Refactor inline costs analysis by removing the InlineCostAnalysis class

[oota-llvm.git] / lib / Transforms / IPO / InlineSimple.cpp

diff --git a/lib/Transforms/IPO/InlineSimple.cpp b/lib/Transforms/IPO/InlineSimple.cpp
index eea28a745c57902a637e9fe7b92c20312da8222f..45609f891ed87368f65f56c2b5509cefece65195 100644 (file)
--- a/lib/Transforms/IPO/InlineSimple.cpp
+++ b/lib/Transforms/IPO/InlineSimple.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -11,73 +11,100 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "inline"
-#include "llvm/CallingConv.h"
-#include "llvm/Instructions.h"
-#include "llvm/IntrinsicInst.h"
-#include "llvm/Module.h"
-#include "llvm/Type.h"
+#include "llvm/Analysis/AssumptionCache.h"
 #include "llvm/Analysis/CallGraph.h"
-#include "llvm/Support/CallSite.h"
-#include "llvm/Support/Compiler.h"
+#include "llvm/Analysis/InlineCost.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/IR/CallSite.h"
+#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
 #include "llvm/Transforms/IPO.h"
 #include "llvm/Transforms/IPO/InlinerPass.h"
-#include "llvm/Transforms/Utils/InlineCost.h"
-#include <set>
 
 using namespace llvm;
 
+#define DEBUG_TYPE "inline"
+
 namespace {
 
-  class VISIBILITY_HIDDEN SimpleInliner : public Inliner {
-    std::set<const Function*> NeverInline; // Functions that are never inlined
-    InlineCostAnalyzer CA;
-  public:
-    SimpleInliner() : Inliner(&ID) {}
-    static char ID; // Pass identification, replacement for typeid
-    int getInlineCost(CallSite CS) {
-      return CA.getInlineCost(CS, NeverInline);
-    }
-    virtual bool doInitialization(CallGraph &CG);
-  };
-  char SimpleInliner::ID = 0;
-  RegisterPass<SimpleInliner> X("inline", "Function Integration/Inlining");
+/// \brief Actual inliner pass implementation.
+///
+/// The common implementation of the inlining logic is shared between this
+/// inliner pass and the always inliner pass. The two passes use different cost
+/// analyses to determine when to inline.
+class SimpleInliner : public Inliner {
+
+public:
+  SimpleInliner() : Inliner(ID) {
+    initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
+  }
+
+  SimpleInliner(int Threshold)
+      : Inliner(ID, Threshold, /*InsertLifetime*/ true) {
+    initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
+  }
+
+  static char ID; // Pass identification, replacement for typeid
+
+  InlineCost getInlineCost(CallSite CS) override {
+    Function *Callee = CS.getCalledFunction();
+    TargetTransformInfo &TTI = TTIWP->getTTI(*Callee);
+    return llvm::getInlineCost(CS, getInlineThreshold(CS), TTI, ACT);
+  }
+
+  bool runOnSCC(CallGraphSCC &SCC) override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+
+private:
+  TargetTransformInfoWrapperPass *TTIWP;
+};
+
+static int computeThresholdFromOptLevels(unsigned OptLevel,
+                                         unsigned SizeOptLevel) {
+  if (OptLevel > 2)
+    return 275;
+  if (SizeOptLevel == 1) // -Os
+    return 75;
+  if (SizeOptLevel == 2) // -Oz
+    return 25;
+  return 225;
 }
 
+} // end anonymous namespace
+
+char SimpleInliner::ID = 0;
+INITIALIZE_PASS_BEGIN(SimpleInliner, "inline",
+                "Function Integration/Inlining", false, false)
+INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
+INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass)
+INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
+INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
+INITIALIZE_PASS_END(SimpleInliner, "inline",
+                "Function Integration/Inlining", false, false)
+
 Pass *llvm::createFunctionInliningPass() { return new SimpleInliner(); }
 
-// doInitialization - Initializes the vector of functions that have been
-// annotated with the noinline attribute.
-bool SimpleInliner::doInitialization(CallGraph &CG) {
-  
-  Module &M = CG.getModule();
-  
-  // Get llvm.noinline
-  GlobalVariable *GV = M.getNamedGlobal("llvm.noinline");
-  
-  if (GV == 0)
-    return false;
-
-  const ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
-  
-  if (InitList == 0)
-    return false;
-
-  // Iterate over each element and add to the NeverInline set
-  for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
-        
-    // Get Source
-    const Constant *Elt = InitList->getOperand(i);
-        
-    if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(Elt))
-      if (CE->getOpcode() == Instruction::BitCast) 
-        Elt = CE->getOperand(0);
-    
-    // Insert into set of functions to never inline
-    if (const Function *F = dyn_cast<Function>(Elt))
-      NeverInline.insert(F);
-  }
-  
-  return false;
+Pass *llvm::createFunctionInliningPass(int Threshold) {
+  return new SimpleInliner(Threshold);
 }
 
+Pass *llvm::createFunctionInliningPass(unsigned OptLevel,
+                                       unsigned SizeOptLevel) {
+  return new SimpleInliner(
+      computeThresholdFromOptLevels(OptLevel, SizeOptLevel));
+}
+
+bool SimpleInliner::runOnSCC(CallGraphSCC &SCC) {
+  TTIWP = &getAnalysis<TargetTransformInfoWrapperPass>();
+  return Inliner::runOnSCC(SCC);
+}
+
+void SimpleInliner::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.addRequired<TargetTransformInfoWrapperPass>();
+  Inliner::getAnalysisUsage(AU);
+}