From d85ffb1fc01281f0a3a3928a7207ddda991500c2 Mon Sep 17 00:00:00 2001
From: Eric Christopher <echristo@gmail.com>
Date: Thu, 18 Sep 2014 00:34:14 +0000
Subject: Add a new pass FunctionTargetTransformInfo. This pass serves as a
 shim between the TargetTransformInfo immutable pass and the Subtarget via the
 TargetMachine and Function. Migrate a single call from
 BasicTargetTransformInfo as an example and provide shims where TargetMachine
 begins taking a Function to determine the subtarget.

No functional change.

llvm-svn: 218004
---
 llvm/lib/Analysis/FunctionTargetTransformInfo.cpp | 50 +++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 llvm/lib/Analysis/FunctionTargetTransformInfo.cpp

(limited to 'llvm/lib/Analysis/FunctionTargetTransformInfo.cpp')

diff --git a/llvm/lib/Analysis/FunctionTargetTransformInfo.cpp b/llvm/lib/Analysis/FunctionTargetTransformInfo.cpp
new file mode 100644
index 0000000..a686bec
--- /dev/null
+++ b/llvm/lib/Analysis/FunctionTargetTransformInfo.cpp
@@ -0,0 +1,50 @@
+//===- llvm/Analysis/FunctionTargetTransformInfo.h --------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass wraps a TargetTransformInfo in a FunctionPass so that it can
+// forward along the current Function so that we can make target specific
+// decisions based on the particular subtarget specified for each Function.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/InitializePasses.h"
+#include "llvm/Analysis/FunctionTargetTransformInfo.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "function-tti"
+static const char ftti_name[] = "Function TargetTransformInfo";
+INITIALIZE_PASS_BEGIN(FunctionTargetTransformInfo, "function_tti", ftti_name, false, true)
+INITIALIZE_AG_DEPENDENCY(TargetTransformInfo)
+INITIALIZE_PASS_END(FunctionTargetTransformInfo, "function_tti", ftti_name, false, true)
+char FunctionTargetTransformInfo::ID = 0;
+
+namespace llvm {
+FunctionPass *createFunctionTargetTransformInfoPass() {
+  return new FunctionTargetTransformInfo();
+}
+}
+
+FunctionTargetTransformInfo::FunctionTargetTransformInfo()
+  : FunctionPass(ID), Fn(nullptr), TTI(nullptr) {
+  initializeFunctionTargetTransformInfoPass(*PassRegistry::getPassRegistry());
+}
+
+void FunctionTargetTransformInfo::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+  AU.addRequired<TargetTransformInfo>();
+}
+
+void FunctionTargetTransformInfo::releaseMemory() {}
+
+bool FunctionTargetTransformInfo::runOnFunction(Function &F) {
+  Fn = &F;
+  TTI = &getAnalysis<TargetTransformInfo>();
+  return false;
+}
-- 
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