src/llvm/lib/Analysis/FunctionTargetTransformInfo.cpp

   1 //===- llvm/Analysis/FunctionTargetTransformInfo.h --------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This pass wraps a TargetTransformInfo in a FunctionPass so that it can
  11 // forward along the current Function so that we can make target specific
  12 // decisions based on the particular subtarget specified for each Function.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "llvm/InitializePasses.h"
  17 #include "llvm/Analysis/FunctionTargetTransformInfo.h"
  18
  19 using namespace llvm;
  20
  21 #define DEBUG_TYPE "function-tti"
  22 static const char ftti_name[] = "Function TargetTransformInfo";
  23 INITIALIZE_PASS_BEGIN(FunctionTargetTransformInfo, "function_tti", ftti_name, false, true)
  24 INITIALIZE_AG_DEPENDENCY(TargetTransformInfo)
  25 INITIALIZE_PASS_END(FunctionTargetTransformInfo, "function_tti", ftti_name, false, true)
  26 char FunctionTargetTransformInfo::ID = 0;
  27
  28 namespace llvm {
  29 FunctionPass *createFunctionTargetTransformInfoPass() {
  30   return new FunctionTargetTransformInfo();
  31 }
  32 }
  33
  34 FunctionTargetTransformInfo::FunctionTargetTransformInfo()
  35   : FunctionPass(ID), Fn(nullptr), TTI(nullptr) {
  36   initializeFunctionTargetTransformInfoPass(*PassRegistry::getPassRegistry());
  37 }
  38
  39 void FunctionTargetTransformInfo::getAnalysisUsage(AnalysisUsage &AU) const {
  40   AU.setPreservesAll();
  41   AU.addRequired<TargetTransformInfo>();
  42 }
  43
  44 void FunctionTargetTransformInfo::releaseMemory() {}
  45
  46 bool FunctionTargetTransformInfo::runOnFunction(Function &F) {
  47   Fn = &F;
  48   TTI = &getAnalysis<TargetTransformInfo>();
  49   return false;
  50 }