
+    std::string name = PAN::getIdataSectionName(IDATASections.size());
+    const Section *NewSection = getNamedSection (name.c_str());
+
+    FoundIDATA = new PIC16Section(NewSection);
+
+    // Add this newly created IDATA section to the list of IDATASections.
+    IDATASections.push_back(FoundIDATA);
+  }
+  
+  // Insert the GV into this IDATA.
+  FoundIDATA->Items.push_back(GV);
+  FoundIDATA->Size += ValSize;
+
+  // We can't do this here because GV is const .
+  // GV->setSection(FoundIDATA->S->getName());
+
+  return FoundIDATA->S_;
+} 
+
+// Get the section for an automatic variable of a function.
+// For PIC16 they are globals only with mangled names.
+const Section *
+PIC16TargetAsmInfo::getSectionForAuto(const GlobalVariable *GV) const {
+
+  const std::string name = PAN::getSectionNameForSym(GV->getName());
+
+  // Go through all Auto Sections and assign this variable
+  // to the appropriate section.
+  PIC16Section *FoundAutoSec = NULL;
+  for (unsigned i = 0; i < AutosSections.size(); i++) {
+    if ( AutosSections[i]->S_->getName() == name) {
+      FoundAutoSec = AutosSections[i];
+      break;
+    }
+  }
+
+  // No Auto section was found. Crate a new one.
+  if (! FoundAutoSec) {
+    const Section *NewSection = getNamedSection (name.c_str());
+
+    FoundAutoSec = new PIC16Section(NewSection);
+
+    // Add this newly created autos section to the list of AutosSections.
+    AutosSections.push_back(FoundAutoSec);
+  }
+
+  // Insert the auto into this section.
+  FoundAutoSec->Items.push_back(GV);
+
+  return FoundAutoSec->S_;
+}
+
+
+// Override default implementation to put the true globals into
+// multiple data sections if required.
+const Section*
+PIC16TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV1) const {
+  // We select the section based on the initializer here, so it really
+  // has to be a GlobalVariable.
+  const GlobalVariable *GV = dyn_cast<GlobalVariable>(GV1); 
+
+  if (!GV)
+    return TargetAsmInfo::SelectSectionForGlobal(GV1);
+
+  // Record Exteranl Var Decls.
+  if (GV->isDeclaration()) {
+    ExternalVarDecls->Items.push_back(GV);
+    return ExternalVarDecls->S_;
+  }
+    
+  assert (GV->hasInitializer() && "A def without initializer?");
+
+  // First, if this is an automatic variable for a function, get the section
+  // name for it and return.
+  const std::string name = GV->getName();
+  if (PAN::isLocalName(name)) {
+    return getSectionForAuto(GV);
+  }
+
+  // Record Exteranl Var Defs.
+  if (GV->hasExternalLinkage() || GV->hasCommonLinkage()) {
+    ExternalVarDefs->Items.push_back(GV);
+  }
+
+  // See if this is an uninitialized global.
+  const Constant *C = GV->getInitializer();
+  if (C->isNullValue()) 
+    return getBSSSectionForGlobal(GV); 
+
+  // If this is initialized data in RAM. Put it in the correct IDATA section.
+  if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE) 
+    return getIDATASectionForGlobal(GV);
+
+  // This is initialized data in rom, put it in the readonly section.
+  if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE) {
+    ROSection->Items.push_back(GV);
+    return ROSection->S_;
+  }
+
+  // Else let the default implementation take care of it.
+  return TargetAsmInfo::SelectSectionForGlobal(GV);
+}
+
+PIC16TargetAsmInfo::~PIC16TargetAsmInfo() {
+  
+  for (unsigned i = 0; i < BSSSections.size(); i++) {
+      delete BSSSections[i]; 
+  }
+
+  for (unsigned i = 0; i < IDATASections.size(); i++) {
+      delete IDATASections[i]; 
+  }
+
+  for (unsigned i = 0; i < AutosSections.size(); i++) {
+      delete AutosSections[i]; 
+  }
+
+  delete ROSection;
+  delete ExternalVarDecls;
+  delete ExternalVarDefs;
+}