Start using SwitchSection, allowing globals and functions to be emitted

to specific sections.  Delete some dead functions copied from the X86 backend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24449 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/IA64/IA64AsmPrinter.cpp

@@ -46,33 +46,6 @@ namespace {
   };
 }
 
-static bool isScale(const MachineOperand &MO) {
-  return MO.isImmediate() &&
-    (MO.getImmedValue() == 1 || MO.getImmedValue() == 2 ||
-     MO.getImmedValue() == 4 || MO.getImmedValue() == 8);
-}
-
-static bool isMem(const MachineInstr *MI, unsigned Op) {
-  if (MI->getOperand(Op).isFrameIndex()) return true;
-  if (MI->getOperand(Op).isConstantPoolIndex()) return true;
-  return Op+4 <= MI->getNumOperands() &&
-    MI->getOperand(Op  ).isRegister() && isScale(MI->getOperand(Op+1)) &&
-    MI->getOperand(Op+2).isRegister() && (MI->getOperand(Op+3).isImmediate() ||
-        MI->getOperand(Op+3).isGlobalAddress());
-}
-
-// switchSection - Switch to the specified section of the executable if we are
-// not already in it!
-//
-static void switchSection(std::ostream &OS, std::string &CurSection,
-                          const char *NewSection) {
-  if (CurSection != NewSection) {
-    CurSection = NewSection;
-    if (!CurSection.empty())
-      OS << "\t" << NewSection << "\n";
-  }
-}
-
 /// printConstantPool - Print to the current output stream assembly
 /// representations of the constants in the constant pool MCP. This is
 /// used to print out constants which have been "spilled to memory" by
@@ -84,8 +57,8 @@ void IA64SharedAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
 
   if (CP.empty()) return;
 
-  O << "\n\t.section .data, \"aw\", \"progbits\"\n";
+  // FIXME: would be nice to have rodata (no 'w') when appropriate?
-      // FIXME: would be nice to have rodata (no 'w') when appropriate?
+  SwitchSection("\n\t.section .data, \"aw\", \"progbits\"\n", 0);
   for (unsigned i = 0, e = CP.size(); i != e; ++i) {
     emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
     O << PrivateGlobalPrefix << "CPI" << CurrentFnName << "_" << i
@@ -96,7 +69,6 @@ void IA64SharedAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
 
 bool IA64SharedAsmPrinter::doFinalization(Module &M) {
   const TargetData &TD = TM.getTargetData();
-  std::string CurSection;
 
   // Print out module-level global variables here.
   for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
@@ -111,7 +83,7 @@ bool IA64SharedAsmPrinter::doFinalization(Module &M) {
       if (C->isNullValue() &&
           (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
            I->hasWeakLinkage() /* FIXME: Verify correct */)) {
-        switchSection(O, CurSection, ".data");
+        SwitchSection(".data", I);
         if (I->hasInternalLinkage()) {
           O << "\t.lcomm " << name << "," << TD.getTypeSize(C->getType())
             << "," << (1 << Align);
@@ -129,9 +101,9 @@ bool IA64SharedAsmPrinter::doFinalization(Module &M) {
         case GlobalValue::WeakLinkage:   // FIXME: Verify correct for weak.
           // Nonnull linkonce -> weak
           O << "\t.weak " << name << "\n";
-          switchSection(O, CurSection, "");
           O << "\t.section\t.llvm.linkonce.d." << name
             << ", \"aw\", \"progbits\"\n";
+          SwitchSection("", I);
           break;
         case GlobalValue::AppendingLinkage:
           // FIXME: appending linkage variables should go into a section of
@@ -141,10 +113,7 @@ bool IA64SharedAsmPrinter::doFinalization(Module &M) {
           O << "\t.global " << name << "\n";
           // FALL THROUGH
         case GlobalValue::InternalLinkage:
-          if (C->isNullValue())
+          SwitchSection(C->isNullValue() ? ".bss" : ".data", I);
-            switchSection(O, CurSection, ".bss");
-          else
-            switchSection(O, CurSection, ".data");
           break;
         case GlobalValue::GhostLinkage:
           std::cerr << "GhostLinkage cannot appear in IA64AsmPrinter!\n";
@@ -298,8 +267,8 @@ bool IA64AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
   printConstantPool(MF.getConstantPool());
 
   // Print out labels for the function.
-  O << "\n\t.section .text, \"ax\", \"progbits\"\n";
+  SwitchSection("\n\t.section .text, \"ax\", \"progbits\"\n", MF.getFunction());
-              // ^^  means "Allocated instruXions in mem, initialized"
+  // ^^  means "Allocated instruXions in mem, initialized"
   emitAlignment(5);
   O << "\t.global\t" << CurrentFnName << "\n";
   O << "\t.type\t" << CurrentFnName << ", @function\n";
@@ -413,7 +382,6 @@ void IA64AsmPrinter::printOp(const MachineOperand &MO,
 /// MI to the current output stream.
 ///
 void IA64AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
-
   ++EmittedInsts;
 
   // Call the autogenerated instruction printer routines.