X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FCodeGen%2FAsmPrinter%2FARMException.cpp;h=0bad7954b98091073b3f456861771cd91943e808;hp=e5a7d05f4c598a72cde1aeaebb5281120c9f8c11;hb=890c16626f63ca0978b705e173ed9e5a0068d418;hpb=7908480e4caf2f7ecb0b62c900039d49e7d51ebb

diff --git a/lib/CodeGen/AsmPrinter/ARMException.cpp b/lib/CodeGen/AsmPrinter/ARMException.cpp
index e5a7d05f4c5..0bad7954b98 100644
--- a/lib/CodeGen/AsmPrinter/ARMException.cpp
+++ b/lib/CodeGen/AsmPrinter/ARMException.cpp
@@ -12,89 +12,133 @@
 //===----------------------------------------------------------------------===//
 
 #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/Mangler.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/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"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegisterInfo.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));
-
-
-ARMException::ARMException(AsmPrinter *A)
-  : DwarfException(A),
-    shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
-    {}
+ARMException::ARMException(AsmPrinter *A) : DwarfCFIExceptionBase(A) {}
 
 ARMException::~ARMException() {}
 
-void ARMException::EndModule() {
+ARMTargetStreamer &ARMException::getTargetStreamer() {
+  MCTargetStreamer &TS = *Asm->OutStreamer->getTargetStreamer();
+  return static_cast<ARMTargetStreamer &>(TS);
 }
 
-/// 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();
-  if (Asm->MF->getFunction()->needsUnwindTableEntry())
-    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
-                                                  Asm->getFunctionNumber()));
+/// endModule - Emit all exception information that should come after the
+/// content.
+void ARMException::endModule() {
+  if (shouldEmitCFI)
+    Asm->OutStreamer->EmitCFISections(false, true);
 }
 
-/// EndFunction - Gather and emit post-function exception information.
-///
-void ARMException::EndFunction() {
-  if (!Asm->MF->getFunction()->needsUnwindTableEntry())
-    Asm->OutStreamer.EmitCantUnwind();
-  else {
-    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
-                                                  Asm->getFunctionNumber()));
+void ARMException::beginFunction(const MachineFunction *MF) {
+  if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+    getTargetStreamer().emitFnStart();
+  // See if we need call frame info.
+  AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
+  assert(MoveType != AsmPrinter::CFI_M_EH &&
+         "non-EH CFI not yet supported in prologue with EHABI lowering");
+  if (MoveType == AsmPrinter::CFI_M_Debug) {
+    shouldEmitCFI = true;
+    Asm->OutStreamer->EmitCFIStartProc(false);
+  }
+}
 
+/// endFunction - Gather and emit post-function exception information.
+///
+void ARMException::endFunction(const MachineFunction *MF) {
+  ARMTargetStreamer &ATS = getTargetStreamer();
+  const Function *F = MF->getFunction();
+  const Function *Per = nullptr;
+  if (F->hasPersonalityFn())
+    Per = dyn_cast<Function>(F->getPersonalityFn()->stripPointerCasts());
+  assert(!MMI->getPersonality() || Per == MMI->getPersonality());
+  bool forceEmitPersonality =
+    F->hasPersonalityFn() && !isNoOpWithoutInvoke(classifyEHPersonality(Per)) &&
+    F->needsUnwindTableEntry();
+  bool shouldEmitPersonality = forceEmitPersonality ||
+    !MMI->getLandingPads().empty();
+  if (!Asm->MF->getFunction()->needsUnwindTableEntry() &&
+      !shouldEmitPersonality)
+    ATS.emitCantUnwind();
+  else if (shouldEmitPersonality) {
     // 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 (Per) {
+      MCSymbol *PerSym = Asm->getSymbol(Per);
+      Asm->OutStreamer->EmitSymbolAttribute(PerSym, MCSA_Global);
+      ATS.emitPersonality(PerSym);
     }
 
-    if (EnableARMEHABI == ExceptionHandling::ARMEHABIFull) {
-      // Map all labels and get rid of any dead landing pads.
-      MMI->TidyLandingPads();
+    // Emit .handlerdata directive.
+    ATS.emitHandlerData();
 
-      Asm->OutStreamer.EmitHandlerData();
+    // Emit actual exception table
+    emitExceptionTable();
+  }
 
-      // Emit actual exception table
-      EmitExceptionTable();
-    }
+  if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+    ATS.emitFnEnd();
+}
+
+void ARMException::emitTypeInfos(unsigned TTypeEncoding) {
+  const std::vector<const GlobalValue *> &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 GlobalValue *>::const_reverse_iterator
+         I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
+    const GlobalValue *GV = *I;
+    if (VerboseAsm)
+      Asm->OutStreamer->AddComment("TypeInfo " + Twine(Entry--));
+    Asm->EmitTTypeReference(GV, TTypeEncoding);
   }
 
-  Asm->OutStreamer.EmitFnEnd();
+  // 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 ? nullptr : TypeInfos[TypeID - 1]),
+                            TTypeEncoding);
+  }
 }