Revert "Add support for attribute 'noescape'."

This reverts commit r313722.

It looks like compiler-rt/lib/tsan/rtl/tsan_libdispatch_mac.cc cannot be
compiled because some of the functions declared in the file do not match
the ones in the SDK headers (which are annotated with 'noescape').

llvm-svn: 313725

1 files changed, 0 insertions, 19 deletions

diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index cffb860638d..b8432ebd53b 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -1531,22 +1531,6 @@ static void handleReturnsNonNullAttr(Sema &S, Decl *D,
                                Attr.getAttributeSpellingListIndex()));
 }
 
-static void handleNoEscapeAttr(Sema &S, Decl *D, const AttributeList &Attr) {
-  if (D->isInvalidDecl())
-    return;
-
-  // noescape only applies to pointer types.
-  QualType T = cast<ParmVarDecl>(D)->getType();
-  if (!S.isValidPointerAttrType(T, /* RefOkay */ true)) {
-    S.Diag(Attr.getLoc(), diag::warn_attribute_pointers_only)
-        << Attr.getName() << Attr.getRange() << 0;
-    return;
-  }
-
-  D->addAttr(::new (S.Context) NoEscapeAttr(
-      Attr.getRange(), S.Context, Attr.getAttributeSpellingListIndex()));
-}
-
 static void handleAssumeAlignedAttr(Sema &S, Decl *D,
                                     const AttributeList &Attr) {
   Expr *E = Attr.getArgAsExpr(0),
@@ -6183,9 +6167,6 @@ static void ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D,
   case AttributeList::AT_ReturnsNonNull:
     handleReturnsNonNullAttr(S, D, Attr);
     break;
-  case AttributeList::AT_NoEscape:
-    handleNoEscapeAttr(S, D, Attr);
-    break;
   case AttributeList::AT_AssumeAligned:
     handleAssumeAlignedAttr(S, D, Attr);
     break;