Produce .weak_def_can_be_hidden for some linkonce_odr values

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

diff --git a/lib/CodeGen/AsmPrinter/ARMException.cpp b/lib/CodeGen/AsmPrinter/ARMException.cpp
index e5a7d05f4c598a72cde1aeaebb5281120c9f8c11..5d82dd9e9a7e8b14e68baa2f88857ad9ce4a0307 100644 (file)
--- a/lib/CodeGen/AsmPrinter/ARMException.cpp
+++ b/lib/CodeGen/AsmPrinter/ARMException.cpp
@@ -12,57 +12,53 @@
 //===----------------------------------------------------------------------===//
 
 #include "DwarfException.h"
-#include "llvm/Module.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Twine.h"
 #include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Module.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/FormattedStream.h"
 #include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetFrameLowering.h"
-#include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/Twine.h"
 using namespace llvm;
 
-cl::opt<ExceptionHandling::ARMEHABIMode>
-EnableARMEHABI("arm-enable-ehabi", cl::Hidden,
-    cl::desc("Generate ARM EHABI tables:"),
-    cl::values(clEnumValN(ExceptionHandling::ARMEHABIDisabled, "no",
-            "Do not generate ARM EHABI tables"),
-        clEnumValN(ExceptionHandling::ARMEHABIUnwind, "unwind",
-            "Emit unwinding instructions, but not descriptors"),
-        clEnumValN(ExceptionHandling::ARMEHABIFull, "full",
-            "Generate full ARM EHABI tables"),
-        clEnumValEnd));
+static cl::opt<bool>
+EnableARMEHABIDescriptors("arm-enable-ehabi-descriptors", cl::Hidden,
+  cl::desc("Generate ARM EHABI tables with unwinding descriptors"),
+  cl::init(false));
 
 
 ARMException::ARMException(AsmPrinter *A)
-  : DwarfException(A),
-    shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
-    {}
+  : DwarfException(A) {}
 
 ARMException::~ARMException() {}
 
+ARMTargetStreamer &ARMException::getTargetStreamer() {
+  MCTargetStreamer &TS = Asm->OutStreamer.getTargetStreamer();
+  return static_cast<ARMTargetStreamer &>(TS);
+}
+
 void ARMException::EndModule() {
 }
 
 /// BeginFunction - Gather pre-function exception information. Assumes it's
 /// being emitted immediately after the function entry point.
 void ARMException::BeginFunction(const MachineFunction *MF) {
-  Asm->OutStreamer.EmitFnStart();
+  getTargetStreamer().emitFnStart();
   if (Asm->MF->getFunction()->needsUnwindTableEntry())
     Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
                                                   Asm->getFunctionNumber()));
@@ -71,30 +67,76 @@ void ARMException::BeginFunction(const MachineFunction *MF) {
 /// EndFunction - Gather and emit post-function exception information.
 ///
 void ARMException::EndFunction() {
+  ARMTargetStreamer &ATS = getTargetStreamer();
   if (!Asm->MF->getFunction()->needsUnwindTableEntry())
-    Asm->OutStreamer.EmitCantUnwind();
+    ATS.emitCantUnwind();
   else {
     Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
                                                   Asm->getFunctionNumber()));
 
-    // Emit references to personality.
-    if (const Function * Personality =
-        MMI->getPersonalities()[MMI->getPersonalityIndex()]) {
-      MCSymbol *PerSym = Asm->Mang->getSymbol(Personality);
-      Asm->OutStreamer.EmitSymbolAttribute(PerSym, MCSA_Global);
-      Asm->OutStreamer.EmitPersonality(PerSym);
-    }
-
-    if (EnableARMEHABI == ExceptionHandling::ARMEHABIFull) {
+    if (EnableARMEHABIDescriptors) {
       // Map all labels and get rid of any dead landing pads.
       MMI->TidyLandingPads();
 
-      Asm->OutStreamer.EmitHandlerData();
+      if (!MMI->getLandingPads().empty()) {
+        // Emit references to personality.
+        if (const Function * Personality =
+            MMI->getPersonalities()[MMI->getPersonalityIndex()]) {
+          MCSymbol *PerSym = Asm->getSymbol(Personality);
+          Asm->OutStreamer.EmitSymbolAttribute(PerSym, MCSA_Global);
+          ATS.emitPersonality(PerSym);
+        }
 
-      // Emit actual exception table
-      EmitExceptionTable();
+        // Emit .handlerdata directive.
+        ATS.emitHandlerData();
+
+        // Emit actual exception table
+        EmitExceptionTable();
+      }
     }
   }
 
-  Asm->OutStreamer.EmitFnEnd();
+  ATS.emitFnEnd();
+}
+
+void ARMException::EmitTypeInfos(unsigned TTypeEncoding) {
+  const std::vector<const GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
+  const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
+
+  bool VerboseAsm = Asm->OutStreamer.isVerboseAsm();
+
+  int Entry = 0;
+  // Emit the Catch TypeInfos.
+  if (VerboseAsm && !TypeInfos.empty()) {
+    Asm->OutStreamer.AddComment(">> Catch TypeInfos <<");
+    Asm->OutStreamer.AddBlankLine();
+    Entry = TypeInfos.size();
+  }
+
+  for (std::vector<const GlobalVariable *>::const_reverse_iterator
+         I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
+    const GlobalVariable *GV = *I;
+    if (VerboseAsm)
+      Asm->OutStreamer.AddComment("TypeInfo " + Twine(Entry--));
+    Asm->EmitTTypeReference(GV, TTypeEncoding);
+  }
+
+  // Emit the Exception Specifications.
+  if (VerboseAsm && !FilterIds.empty()) {
+    Asm->OutStreamer.AddComment(">> Filter TypeInfos <<");
+    Asm->OutStreamer.AddBlankLine();
+    Entry = 0;
+  }
+  for (std::vector<unsigned>::const_iterator
+         I = FilterIds.begin(), E = FilterIds.end(); I < E; ++I) {
+    unsigned TypeID = *I;
+    if (VerboseAsm) {
+      --Entry;
+      if (TypeID != 0)
+        Asm->OutStreamer.AddComment("FilterInfo " + Twine(Entry));
+    }
+
+    Asm->EmitTTypeReference((TypeID == 0 ? 0 : TypeInfos[TypeID - 1]),
+                            TTypeEncoding);
+  }
 }