Adding support for placing global objects in shared data memory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85006 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 1 deletions

diff --git a/lib/Target/PIC16/PIC16TargetObjectFile.cpp b/lib/Target/PIC16/PIC16TargetObjectFile.cpp
index 7eedf7fe23..846715de6f 100644
--- a/lib/Target/PIC16/PIC16TargetObjectFile.cpp
+++ b/lib/Target/PIC16/PIC16TargetObjectFile.cpp
@@ -72,6 +72,7 @@ getPIC16DataSection(const std::string &Name, PIC16SectionType Ty,
   case UDATA: UDATASections_.push_back(Entry); break;
   case IDATA: IDATASections_.push_back(Entry); break;
   case ROMDATA: ROMDATASection_ = Entry; break;
+  case UDATA_SHR: SHAREDUDATASection_ = Entry; break;
   }
 
   return Entry;
@@ -279,7 +280,10 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
     std::string AddrStr = "Address=";
     if (SectName.compare(0, AddrStr.length(), AddrStr) == 0) {
       std::string SectAddr = SectName.substr(AddrStr.length());
-      return allocateAtGivenAddress(GVar, SectAddr);
+      if (SectAddr.compare("NEAR") == 0)
+        return allocateSHARED(GVar, Mang);
+      else
+        return allocateAtGivenAddress(GVar, SectAddr);
     }
      
     // Create the section specified with section attribute. 
@@ -289,6 +293,25 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
   return getPIC16DataSection(GV->getSection().c_str(), UDATA);
 }
 
+const MCSection *
+PIC16TargetObjectFile::allocateSHARED(const GlobalVariable *GV,
+                                      Mangler *Mang) const {
+  // Make sure that this is an uninitialized global.
+  assert(GV->hasInitializer() && "This global doesn't need space");
+  if (!GV->getInitializer()->isNullValue()) {
+    // FIXME: Generate a warning in this case that near qualifier will be 
+    // ignored.
+    return SelectSectionForGlobal(GV, SectionKind::getDataRel(), Mang, *TM); 
+  } 
+  std::string Name = PAN::getSharedUDataSectionName(); 
+
+  PIC16Section *SharedUDataSect = getPIC16DataSection(Name.c_str(), UDATA_SHR); 
+  // Insert the GV into shared section.
+  SharedUDataSect->Items.push_back(GV);
+  return SharedUDataSect;
+}
+
+
 // Interface used by AsmPrinter to get a code section for a function.
 const PIC16Section *
 PIC16TargetObjectFile::SectionForCode(const std::string &FnName) const {