Please keep in 80 cols.

k, sorry. I simply don't have any editor that can simply draw a vertical line on the 80 cols..

+  if (FD->getAttr<NothrowAttr>())
+    ParamAttrsVec.push_back(
+ llvm::ParamAttrsWithIndex::get(ParamAttrsVec.size(), llvm::ParamAttr::NoUnwind));
+  if (FD->getAttr<NoReturnAttr>())
+    ParamAttrsVec.push_back(
+ llvm::ParamAttrsWithIndex::get(ParamAttrsVec.size(), llvm::ParamAttr::NoReturn));
+

More 80 col violations. I think these attributes should always be applied to "0", the function itself, so the first arg should be 0, not ParamAttrsVec.size(). Try a function that is both noreturn and nounwind.

Actually both failed when defining a function with noreturn and nothrow. They both throw a weird error on LLVM structures.. Do you mind checking this, please?

I've updated the patch to incorporate some of your feedback + simple handling of dllimport/dllexport and visibility.

Nuno
Index: test/CodeGen/noreturn.c
===================================================================
--- test/CodeGen/noreturn.c     (revision 0)
+++ test/CodeGen/noreturn.c     (revision 0)
@@ -0,0 +1,4 @@
+// RUN: clang -emit-llvm < %s | grep noreturn
+
+void f() __attribute__((noreturn));
+void f() {}
Index: test/CodeGen/nothrow.c
===================================================================
--- test/CodeGen/nothrow.c      (revision 0)
+++ test/CodeGen/nothrow.c      (revision 0)
@@ -0,0 +1,4 @@
+// RUN: clang -emit-llvm < %s | grep nounwind
+
+void f() __attribute__((nothrow));
+void f() {}
Index: test/CodeGen/weak-function.c
===================================================================
--- test/CodeGen/weak-function.c        (revision 0)
+++ test/CodeGen/weak-function.c        (revision 0)
@@ -0,0 +1,4 @@
+// RUN: clang -emit-llvm < %s | grep weak
+
+void f() __attribute__((weak));
+void f() {}
Index: test/CodeGen/function-visibility.c
===================================================================
--- test/CodeGen/function-visibility.c  (revision 0)
+++ test/CodeGen/function-visibility.c  (revision 0)
@@ -0,0 +1,4 @@
+// RUN: clang -emit-llvm < %s | grep hidden
+
+void f() __attribute__((visibility(hidden)));
+void f() {}
Index: test/CodeGen/weak-var.c
===================================================================
--- test/CodeGen/weak-var.c     (revision 0)
+++ test/CodeGen/weak-var.c     (revision 0)
@@ -0,0 +1,3 @@
+// RUN: clang -emit-llvm < %s | grep weak
+
+int i __attribute__((weak)) = 2;
Index: test/CodeGen/var-visibility.c
===================================================================
--- test/CodeGen/var-visibility.c       (revision 0)
+++ test/CodeGen/var-visibility.c       (revision 0)
@@ -0,0 +1,3 @@
+// RUN: clang -emit-llvm < %s | grep protected
+
+int globalvar __attribute__((visibility(protected)));
Index: test/Sema/deprecated.c
===================================================================
--- test/Sema/deprecated.c      (revision 47826)
+++ test/Sema/deprecated.c      (working copy)
@@ -13,7 +13,7 @@
  f(); // expected-warning {{'f' is deprecated}}

  // test if attributes propagate to functions
-  g(); // todo-warning {{'g' is deprecated}}
+  g(); // expected-warning {{'g' is deprecated}}

