Partial revert of 132882.

[oota-llvm.git] / lib / CodeGen / AsmPrinter / AsmPrinter.cpp

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 4cd7cc969b1b553e9c5fd112af9b4d2bc2d20d18..161afbafb57b179ab89ec9155a8846465b33d5ba 100644 (file)
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -199,6 +199,9 @@ bool AsmPrinter::doInitialization(Module &M) {
   case ExceptionHandling::ARM:
     DE = new ARMException(this);
     return false;
+  case ExceptionHandling::Win64:
+    DE = new Win64Exception(this);
+    return false;
   }
 
   llvm_unreachable("Unknown exception type.");
@@ -266,7 +269,7 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
   }
 
   MCSymbol *GVSym = Mang->getSymbol(GV);
-  EmitVisibility(GVSym, GV->getVisibility());
+  EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration());
 
   if (!GV->hasInitializer())   // External globals require no extra code.
     return;
@@ -601,6 +604,11 @@ AsmPrinter::CFIMoveType AsmPrinter::needsCFIMoves() {
   return CFI_M_None;
 }
 
+bool AsmPrinter::needsSEHMoves() {
+  return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 &&
+    MF->getFunction()->needsUnwindTableEntry();
+}
+
 void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
   MCSymbol *Label = MI.getOperand(0).getMCSymbol();
 
@@ -763,7 +771,22 @@ getDebugValueLocation(const MachineInstr *MI) const {
 /// EmitDwarfRegOp - Emit dwarf register operation.
 void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
   const TargetRegisterInfo *TRI = TM.getRegisterInfo();
-  unsigned Reg = TRI->getDwarfRegNum(MLoc.getReg(), false);
+  int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false);
+
+  for (const unsigned *SR = TRI->getSuperRegisters(MLoc.getReg());
+       *SR && Reg < 0; ++SR) {
+    Reg = TRI->getDwarfRegNum(*SR, false);
+    // FIXME: Get the bit range this register uses of the superregister
+    // so that we can produce a DW_OP_bit_piece
+  }
+
+  // FIXME: Handle cases like a super register being encoded as
+  // DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33
+
+  // FIXME: We have no reasonable way of handling errors in here. The
+  // caller might be in the middle of an dwarf expression. We should
+  // probably assert that Reg >= 0 once debug info generation is more mature.
+
   if (int Offset =  MLoc.getOffset()) {
     if (Reg < 32) {
       OutStreamer.AddComment(
@@ -788,6 +811,8 @@ void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
       EmitULEB128(Reg);
     }
   }
+
+  // FIXME: Produce a DW_OP_bit_piece if we used a superregister
 }
 
 bool AsmPrinter::doFinalization(Module &M) {