[PM] Port TTI to the new pass manager, introducing a TargetIRAnalysis to

produce it.

This adds a function to the TargetMachine that produces this analysis
via a callback for each function. This in turn faves the way to produce
a *different* TTI per-function with the correct subtarget cached.

I've also done the necessary wiring in the opt tool to thread the target
machine down and make it available to the pass registry so that we can
construct this analysis from a target machine when available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227721 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/TargetTransformInfo.cpp

@@ -14,6 +14,7 @@
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Module.h"
 #include "llvm/IR/Operator.h"
 #include "llvm/Support/ErrorHandling.h"
 
@@ -255,6 +256,22 @@ Value *TargetTransformInfo::getOrCreateResultFromMemIntrinsic(
 
 TargetTransformInfo::Concept::~Concept() {}
 
+TargetIRAnalysis::TargetIRAnalysis() : TTICallback(&getDefaultTTI) {}
+
+TargetIRAnalysis::TargetIRAnalysis(
+    std::function<Result(Function &)> TTICallback)
+    : TTICallback(TTICallback) {}
+
+TargetIRAnalysis::Result TargetIRAnalysis::run(Function &F) {
+  return TTICallback(F);
+}
+
+char TargetIRAnalysis::PassID;
+
+TargetIRAnalysis::Result TargetIRAnalysis::getDefaultTTI(Function &F) {
+  return Result(F.getParent()->getDataLayout());
+}
+
 // Register the basic pass.
 INITIALIZE_PASS(TargetTransformInfoWrapperPass, "tti",
                 "Target Transform Information", false, true)