  return var; // expected-warning {{'var' is deprecated}}
}
@@ -21,5 +21,5 @@
// test if attributes propagate to variables
extern int var;
int w() {
-       return var; // todo-warning {{'var' is deprecated}}
+       return var; // expected-warning {{'var' is deprecated}}
}
Index: include/clang/Basic/DiagnosticKinds.def
===================================================================
--- include/clang/Basic/DiagnosticKinds.def     (revision 47826)
+++ include/clang/Basic/DiagnosticKinds.def     (working copy)
@@ -567,6 +567,14 @@
     "invalid vector type '%0'")
DIAG(err_attribute_argument_not_int, ERROR,
     "'%0' attribute requires integer constant")
+DIAG(err_attribute_argument_n_not_int, ERROR,
+     "'%0' attribute requires parameter %1 to be an integer constant")
+DIAG(err_attribute_argument_n_not_string, ERROR,
+     "'%0' attribute requires parameter %1 to be a string")
+DIAG(err_attribute_argument_out_of_bounds, ERROR,
+     "'%0' attribute parameter %1 is out of bounds")
+DIAG(err_format_strftime_third_parameter, ERROR,
+     "strftime format attribute requires 3rd parameter to be 0")
DIAG(err_attribute_invalid_size, ERROR,
     "vector size not an integral multiple of component size")
DIAG(err_attribute_zero_size, ERROR,
@@ -589,8 +597,12 @@
     "argument to annotate attribute was not a string literal")
DIAG(warn_attribute_ignored, WARNING,
  "'%0' attribute ignored")
+DIAG(warn_attribute_wrong_decl_type, WARNING,
+  "'%0' attribute only applies to %1 types")
DIAG(warn_attribute_ignored_for_field_of_type, WARNING,
  "'%0' attribute ignored for field of type '%1'")
+DIAG(warn_attribute_type_not_supported, WARNING,
+  "'%0' attribute argument not supported: '%1'")

// Function Parameter Semantic Analysis.
DIAG(err_param_with_void_type, ERROR,
Index: include/clang/AST/Attr.h
===================================================================
--- include/clang/AST/Attr.h    (revision 47826)
+++ include/clang/AST/Attr.h    (working copy)
@@ -14,6 +14,7 @@
#ifndef LLVM_CLANG_AST_ATTR_H
#define LLVM_CLANG_AST_ATTR_H

+#include "llvm/GlobalValue.h"
#include <cassert>
#include <string>

@@ -27,7 +28,13 @@
    Packed,
    Annotate,
    NoReturn,
-    Deprecated
+    Deprecated,
+    Weak,
+    DLLImport,
+    DLLExport,
+    NoThrow,
+    Format,
+    Visibility
  };
private:
@@ -118,6 +125,77 @@
  static bool classof(const DeprecatedAttr *A) { return true; }
};

+class WeakAttr : public Attr {
+public:
+  WeakAttr() : Attr(Weak) {}
+
+  // Implement isa/cast/dyncast/etc.
+
+  static bool classof(const Attr *A) { return A->getKind() == Weak; }
+  static bool classof(const WeakAttr *A) { return true; }
+};
+
+class NoThrowAttr : public Attr {
+public:
+  NoThrowAttr() : Attr(NoThrow) {}
+
+  // Implement isa/cast/dyncast/etc.
+
+  static bool classof(const Attr *A) { return A->getKind() == NoThrow; }
+  static bool classof(const NoThrowAttr *A) { return true; }
+};
+
+class FormatAttr : public Attr {
+  std::string Type;
+  int formatIdx, firstArg;
+public:
+  FormatAttr(const std::string &type, int idx, int first) : Attr(Format),
+             Type(type), formatIdx(idx), firstArg(first) {}
+
+  const std::string& getType() const { return Type; }
+  int getFormatIdx() const { return formatIdx; }
+  int getFirstArg() const { return firstArg; }
+
+  // Implement isa/cast/dyncast/etc.
+
+  static bool classof(const Attr *A) { return A->getKind() == Format; }
+  static bool classof(const FormatAttr *A) { return true; }
+};
+
+class VisibilityAttr : public Attr {
+  llvm::GlobalValue::VisibilityTypes VisibilityType;
+public:
+  VisibilityAttr(llvm::GlobalValue::VisibilityTypes v) : Attr(Visibility),
+                 VisibilityType(v) {}
+
+  llvm::GlobalValue::VisibilityTypes getVisibility() const { return 
VisibilityType; }
+
+  // Implement isa/cast/dyncast/etc.
+
+  static bool classof(const Attr *A) { return A->getKind() == Visibility; }
+  static bool classof(const VisibilityAttr *A) { return true; }
+};
+
+class DLLImportAttr : public Attr {
+public:
+  DLLImportAttr() : Attr(DLLImport) {}
+
+  // Implement isa/cast/dyncast/etc.
+
+  static bool classof(const Attr *A) { return A->getKind() == DLLImport; }
+  static bool classof(const DLLImportAttr *A) { return true; }
+};
+
+class DLLExportAttr : public Attr {
+public:
+  DLLExportAttr() : Attr(DLLExport) {}
+
+  // Implement isa/cast/dyncast/etc.
+
+  static bool classof(const Attr *A) { return A->getKind() == DLLExport; }
+  static bool classof(const DLLExportAttr *A) { return true; }
+};
+
}  // end namespace clang

