Move the DataLayout to the generic TargetMachine, making it mandatory.

Summary:
I don't know why every singled backend had to redeclare its own DataLayout.
There was a virtual getDataLayout() on the common base TargetMachine, the
default implementation returned nullptr. It was not clear from this that
we could assume at call site that a DataLayout will be available with
each Target.

Now getDataLayout() is no longer virtual and return a pointer to the
DataLayout member of the common base TargetMachine. I plan to turn it into
a reference in a future patch.

The only backend that didn't have a DataLayout previsouly was the CPPBackend.
It now initializes the default DataLayout. This commit is NFC for all the
other backends.

Test Plan: clang+llvm ninja check-all

Reviewers: echristo

Subscribers: jfb, jholewinski, llvm-commits

Differential Revision: http://reviews.llvm.org/D8243

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 231987

1 files changed, 5 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/LLVMTargetMachine.cpp b/llvm/lib/CodeGen/LLVMTargetMachine.cpp
index c0c894b..6ba3ef1 100644
--- a/llvm/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/llvm/lib/CodeGen/LLVMTargetMachine.cpp
@@ -66,12 +66,13 @@ void LLVMTargetMachine::initAsmInfo() {
   AsmInfo = TmpAsmInfo;
 }
 
-LLVMTargetMachine::LLVMTargetMachine(const Target &T, StringRef Triple,
-                                     StringRef CPU, StringRef FS,
-                                     TargetOptions Options,
+LLVMTargetMachine::LLVMTargetMachine(const Target &T,
+                                     StringRef DataLayoutString,
+                                     StringRef Triple, StringRef CPU,
+                                     StringRef FS, TargetOptions Options,
                                      Reloc::Model RM, CodeModel::Model CM,
                                      CodeGenOpt::Level OL)
-  : TargetMachine(T, Triple, CPU, FS, Options) {
+    : TargetMachine(T, DataLayoutString, Triple, CPU, FS, Options) {
   CodeGenInfo = T.createMCCodeGenInfo(Triple, RM, CM, OL);
 }