//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Devang Patel 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.
//
//===----------------------------------------------------------------------===//
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "basicinliner"
-
#include "llvm/Module.h"
#include "llvm/Function.h"
#include "llvm/Transforms/Utils/BasicInliner.h"
#include "llvm/Support/CallSite.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallPtrSet.h"
#include <vector>
using namespace llvm;
-namespace {
- cl::opt<unsigned>
- BasicInlineThreshold("inline-threshold", cl::Hidden, cl::init(200),
- cl::desc("Control the amount of basic inlining to perform (default = 200)"));
-}
+static cl::opt<unsigned>
+BasicInlineThreshold("basic-inline-threshold", cl::Hidden, cl::init(200),
+ cl::desc("Control the amount of basic inlining to perform (default = 200)"));
namespace llvm {
}
}
- DOUT << ": " << CallSites.size() << " call sites.\n";
+ DEBUG(errs() << ": " << CallSites.size() << " call sites.\n");
// Inline call sites.
bool Changed = false;
do {
Changed = false;
- for (unsigned index = 0; index != CallSites.size() && !CallSites.empty(); ++index) {
+ for (unsigned index = 0; index != CallSites.size() && !CallSites.empty();
+ ++index) {
CallSite CS = CallSites[index];
if (Function *Callee = CS.getCalledFunction()) {
- // Eliminate calls taht are never inlinable.
+ // Eliminate calls that are never inlinable.
if (Callee->isDeclaration() ||
CS.getInstruction()->getParent()->getParent() == Callee) {
CallSites.erase(CallSites.begin() + index);
- --index;
- continue;
+ --index;
+ continue;
}
- int InlineCost = CA.getInlineCost(CS, NeverInline);
- if (InlineCost >= (int) BasicInlineThreshold) {
- DOUT << " NOT Inlining: cost = " << InlineCost
- << ", call: " << *CS.getInstruction();
- continue;
+ InlineCost IC = CA.getInlineCost(CS, NeverInline);
+ if (IC.isAlways()) {
+ DEBUG(errs() << " Inlining: cost=always"
+ <<", call: " << *CS.getInstruction());
+ } else if (IC.isNever()) {
+ DEBUG(errs() << " NOT Inlining: cost=never"
+ <<", call: " << *CS.getInstruction());
+ continue;
+ } else {
+ int Cost = IC.getValue();
+
+ if (Cost >= (int) BasicInlineThreshold) {
+ DEBUG(errs() << " NOT Inlining: cost = " << Cost
+ << ", call: " << *CS.getInstruction());
+ continue;
+ } else {
+ DEBUG(errs() << " Inlining: cost = " << Cost
+ << ", call: " << *CS.getInstruction());
+ }
}
- DOUT << " Inlining: cost=" << InlineCost
- <<", call: " << *CS.getInstruction();
-
// Inline
if (InlineFunction(CS, NULL, TD)) {
- if (Callee->use_empty() && Callee->hasInternalLinkage())
- DeadFunctions.insert(Callee);
+ if (Callee->use_empty() && (Callee->hasLocalLinkage() ||
+ Callee->hasAvailableExternallyLinkage()))
+ DeadFunctions.insert(Callee);
Changed = true;
CallSites.erase(CallSites.begin() + index);
--index;