-//====----- MachineBlockFrequencyInfo.cpp - Machine Block Frequency Analysis ----====//
+//===- MachineBlockFrequencyInfo.cpp - MBB Frequency Analysis -------------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
-#include "llvm/Analysis/BlockFrequencyImpl.h"
+#include "llvm/Analysis/BlockFrequencyInfoImpl.h"
#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
+#define DEBUG_TYPE "block-freq"
+
#ifndef NDEBUG
enum GVDAGType {
GVDT_None,
ViewMachineBlockFreqPropagationDAG("view-machine-block-freq-propagation-dags",
cl::Hidden,
cl::desc("Pop up a window to show a dag displaying how machine block "
- "frequencies propgate through the CFG."),
+ "frequencies propagate through the CFG."),
cl::values(
clEnumValN(GVDT_None, "none",
"do not display graphs."),
typedef MachineBasicBlock::const_succ_iterator ChildIteratorType;
typedef MachineFunction::const_iterator nodes_iterator;
- static inline const NodeType *getEntryNode(const MachineBlockFrequencyInfo *G) {
+ static inline
+ const NodeType *getEntryNode(const MachineBlockFrequencyInfo *G) {
return G->getFunction()->begin();
}
+
static ChildIteratorType child_begin(const NodeType *N) {
return N->succ_begin();
}
+
static ChildIteratorType child_end(const NodeType *N) {
return N->succ_end();
}
+
static nodes_iterator nodes_begin(const MachineBlockFrequencyInfo *G) {
return G->getFunction()->begin();
}
+
static nodes_iterator nodes_end(const MachineBlockFrequencyInfo *G) {
return G->getFunction()->end();
}
};
template<>
-struct DOTGraphTraits<MachineBlockFrequencyInfo*> : public DefaultDOTGraphTraits {
+struct DOTGraphTraits<MachineBlockFrequencyInfo*> :
+ public DefaultDOTGraphTraits {
explicit DOTGraphTraits(bool isSimple=false) :
DefaultDOTGraphTraits(isSimple) {}
OS << Node->getName().str() << ":";
switch (ViewMachineBlockFreqPropagationDAG) {
case GVDT_Fraction:
- Graph->getBlockFreq(Node).print(OS);
+ Graph->printBlockFreq(OS, Node);
break;
case GVDT_Integer:
OS << Graph->getBlockFreq(Node).getFrequency();
INITIALIZE_PASS_BEGIN(MachineBlockFrequencyInfo, "machine-block-freq",
"Machine Block Frequency Analysis", true, true)
INITIALIZE_PASS_DEPENDENCY(MachineBranchProbabilityInfo)
+INITIALIZE_PASS_DEPENDENCY(MachineLoopInfo)
INITIALIZE_PASS_END(MachineBlockFrequencyInfo, "machine-block-freq",
"Machine Block Frequency Analysis", true, true)
char MachineBlockFrequencyInfo::ID = 0;
-MachineBlockFrequencyInfo::MachineBlockFrequencyInfo() : MachineFunctionPass(ID) {
+MachineBlockFrequencyInfo::
+MachineBlockFrequencyInfo() :MachineFunctionPass(ID) {
initializeMachineBlockFrequencyInfoPass(*PassRegistry::getPassRegistry());
- MBFI = new BlockFrequencyImpl<MachineBasicBlock, MachineFunction,
- MachineBranchProbabilityInfo>();
}
-MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() {
- delete MBFI;
-}
+MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() {}
void MachineBlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<MachineBranchProbabilityInfo>();
+ AU.addRequired<MachineLoopInfo>();
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
}
bool MachineBlockFrequencyInfo::runOnMachineFunction(MachineFunction &F) {
- MachineBranchProbabilityInfo &MBPI = getAnalysis<MachineBranchProbabilityInfo>();
- MBFI->doFunction(&F, &MBPI);
+ MachineBranchProbabilityInfo &MBPI =
+ getAnalysis<MachineBranchProbabilityInfo>();
+ MachineLoopInfo &MLI = getAnalysis<MachineLoopInfo>();
+ if (!MBFI)
+ MBFI.reset(new ImplType);
+ MBFI->doFunction(&F, &MBPI, &MLI);
#ifndef NDEBUG
if (ViewMachineBlockFreqPropagationDAG != GVDT_None) {
view();
return false;
}
+void MachineBlockFrequencyInfo::releaseMemory() { MBFI.reset(); }
+
/// Pop up a ghostview window with the current block frequency propagation
/// rendered using dot.
void MachineBlockFrequencyInfo::view() const {
ViewGraph(const_cast<MachineBlockFrequencyInfo *>(this),
"MachineBlockFrequencyDAGs");
#else
- errs() << "BlockFrequencyInfo::view is only available in debug builds on "
- "systems with Graphviz or gv!\n";
+ errs() << "MachineBlockFrequencyInfo::view is only available in debug builds "
+ "on systems with Graphviz or gv!\n";
#endif // NDEBUG
}
BlockFrequency MachineBlockFrequencyInfo::
getBlockFreq(const MachineBasicBlock *MBB) const {
- return MBFI->getBlockFreq(MBB);
+ return MBFI ? MBFI->getBlockFreq(MBB) : 0;
+}
+
+const MachineFunction *MachineBlockFrequencyInfo::getFunction() const {
+ return MBFI ? MBFI->getFunction() : nullptr;
}
-MachineFunction *MachineBlockFrequencyInfo::getFunction() const {
- return MBFI->Fn;
+raw_ostream &
+MachineBlockFrequencyInfo::printBlockFreq(raw_ostream &OS,
+ const BlockFrequency Freq) const {
+ return MBFI ? MBFI->printBlockFreq(OS, Freq) : OS;
}
+raw_ostream &
+MachineBlockFrequencyInfo::printBlockFreq(raw_ostream &OS,
+ const MachineBasicBlock *MBB) const {
+ return MBFI ? MBFI->printBlockFreq(OS, MBB) : OS;
+}
+
+uint64_t MachineBlockFrequencyInfo::getEntryFreq() const {
+ return MBFI ? MBFI->getEntryFreq() : 0;
+}