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Added support for register allocators to record which intervals are spill intervals, and where the uses and defs of the original intervals were in the original code.

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Spill intervals can be hidden using the "-rmf-intervals=virt-nospills*" option.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112811 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2010-09-02 08:27:00 +00:00
parent fc6e29d4ab
commit 33198391d6
3 changed files with 215 additions and 105 deletions
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5
lib/CodeGen/RegAllocPBQP.cpp
View File

@ -140,6 +140,7 @@ namespace {
const TargetInstrInfo *tii;
const MachineLoopInfo *loopInfo;
MachineRegisterInfo *mri;
RenderMachineFunction *rmf;
LiveIntervals *lis;
LiveStacks *lss;
@ -761,9 +762,11 @@ bool PBQPRegAlloc::mapPBQPToRegAlloc(const PBQP::Solution &solution) {
const LiveInterval *spillInterval = node2LI[node];
double oldSpillWeight = spillInterval->weight;
SmallVector<LiveInterval*, 8> spillIs;
rmf->rememberUseDefs(spillInterval);
std::vector<LiveInterval*> newSpills =
lis->addIntervalsForSpills(*spillInterval, spillIs, loopInfo, *vrm);
addStackInterval(spillInterval, mri);
rmf->rememberSpills(spillInterval, newSpills);
(void) oldSpillWeight;
DEBUG(dbgs() << "VREG " << virtReg << " -> SPILLED (Cost: "
@ -871,7 +874,7 @@ bool PBQPRegAlloc::runOnMachineFunction(MachineFunction &MF) {
lis = &getAnalysis<LiveIntervals>();
lss = &getAnalysis<LiveStacks>();
loopInfo = &getAnalysis<MachineLoopInfo>();
RenderMachineFunction *rmf = &getAnalysis<RenderMachineFunction>();
rmf = &getAnalysis<RenderMachineFunction>();
vrm = &getAnalysis<VirtRegMap>();