#endif
Index: include/clang/Parse/AttributeList.h
===================================================================
--- include/clang/Parse/AttributeList.h (revision 47826)
+++ include/clang/Parse/AttributeList.h (working copy)
@@ -50,7 +50,19 @@
    AT_packed,
    AT_annotate,
    AT_noreturn,
-    AT_deprecated
+    AT_deprecated,
+    AT_unused,
+    AT_format,
+    AT_nonnull,
+    AT_malloc,
+    AT_pure,
+    AT_weak,
+    AT_dllimport,
+    AT_dllexport,
+    AT_visibility,
+    AT_nothrow,
+    AT_noinline,
+    AT_warn_unused_result
  };
IdentifierInfo *getName() const { return AttrName; }
Index: Sema/Sema.h
===================================================================
--- Sema/Sema.h (revision 47826)
+++ Sema/Sema.h (working copy)
@@ -273,6 +273,13 @@
  void HandlePackedAttribute(Decl *d, AttributeList *rawAttr);
  void HandleAnnotateAttribute(Decl *d, AttributeList *rawAttr);
  void HandleNoReturnAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleDeprecatedAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleWeakAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleDLLImportAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleDLLExportAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleVisibilityAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleNothrowAttribute(Decl *d, AttributeList *rawAttr);
+  void HandleFormatAttribute(Decl *d, AttributeList *rawAttr);
void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
                           bool &IncompleteImpl);
Index: Sema/SemaDecl.cpp
===================================================================
--- Sema/SemaDecl.cpp   (revision 47826)
+++ Sema/SemaDecl.cpp   (working copy)
@@ -242,6 +242,33 @@
  return New;
}

+/// DeclhasAttr - returns true if decl Declaration already has the target 
attribute.
+static bool DeclHasAttr(const Decl *decl, const Attr *target) {
+  for (const Attr *attr = decl->getAttrs(); attr; attr = attr->getNext())
+    if (attr->getKind() == target->getKind())
+      return true;
+
+  return false;
+}
+
+/// MergeAttributes - append attributes from the Old decl to the New one.
+static void MergeAttributes(Decl *New, Decl *Old) {
+  Attr *attr = const_cast<Attr*>(Old->getAttrs()), *tmp;
+
+// FIXME: fix this code to cleanup the Old attrs correctly
+  while (attr) {
+     tmp = attr;
+     attr = attr->getNext();
+
+    if (!DeclHasAttr(New, tmp)) {
+       New->addAttr(tmp);
+    } else {
+       tmp->setNext(0);
+       delete(tmp);
+    }
+  }
+}
+
/// MergeFunctionDecl - We just parsed a function 'New' which has the same name
/// and scope as a previous declaration 'Old'.  Figure out how to resolve this
/// situation, merging decls or emitting diagnostics as appropriate.
@@ -256,7 +283,8 @@
    return New;
  }

-  // FIXME: propagate old Attrs to the New decl
+  MergeAttributes(New, Old);
+
QualType OldQType = Old->getCanonicalType();
  QualType NewQType = New->getCanonicalType();
@@ -326,6 +354,9 @@
    Diag(OldD->getLocation(), diag::err_previous_definition);
    return New;
  }
+
+  MergeAttributes(New, Old);
+
  // Verify the types match.
if (Old->getCanonicalType() != New->getCanonicalType() && !areEquivalentArrayTypes(New->getCanonicalType(), Old->getCanonicalType())) {
@@ -1781,8 +1812,23 @@
    }
    break;
  case AttributeList::AT_deprecated:
-    New->addAttr(new DeprecatedAttr());
+    HandleDeprecatedAttribute(New, Attr);
    break;
+  case AttributeList::AT_visibility:
+    HandleVisibilityAttribute(New, Attr);
+    break;
+  case AttributeList::AT_weak:
+    HandleWeakAttribute(New, Attr);
+    break;
+  case AttributeList::AT_dllimport:
+    HandleDLLImportAttribute(New, Attr);
+    break;
+  case AttributeList::AT_dllexport:
+    HandleDLLExportAttribute(New, Attr);
+    break;
+  case AttributeList::AT_nothrow:
+    HandleNothrowAttribute(New, Attr);
+    break;
  case AttributeList::AT_aligned:
    HandleAlignedAttribute(New, Attr);
    break;
@@ -1795,6 +1841,9 @@
  case AttributeList::AT_noreturn:
    HandleNoReturnAttribute(New, Attr);
    break;
+  case AttributeList::AT_format:
+    HandleFormatAttribute(New, Attr);
+    break;
  default:
#if 0
    // TODO: when we have the full set of attributes, warn about unknown ones.
@@ -1952,6 +2001,177 @@
  d->addAttr(new NoReturnAttr());
}

