Reverted commits 333390, 333391 and 333394

Build of shared library LLVMDemangle.so fails due to dependency problem.

llvm-svn: 333395
diff --git a/llvm/lib/IR/DataLayout.cpp b/llvm/lib/IR/DataLayout.cpp
index 62c6712..fff2f67 100644
--- a/llvm/lib/IR/DataLayout.cpp
+++ b/llvm/lib/IR/DataLayout.cpp
@@ -596,8 +596,10 @@
   // Otherwise, create the struct layout.  Because it is variable length, we
   // malloc it, then use placement new.
   int NumElts = Ty->getNumElements();
-  StructLayout *L = (StructLayout *)
-      safe_malloc(sizeof(StructLayout)+(NumElts-1) * sizeof(uint64_t));
+  StructLayout *L =
+    (StructLayout *)malloc(sizeof(StructLayout)+(NumElts-1) * sizeof(uint64_t));
+  if (L == nullptr)
+    report_bad_alloc_error("Allocation of StructLayout elements failed.");
 
   // Set SL before calling StructLayout's ctor.  The ctor could cause other
   // entries to be added to TheMap, invalidating our reference.