//
// 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.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
-#include "Inliner.h"
+#define DEBUG_TYPE "inline"
#include "llvm/Module.h"
#include "llvm/Instructions.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Support/CallSite.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Transforms/IPO/InlinerPass.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/ADT/Statistic.h"
-#include <iostream>
#include <set>
using namespace llvm;
+STATISTIC(NumInlined, "Number of functions inlined");
+STATISTIC(NumDeleted, "Number of functions deleted because all callers found");
+
namespace {
- Statistic<> NumInlined("inline", "Number of functions inlined");
- Statistic<> NumDeleted("inline",
- "Number of functions deleted because all callers found");
- cl::opt<unsigned> // FIXME: 200 is VERY conservative
+ cl::opt<int>
InlineLimit("inline-threshold", cl::Hidden, cl::init(200),
cl::desc("Control the amount of inlining to perform (default = 200)"));
}
-Inliner::Inliner() : InlineThreshold(InlineLimit) {}
+Inliner::Inliner(const void *ID)
+ : CallGraphSCCPass((intptr_t)ID), InlineThreshold(InlineLimit) {}
+
+Inliner::Inliner(const void *ID, int Threshold)
+ : CallGraphSCCPass((intptr_t)ID), InlineThreshold(Threshold) {}
+
+/// getAnalysisUsage - For this class, we declare that we require and preserve
+/// the call graph. If the derived class implements this method, it should
+/// always explicitly call the implementation here.
+void Inliner::getAnalysisUsage(AnalysisUsage &Info) const {
+ Info.addRequired<TargetData>();
+ CallGraphSCCPass::getAnalysisUsage(Info);
+}
// InlineCallIfPossible - If it is possible to inline the specified call site,
// do so and update the CallGraph for this operation.
static bool InlineCallIfPossible(CallSite CS, CallGraph &CG,
- const std::set<Function*> &SCCFunctions) {
+ const std::set<Function*> &SCCFunctions,
+ const TargetData &TD) {
Function *Callee = CS.getCalledFunction();
- if (!InlineFunction(CS, &CG)) return false;
+ if (!InlineFunction(CS, &CG, &TD)) return false;
// If we inlined the last possible call site to the function, delete the
// function body now.
if (Callee->use_empty() && Callee->hasInternalLinkage() &&
!SCCFunctions.count(Callee)) {
- DEBUG(std::cerr << " -> Deleting dead function: "
- << Callee->getName() << "\n");
+ DOUT << " -> Deleting dead function: " << Callee->getName() << "\n";
// Remove any call graph edges from the callee to its callees.
CallGraphNode *CalleeNode = CG[Callee];
- while (CalleeNode->begin() != CalleeNode->end())
+ while (!CalleeNode->empty())
CalleeNode->removeCallEdgeTo((CalleeNode->end()-1)->second);
// Removing the node for callee from the call graph and delete it.
CallGraph &CG = getAnalysis<CallGraph>();
std::set<Function*> SCCFunctions;
- DEBUG(std::cerr << "Inliner visiting SCC:");
+ DOUT << "Inliner visiting SCC:";
for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
Function *F = SCC[i]->getFunction();
if (F) SCCFunctions.insert(F);
- DEBUG(std::cerr << " " << (F ? F->getName() : "INDIRECTNODE"));
+ DOUT << " " << (F ? F->getName() : "INDIRECTNODE");
}
// Scan through and identify all call sites ahead of time so that we only
for (BasicBlock::iterator I = BB->begin(); I != BB->end(); ++I) {
CallSite CS = CallSite::get(I);
if (CS.getInstruction() && (!CS.getCalledFunction() ||
- !CS.getCalledFunction()->isExternal()))
+ !CS.getCalledFunction()->isDeclaration()))
CallSites.push_back(CS);
}
- DEBUG(std::cerr << ": " << CallSites.size() << " call sites.\n");
+ DOUT << ": " << CallSites.size() << " call sites.\n";
// Now that we have all of the call sites, move the ones to functions in the
// current SCC to the end of the list.
for (unsigned CSi = 0; CSi != CallSites.size(); ++CSi)
if (Function *Callee = CallSites[CSi].getCalledFunction()) {
// Calls to external functions are never inlinable.
- if (Callee->isExternal() ||
+ if (Callee->isDeclaration() ||
CallSites[CSi].getInstruction()->getParent()->getParent() ==Callee){
if (SCC.size() == 1) {
std::swap(CallSites[CSi], CallSites.back());
// try to do so.
CallSite CS = CallSites[CSi];
int InlineCost = getInlineCost(CS);
- if (InlineCost >= (int)InlineThreshold) {
- DEBUG(std::cerr << " NOT Inlining: cost=" << InlineCost
- << ", Call: " << *CS.getInstruction());
+ float FudgeFactor = getInlineFudgeFactor(CS);
+
+ if (InlineCost >= (int)(InlineThreshold * FudgeFactor)) {
+ DOUT << " NOT Inlining: cost=" << InlineCost
+ << ", Call: " << *CS.getInstruction();
} else {
- DEBUG(std::cerr << " Inlining: cost=" << InlineCost
- << ", Call: " << *CS.getInstruction());
+ DOUT << " Inlining: cost=" << InlineCost
+ << ", Call: " << *CS.getInstruction();
// Attempt to inline the function...
- if (InlineCallIfPossible(CS, CG, SCCFunctions)) {
+ if (InlineCallIfPossible(CS, CG, SCCFunctions,
+ getAnalysis<TargetData>())) {
// Remove this call site from the list. If possible, use
// swap/pop_back for efficiency, but do not use it if doing so would
// move a call site to a function in this SCC before the
F->use_empty()) {
// Remove any call graph edges from the function to its callees.
- while (CGN->begin() != CGN->end())
+ while (!CGN->empty())
CGN->removeCallEdgeTo((CGN->end()-1)->second);
// Remove any edges from the external node to the function's call graph