+void Sema::HandleDeprecatedAttribute(Decl *d, AttributeList *rawAttr) {
+  // check the attribute arguments.
+  if (rawAttr->getNumArgs() != 0) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("0"));
+    return;
+  }
+
+  d->addAttr(new DeprecatedAttr());
+}
+
+void Sema::HandleVisibilityAttribute(Decl *d, AttributeList *rawAttr) {
+  // check the attribute arguments.
+  if (rawAttr->getNumArgs() != 0) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("1"));
+    return;
+  }
+
+  if (!rawAttr->getParameterName()) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_string,
+           "visibility", std::string("1"));
+    return;
+  }
+
+  const char *typeStr = rawAttr->getParameterName()->getName();
+  llvm::GlobalValue::VisibilityTypes type;
+
+  if (!memcmp(typeStr, "default", 7))
+    type = llvm::GlobalValue::DefaultVisibility;
+  else if (!memcmp(typeStr, "hidden", 6))
+    type = llvm::GlobalValue::HiddenVisibility;
+  else if (!memcmp(typeStr, "internal", 8))
+    type = llvm::GlobalValue::HiddenVisibility; // FIXME
+  else if (!memcmp(typeStr, "protected", 9))
+    type = llvm::GlobalValue::ProtectedVisibility;
+  else {
+    Diag(rawAttr->getLoc(), diag::warn_attribute_type_not_supported,
+           "visibility", typeStr);
+    return;
+  }
+
+  d->addAttr(new VisibilityAttr(type));
+}
+
+void Sema::HandleWeakAttribute(Decl *d, AttributeList *rawAttr) {
+  // check the attribute arguments.
+  if (rawAttr->getNumArgs() != 0) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("0"));
+    return;
+  }
+
+  d->addAttr(new WeakAttr());
+}
+
+void Sema::HandleDLLImportAttribute(Decl *d, AttributeList *rawAttr) {
+  // check the attribute arguments.
+  if (rawAttr->getNumArgs() != 0) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("0"));
+    return;
+  }
+
+  d->addAttr(new DLLImportAttr());
+}
+
+void Sema::HandleDLLExportAttribute(Decl *d, AttributeList *rawAttr) {
+  // check the attribute arguments.
+  if (rawAttr->getNumArgs() != 0) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("0"));
+    return;
+  }
+
+  d->addAttr(new DLLExportAttr());
+}
+
+void Sema::HandleNothrowAttribute(Decl *d, AttributeList *rawAttr) {
+  // check the attribute arguments.
+  if (rawAttr->getNumArgs() != 0) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("0"));
+    return;
+  }
+
+  d->addAttr(new NoThrowAttr());
+}
+
+void Sema::HandleFormatAttribute(Decl *d, AttributeList *rawAttr) {
+
+  if (!rawAttr->getParameterName()) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_string,
+           "format", std::string("1"));
+    return;
+  }
+
+  if (rawAttr->getNumArgs() != 2) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+         std::string("3"));
+    return;
+  }
+
+  FunctionDecl *Fn = dyn_cast<FunctionDecl>(d);
+  if (!Fn) {
+    Diag(rawAttr->getLoc(), diag::warn_attribute_wrong_decl_type,
+           "format", "function");
+    return;
+  }
+
+  // FIXME: in C++ the implicit 'this' function parameter also counts.
+  // the index must start in 1 and the limit is numargs+1
+  unsigned NumArgs = Fn->getNumParams()+1; // +1 for ...
+
+  const char *Format = rawAttr->getParameterName()->getName();
+  unsigned FormatLen = rawAttr->getParameterName()->getLength();
+
+  // Normalize the argument, __foo__ becomes foo.
+  if (FormatLen > 4 && Format[0] == '_' && Format[1] == '_' &&
+      Format[FormatLen - 2] == '_' && Format[FormatLen - 1] == '_') {
+    Format += 2;
+    FormatLen -= 4;
+  }
+
+  if (!((FormatLen == 5 && !memcmp(Format, "scanf", 5))
+     || (FormatLen == 6 && !memcmp(Format, "printf", 6))
+     || (FormatLen == 7 && !memcmp(Format, "strfmon", 7))
+     || (FormatLen == 8 && !memcmp(Format, "strftime", 8)))) {
+    Diag(rawAttr->getLoc(), diag::warn_attribute_type_not_supported,
+           "format", rawAttr->getParameterName()->getName());
+    return;
+  }
+
+  Expr *IdxExpr = static_cast<Expr *>(rawAttr->getArg(0));
+  llvm::APSInt Idx(32);
+  if (!IdxExpr->isIntegerConstantExpr(Idx, Context)) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_int,
+           "format", std::string("2"), IdxExpr->getSourceRange());
+    return;
+  }
+
+  if (Idx.getZExtValue() < 1 || Idx.getZExtValue() > NumArgs) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_argument_out_of_bounds,
+           "format", std::string("2"), IdxExpr->getSourceRange());
+    return;
+  }
+
+  Expr *FirstArgExpr = static_cast<Expr *>(rawAttr->getArg(1));
+  llvm::APSInt FirstArg(32);
+  if (!FirstArgExpr->isIntegerConstantExpr(FirstArg, Context)) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_int,
+           "format", std::string("3"), FirstArgExpr->getSourceRange());
+    return;
+  }
+
+  if (FormatLen == 8 && !memcmp(Format, "strftime", 8)) {
+    if (FirstArg.getZExtValue() != 0) {
+      Diag(rawAttr->getLoc(), diag::err_format_strftime_third_parameter,
+             FirstArgExpr->getSourceRange());
+      return;
+    }
+  } else if (FirstArg.getZExtValue() > NumArgs) {
+    Diag(rawAttr->getLoc(), diag::err_attribute_argument_out_of_bounds,
+           "format", std::string("3"), FirstArgExpr->getSourceRange());
+    return;
+  }
+
+  d->addAttr(new FormatAttr(std::string(Format, FormatLen),
+                            Idx.getZExtValue(), FirstArg.getZExtValue()));
+}
+
void Sema::HandleAnnotateAttribute(Decl *d, AttributeList *rawAttr) {
  // check the attribute arguments.
  if (rawAttr->getNumArgs() != 1) {
Index: CodeGen/CodeGenModule.cpp
===================================================================
--- CodeGen/CodeGenModule.cpp   (revision 47826)
+++ CodeGen/CodeGenModule.cpp   (working copy)
@@ -242,25 +242,38 @@
  assert(GV->getType()->getElementType() == Init->getType() &&
         "Initializer codegen type mismatch!");
  GV->setInitializer(Init);
+
+  if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>())
+    GV->setVisibility(attr->getVisibility());
+  // FIXME: else handle -fvisibility
// Set the llvm linkage type as appropriate.
-  // FIXME: This isn't right.  This should handle common linkage and other
-  // stuff.
-  switch (D->getStorageClass()) {
-  case VarDecl::Auto:
-  case VarDecl::Register:
-    assert(0 && "Can't have auto or register globals");
-  case VarDecl::None:
-    if (!D->getInit())
-      GV->setLinkage(llvm::GlobalVariable::WeakLinkage);
-    break;
-  case VarDecl::Extern:
-  case VarDecl::PrivateExtern:
-    // todo: common
-    break;
-  case VarDecl::Static:
-    GV->setLinkage(llvm::GlobalVariable::InternalLinkage);
-    break;
+  if (D->getAttr<DLLImportAttr>())
+    GV->setLinkage(llvm::Function::DLLImportLinkage);
+  else if (D->getAttr<DLLExportAttr>())
+    GV->setLinkage(llvm::Function::DLLExportLinkage);
+  else if (D->getAttr<WeakAttr>()) {
+    GV->setLinkage(llvm::GlobalVariable::WeakLinkage);
+
+  } else {
+    // FIXME: This isn't right.  This should handle common linkage and other
+    // stuff.
+    switch (D->getStorageClass()) {
+    case VarDecl::Auto:
+    case VarDecl::Register:
+      assert(0 && "Can't have auto or register globals");
+    case VarDecl::None:
+      if (!D->getInit())
+        GV->setLinkage(llvm::GlobalVariable::WeakLinkage);
+      break;
+    case VarDecl::Extern:
+    case VarDecl::PrivateExtern:
+      // todo: common
+      break;
+    case VarDecl::Static:
+      GV->setLinkage(llvm::GlobalVariable::InternalLinkage);
+      break;
+    }
  }
}

