55 cl::desc(
"Percentile profile summary cutoff used to "
56 "determine cold blocks. Unused if set to zero."),
60 "mfs-count-threshold",
62 "Minimum number of times a block must be executed to be retained."),
67 cl::desc(
"Splits all EH code and it's descendants by default."),
80 return "Machine Function Splitter Transformation";
95 for (
auto Block : EHBlocks) {
102 return X.getSectionID().Type <
Y.getSectionID().Type;
115 if (!
TII.isMBBSafeToSplitToCold(
MBB))
137bool MachineFunctionSplitter::runOnMachineFunction(
MachineFunction &MF) {
146 if (!
TII.isFunctionSafeToSplit(MF))
158 if (UseProfileData) {
159 MBFI = &getAnalysis<MachineBlockFrequencyInfo>();
160 PSI = &getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI();
175 for (
auto &
MBB : MF) {
191 bool HasHotLandingPads =
false;
194 HasHotLandingPads =
true;
196 if (!HasHotLandingPads) {
206void MachineFunctionSplitter::getAnalysisUsage(
AnalysisUsage &AU)
const {
212char MachineFunctionSplitter::ID = 0;
214 "Split machine functions using profile information",
false,
218 return new MachineFunctionSplitter();
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
const HexagonInstrInfo * TII
static bool isColdBlock(const MachineBasicBlock &MBB, const MachineBlockFrequencyInfo *MBFI, ProfileSummaryInfo *PSI)
static void finishAdjustingBasicBlocksAndLandingPads(MachineFunction &MF)
static cl::opt< unsigned > ColdCountThreshold("mfs-count-threshold", cl::desc("Minimum number of times a block must be executed to be retained."), cl::init(1), cl::Hidden)
static void setDescendantEHBlocksCold(MachineFunction &MF)
setDescendantEHBlocksCold - This splits all EH pads and blocks reachable only by EH pad as cold.
static cl::opt< unsigned > PercentileCutoff("mfs-psi-cutoff", cl::desc("Percentile profile summary cutoff used to " "determine cold blocks. Unused if set to zero."), cl::init(999950), cl::Hidden)
static cl::opt< bool > SplitAllEHCode("mfs-split-ehcode", cl::desc("Splits all EH code and it's descendants by default."), cl::init(false), cl::Hidden)
static GCMetadataPrinterRegistry::Add< OcamlGCMetadataPrinter > Y("ocaml", "ocaml 3.10-compatible collector")
#define INITIALIZE_PASS(passName, arg, name, cfg, analysis)
This file defines the SmallVector class.
Represent the analysis usage information of a pass.
AnalysisUsage & addRequired()
Implements a dense probed hash-table based set.
bool hasProfileData(bool IncludeSynthetic=false) const
Return true if the function is annotated with profile data.
bool isEHPad() const
Returns true if the block is a landing pad.
bool isEntryBlock() const
Returns true if this is the entry block of the function.
void setSectionID(MBBSectionID V)
Sets the section ID for this basic block.
const MachineFunction * getParent() const
Return the MachineFunction containing this basic block.
MachineBlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate machine basic b...
std::optional< uint64_t > getBlockProfileCount(const MachineBasicBlock *MBB) const
MachineFunctionPass - This class adapts the FunctionPass interface to allow convenient creation of pa...
void getAnalysisUsage(AnalysisUsage &AU) const override
getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.
virtual bool runOnMachineFunction(MachineFunction &MF)=0
runOnMachineFunction - This method must be overloaded to perform the desired machine code transformat...
void setBBSectionsType(BasicBlockSection V)
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
Function & getFunction()
Return the LLVM function that this machine code represents.
void RenumberBlocks(MachineBasicBlock *MBBFrom=nullptr)
RenumberBlocks - This discards all of the MachineBasicBlock numbers and recomputes them.
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
virtual StringRef getPassName() const
getPassName - Return a nice clean name for a pass.
An analysis pass based on legacy pass manager to deliver ProfileSummaryInfo.
Analysis providing profile information.
bool hasCSInstrumentationProfile() const
Returns true if module M has context sensitive instrumentation profile.
bool hasInstrumentationProfile() const
Returns true if module M has instrumentation profile.
bool hasSampleProfile() const
Returns true if module M has sample profile.
bool isColdCountNthPercentile(int PercentileCutoff, uint64_t C) const
Returns true if count C is considered cold with regard to a given cold percentile cutoff value.
bool isFunctionHotInCallGraph(const FuncT *F, BFIT &BFI) const
Returns true if F contains hot code.
void push_back(const T &Elt)
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
StringRef - Represent a constant reference to a string, i.e.
TargetInstrInfo - Interface to description of machine instruction set.
virtual const TargetInstrInfo * getInstrInfo() const
unsigned ID
LLVM IR allows to use arbitrary numbers as calling convention identifiers.
initializer< Ty > init(const Ty &Val)
This is an optimization pass for GlobalISel generic memory operations.
void initializeMachineFunctionSplitterPass(PassRegistry &)
static void computeEHOnlyBlocks(FunctionT &F, DenseSet< BlockT * > &EHBlocks)
Compute a list of blocks that are only reachable via EH paths.
MachineFunctionPass * createMachineFunctionSplitterPass()
createMachineFunctionSplitterPass - This pass splits machine functions using profile information.
void avoidZeroOffsetLandingPad(MachineFunction &MF)
void sortBasicBlocksAndUpdateBranches(MachineFunction &MF, MachineBasicBlockComparator MBBCmp)
static const MBBSectionID ColdSectionID