Temporarily revert r337226 "Restructure checking for, and warning on, lifetime extension."

This change breaks on ARM because pointers to clang::InitializedEntity are only
4 byte aligned and do not have 3 bits to store values. A possible solution
would be to change the fields in clang::InitializedEntity to enforce a bigger
alignment requirement.

The error message is

llvm/include/llvm/ADT/PointerIntPair.h:132:3: error: static_assert failed "PointerIntPair with integer size too large for pointer"
  static_assert(IntBits <= PtrTraits::NumLowBitsAvailable,
include/llvm/ADT/PointerIntPair.h:73:13: note: in instantiation of template class 'llvm::PointerIntPairInfo<const clang::InitializedEntity *, 3, llvm::PointerLikeTypeTraits<const clang::InitializedEntity *> >' requested here
    Value = Info::updateInt(Info::updatePointer(0, PtrVal),
llvm/include/llvm/ADT/PointerIntPair.h:51:5: note: in instantiation of member function 'llvm::PointerIntPair<const clang::InitializedEntity *, 3, (anonymous namespace)::LifetimeKind, llvm::PointerLikeTypeTraits<const clang::InitializedEntity *>, llvm::PointerIntPairInfo<const clang::InitializedEntity *, 3, llvm::PointerLikeTypeTraits<const clang::InitializedEntity *> > >::setPointerAndInt' requested here
    setPointerAndInt(PtrVal, IntVal);
    ^
llvm/tools/clang/lib/Sema/SemaInit.cpp:6237:12: note: in instantiation of member function 'llvm::PointerIntPair<const clang::InitializedEntity *, 3, (anonymous namespace)::LifetimeKind, llvm::PointerLikeTypeTraits<const clang::InitializedEntity *>, llvm::PointerIntPairInfo<const clang::InitializedEntity *, 3, llvm::PointerLikeTypeTraits<const clang::InitializedEntity *> > >::PointerIntPair' requested here
    return {Entity, LK_Extended};

Full log here:
http://lab.llvm.org:8011/builders/clang-cmake-armv7-global-isel/builds/1330
http://lab.llvm.org:8011/builders/clang-cmake-armv7-full/builds/1394

llvm-svn: 337255

1 files changed, 30 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp b/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp
index 0184a1d6e73..3299763997e 100644
--- a/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp
+++ b/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp
@@ -236,6 +236,36 @@ void fn9() {
   // CHECK: ret void
 }
 
+struct haslist1 {
+  std::initializer_list<int> il;
+  haslist1(int i);
+};
+
+// CHECK-LABEL: define void @_ZN8haslist1C2Ei
+haslist1::haslist1(int i)
+// CHECK: alloca [3 x i32]
+// CHECK: store i32 %
+// CHECK: store i32 2
+// CHECK: store i32 3
+  : il{i, 2, 3}
+{
+  destroyme2 dm2;
+}
+
+struct haslist2 {
+  std::initializer_list<destroyme1> il;
+  haslist2();
+};
+
+// CHECK-LABEL: define void @_ZN8haslist2C2Ev
+haslist2::haslist2()
+  : il{destroyme1(), destroyme1()}
+{
+  destroyme2 dm2;
+  // CHECK: call void @_ZN10destroyme2D1Ev
+  // CHECK: call void @_ZN10destroyme1D1Ev
+}
+
 void fn10(int i) {
   // CHECK-LABEL: define void @_Z4fn10i
   // CHECK: alloca [3 x i32]