Index: CodeGen/CodeGenFunction.cpp
===================================================================
--- CodeGen/CodeGenFunction.cpp (revision 47826)
+++ CodeGen/CodeGenFunction.cpp (working copy)
@@ -18,6 +18,7 @@
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
+#include "llvm/ParamAttrsList.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Support/CFG.h"
using namespace clang;
@@ -67,11 +68,33 @@
// TODO: Set up linkage and many other things. Note, this is a simple // approximation of what we really want.
-  if (FD->getStorageClass() == FunctionDecl::Static)
+  if (FD->getAttr<DLLImportAttr>())
+    CurFn->setLinkage(llvm::Function::DLLImportLinkage);
+  else if (FD->getAttr<DLLExportAttr>())
+    CurFn->setLinkage(llvm::Function::DLLExportLinkage);
+  else if (FD->getAttr<WeakAttr>() || FD->isInline())
+    CurFn->setLinkage(llvm::Function::WeakLinkage);
+  else if (FD->getStorageClass() == FunctionDecl::Static)
    CurFn->setLinkage(llvm::Function::InternalLinkage);
-  else if (FD->isInline())
-    CurFn->setLinkage(llvm::Function::WeakLinkage);
- +
+  if (const VisibilityAttr *attr = FD->getAttr<VisibilityAttr>())
+    CurFn->setVisibility(attr->getVisibility());
+  // FIXME: else handle -fvisibility
+
+
+  llvm::ParamAttrsVector ParamAttrsVec;
+
+  if (FD->getAttr<NoThrowAttr>())
+    ParamAttrsVec.push_back(
+     llvm::ParamAttrsWithIndex::get(ParamAttrsVec.size(), 
llvm::ParamAttr::NoUnwind));
+  if (FD->getAttr<NoReturnAttr>())
+    ParamAttrsVec.push_back(
+     llvm::ParamAttrsWithIndex::get(ParamAttrsVec.size(), 
llvm::ParamAttr::NoReturn));
+
+  if (!ParamAttrsVec.empty())
+    CurFn->setParamAttrs(llvm::ParamAttrsList::get(ParamAttrsVec));
+
+
  llvm::BasicBlock *EntryBB = new llvm::BasicBlock("entry", CurFn);
// Create a marker to make it easy to insert allocas into the entryblock
Index: Parse/AttributeList.cpp
===================================================================
--- Parse/AttributeList.cpp     (revision 47826)
+++ Parse/AttributeList.cpp     (working copy)
@@ -51,18 +51,33 @@
  }

