Remove getDataLayout() from Instruction/GlobalValue/BasicBlock/Function

Summary:
This does not conceptually belongs here. Instead provide a shortcut
getModule() that provides access to the DataLayout.

Reviewers: chandlerc, echristo

Reviewed By: echristo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8027

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 231147
diff --git a/llvm/lib/IR/Instruction.cpp b/llvm/lib/IR/Instruction.cpp
index 92c6e9f..7d9bd7e 100644
--- a/llvm/lib/IR/Instruction.cpp
+++ b/llvm/lib/IR/Instruction.cpp
@@ -32,10 +32,6 @@
   }
 }
 
-const DataLayout *Instruction::getDataLayout() const {
-  return getParent()->getDataLayout();
-}
-
 Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
                          BasicBlock *InsertAtEnd)
   : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(nullptr) {
@@ -58,6 +54,10 @@
   Parent = P;
 }
 
+const Module *Instruction::getModule() const {
+  return getParent()->getModule();
+}
+
 void Instruction::removeFromParent() {
   getParent()->getInstList().remove(this);
 }