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, 5 deletions

diff --git a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
index 73198b1..86baccb6 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
@@ -25,12 +25,12 @@ SystemZTargetMachine::SystemZTargetMachine(const Target &T, StringRef TT,
                                            const TargetOptions &Options,
                                            Reloc::Model RM, CodeModel::Model CM,
                                            CodeGenOpt::Level OL)
-    : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
+    // Make sure that global data has at least 16 bits of alignment by
+    // default, so that we can refer to it using LARL.  We don't have any
+    // special requirements for stack variables though.
+    : LLVMTargetMachine(T, "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-a:8:16-n32:64",
+                        TT, CPU, FS, Options, RM, CM, OL),
       TLOF(make_unique<TargetLoweringObjectFileELF>()),
-      // Make sure that global data has at least 16 bits of alignment by
-      // default, so that we can refer to it using LARL.  We don't have any
-      // special requirements for stack variables though.
-      DL("E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-a:8:16-n32:64"),
       Subtarget(TT, CPU, FS, *this) {
   initAsmInfo();
 }