  switch (Len) {
- case 6: + case 4:
+    if (!memcmp(Str, "weak", 4)) return AT_weak;
+    if (!memcmp(Str, "pure", 4)) return AT_pure;
+    break;
+  case 6:
    if (!memcmp(Str, "packed", 6)) return AT_packed;
+    if (!memcmp(Str, "malloc", 6)) return AT_malloc;
+    if (!memcmp(Str, "format", 6)) return AT_format;
+    if (!memcmp(Str, "unused", 6)) return AT_unused;
    break;
  case 7:
    if (!memcmp(Str, "aligned", 7)) return AT_aligned;
+    if (!memcmp(Str, "nothrow", 7)) return AT_nothrow;
+    if (!memcmp(Str, "nonnull", 7)) return AT_nonnull;
    break;
  case 8:
    if (!memcmp(Str, "annotate", 8)) return AT_annotate;
    if (!memcmp(Str, "noreturn", 8)) return AT_noreturn;
+    if (!memcmp(Str, "noinline", 8)) return AT_noinline;
    break;
+  case 9:
+    if (!memcmp(Str, "dllimport", 9)) return AT_dllimport;
+    if (!memcmp(Str, "dllexport", 9)) return AT_dllexport;
+    break;
  case 10:
    if (!memcmp(Str, "deprecated", 10)) return AT_deprecated;
+    if (!memcmp(Str, "visibility", 10)) return AT_visibility;
    break;
  case 11:
    if (!memcmp(Str, "vector_size", 11)) return AT_vector_size;
@@ -73,6 +88,9 @@
  case 15:
    if (!memcmp(Str, "ocu_vector_type", 15)) return AT_ocu_vector_type;
    break;
- } + case 18:
+    if (!memcmp(Str, "warn_unused_result", 18)) return AT_warn_unused_result;
+    break;
+  }
  return UnknownAttribute;
}
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