Index: llvm/trunk/include/llvm-c/Target.h
===================================================================
--- llvm/trunk/include/llvm-c/Target.h
+++ llvm/trunk/include/llvm-c/Target.h
@@ -183,6 +183,20 @@
 
 /*===-- Target Data -------------------------------------------------------===*/
 
+/**
+ * Obtain the data layout for a module.
+ *
+ * @see Module::getDataLayout()
+ */
+LLVMTargetDataRef LLVMGetModuleDataLayout(LLVMModuleRef M);
+
+/**
+ * Set the data layout for a module.
+ *
+ * @see Module::setDataLayout()
+ */
+void LLVMSetModuleDataLayout(LLVMModuleRef M, LLVMTargetDataRef DL);
+
 /** Creates target data from a target layout string.
     See the constructor llvm::DataLayout::DataLayout. */
 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep);
Index: llvm/trunk/include/llvm-c/TargetMachine.h
===================================================================
--- llvm/trunk/include/llvm-c/TargetMachine.h
+++ llvm/trunk/include/llvm-c/TargetMachine.h
@@ -115,6 +115,9 @@
   LLVMDisposeMessage. */
 char *LLVMGetTargetMachineFeatureString(LLVMTargetMachineRef T);
 
+/** Create a DataLayout based on the targetMachine. */
+LLVMTargetDataRef LLVMCreateTargetDataLayout(LLVMTargetMachineRef T);
+
 /** Set the target machine's ASM verbosity. */
 void LLVMSetTargetMachineAsmVerbosity(LLVMTargetMachineRef T,
                                       LLVMBool VerboseAsm);
Index: llvm/trunk/lib/Target/Target.cpp
===================================================================
--- llvm/trunk/lib/Target/Target.cpp
+++ llvm/trunk/lib/Target/Target.cpp
@@ -42,6 +42,14 @@
   initializeTarget(*unwrap(R));
 }
 
+LLVMTargetDataRef LLVMGetModuleDataLayout(LLVMModuleRef M) {
+  return wrap(&unwrap(M)->getDataLayout());
+}
+
+void LLVMSetModuleDataLayout(LLVMModuleRef M, LLVMTargetDataRef DL) {
+  unwrap(M)->setDataLayout(*unwrap(DL));
+}
+
 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep) {
   return wrap(new DataLayout(StringRep));
 }
Index: llvm/trunk/lib/Target/TargetMachineC.cpp
===================================================================
--- llvm/trunk/lib/Target/TargetMachineC.cpp
+++ llvm/trunk/lib/Target/TargetMachineC.cpp
@@ -171,6 +171,10 @@
   unwrap(T)->Options.MCOptions.AsmVerbose = VerboseAsm;
 }
 
+LLVMTargetDataRef LLVMCreateTargetDataLayout(LLVMTargetMachineRef T) {
+  return wrap(new DataLayout(unwrap(T)->createDataLayout()));
+}
+
 static LLVMBool LLVMTargetMachineEmit(LLVMTargetMachineRef T, LLVMModuleRef M,
                                       raw_pwrite_stream &OS,
                                       LLVMCodeGenFileType codegen,
Index: llvm/trunk/test/Bindings/llvm-c/echo.ll
===================================================================
--- llvm/trunk/test/Bindings/llvm-c/echo.ll
+++ llvm/trunk/test/Bindings/llvm-c/echo.ll
@@ -2,6 +2,9 @@
 ; RUN: llvm-as < %s | llvm-c-test --echo > %t.echo
 ; RUN: diff -w %t.orig %t.echo
 
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
 %S = type { i64, %S* }
 
 define { i64, %S* } @unpackrepack(%S %s) {
Index: llvm/trunk/tools/llvm-c-test/echo.cpp
===================================================================
--- llvm/trunk/tools/llvm-c-test/echo.cpp
+++ llvm/trunk/tools/llvm-c-test/echo.cpp
@@ -16,6 +16,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm-c-test.h"
+#include "llvm-c/Target.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/Support/ErrorHandling.h"
 
@@ -629,6 +630,11 @@
   LLVMContextRef Ctx = LLVMContextCreate();
   LLVMModuleRef M = LLVMModuleCreateWithNameInContext("<stdin>", Ctx);
 
+  LLVMSetTarget(M, LLVMGetTarget(Src));
+  LLVMSetModuleDataLayout(M, LLVMGetModuleDataLayout(Src));
+  if (strcmp(LLVMGetDataLayoutStr(M), LLVMGetDataLayoutStr(Src)))
+    report_fatal_error("Inconsistent DataLayout string representation");
+
   clone_functions(Src, M);
   char *Str = LLVMPrintModuleToString(M);
   fputs(Str, stdout);