103
lib/CodeGen/RenderMachineFunction.cpp
View File

@ -56,6 +56,11 @@ showIntervals("rmf-intervals",
cl::desc("Live intervals to show alongside code."),
cl::init(""), cl::Hidden);
static cl::opt<bool>
filterEmpty("rmf-filter-empty-intervals",
cl::desc("Don't display empty intervals."),
cl::init(true), cl::Hidden);
static cl::opt<bool>
showEmptyIndexes("rmf-empty-indexes",
cl::desc("Render indexes not associated with instructions or "
@ -150,10 +155,14 @@ namespace llvm {
const std::string &intervalRangeStr) {
if (intervalRangeStr == "*") {
intervalTypesToRender |= All;
} else if (intervalRangeStr == "virt-nospills*") {
intervalTypesToRender |= VirtNoSpills;
} else if (intervalRangeStr == "spills*") {
intervalTypesToRender |= VirtSpills;
} else if (intervalRangeStr == "virt*") {
intervalTypesToRender |= VirtPlusExplicit;
intervalTypesToRender |= AllVirt;
} else if (intervalRangeStr == "phys*") {
intervalTypesToRender |= PhysPlusExplicit;
intervalTypesToRender |= AllPhys;
} else {
std::istringstream iss(intervalRangeStr);
unsigned reg1, reg2;
@ -179,10 +188,12 @@ namespace llvm {
void MFRenderingOptions::setup(MachineFunction *mf,
const TargetRegisterInfo *tri,
LiveIntervals *lis) {
LiveIntervals *lis,
const RenderMachineFunction *rmf) {
this->mf = mf;
this->tri = tri;
this->lis = lis;
this->rmf = rmf;
clear();
}
@ -252,12 +263,19 @@ namespace llvm {
if (intervalTypesToRender != ExplicitOnly) {
for (LiveIntervals::iterator liItr = lis->begin(), liEnd = lis->end();
liItr != liEnd; ++liItr) {
LiveInterval *li = liItr->second;
if ((TargetRegisterInfo::isPhysicalRegister(liItr->first) &&
(intervalTypesToRender & PhysPlusExplicit)) ||
(TargetRegisterInfo::isVirtualRegister(liItr->first) &&
(intervalTypesToRender & VirtPlusExplicit))) {
intervalSet.insert(liItr->second);
if (filterEmpty && li->empty())
continue;
if ((TargetRegisterInfo::isPhysicalRegister(li->reg) &&
(intervalTypesToRender & AllPhys))) {
intervalSet.insert(li);
} else if (TargetRegisterInfo::isVirtualRegister(li->reg)) {
if (((intervalTypesToRender & VirtNoSpills) && !rmf->isSpill(li)) ||
((intervalTypesToRender & VirtSpills) && rmf->isSpill(li))) {
intervalSet.insert(li);
}
}
}
}
@ -542,7 +560,26 @@ namespace llvm {
SlotIndex i) const {
const MachineInstr *mi = sis->getInstructionFromIndex(i);
// For uses/defs recorded use/def indexes override current liveness and
// instruction operands (Only for the interval which records the indexes).
if (i.isUse() || i.isDef()) {
UseDefs::const_iterator udItr = useDefs.find(li);
if (udItr != useDefs.end()) {
const SlotSet &slotSet = udItr->second;
if (slotSet.count(i)) {
if (i.isUse()) {
return Used;
}
// else
return Defined;
}
}
}
// If the slot is a load/store, or there's no info in the use/def set then
// use liveness and instruction operand info.
if (li->liveAt(i)) {
if (mi == 0) {
if (vrm == 0 ||
(vrm->getStackSlot(li->reg) == VirtRegMap::NO_STACK_SLOT)) {
@ -880,6 +917,7 @@ namespace llvm {
}
bool RenderMachineFunction::runOnMachineFunction(MachineFunction &fn) {
mf = &fn;
mri = &mf->getRegInfo();
tri = mf->getTarget().getRegisterInfo();
@ -887,7 +925,10 @@ namespace llvm {
sis = &getAnalysis<SlotIndexes>();
trei.setup(mf, mri, tri, lis);
ro.setup(mf, tri, lis);
ro.setup(mf, tri, lis, this);
spillIntervals.clear();
spillFor.clear();
useDefs.clear();
fqn = mf->getFunction()->getParent()->getModuleIdentifier() + "." +
mf->getFunction()->getName().str();
@ -898,6 +939,50 @@ namespace llvm {
void RenderMachineFunction::releaseMemory() {
trei.clear();
ro.clear();
spillIntervals.clear();
spillFor.clear();
useDefs.clear();
}
void RenderMachineFunction::rememberUseDefs(const LiveInterval *li) {
if (!ro.shouldRenderCurrentMachineFunction())
return;
for (MachineRegisterInfo::reg_iterator rItr = mri->reg_begin(li->reg),
rEnd = mri->reg_end();
rItr != rEnd; ++rItr) {
const MachineInstr *mi = &*rItr;
if (mi->readsRegister(li->reg)) {
useDefs[li].insert(lis->getInstructionIndex(mi).getUseIndex());
}
if (mi->definesRegister(li->reg)) {
useDefs[li].insert(lis->getInstructionIndex(mi).getDefIndex());
}
}
}
void RenderMachineFunction::rememberSpills(
const LiveInterval *li,
const std::vector<LiveInterval*> &spills) {
if (!ro.shouldRenderCurrentMachineFunction())
return;
for (std::vector<LiveInterval*>::const_iterator siItr = spills.begin(),
siEnd = spills.end();
siItr != siEnd; ++siItr) {
const LiveInterval *spill = *siItr;
spillIntervals[li].insert(spill);
spillFor[spill] = li;
}
}
bool RenderMachineFunction::isSpill(const LiveInterval *li) const {
SpillForMap::const_iterator sfItr = spillFor.find(li);
if (sfItr == spillFor.end())
return false;
return true;
}
void RenderMachineFunction::renderMachineFunction(

212
lib/CodeGen/RenderMachineFunction.h
View File

@ -28,11 +28,108 @@ namespace llvm {
class LiveIntervals;
class MachineInstr;
class MachineRegisterInfo;
class RenderMachineFunction;
class TargetRegisterClass;
class TargetRegisterInfo;
class VirtRegMap;
class raw_ostream;
/// \brief Helper class to process rendering options. Tries to be as lazy as
/// possible.
class MFRenderingOptions {
public:
struct RegClassComp {
bool operator()(const TargetRegisterClass *trc1,
const TargetRegisterClass *trc2) const {
std::string trc1Name(trc1->getName()), trc2Name(trc2->getName());
return std::lexicographical_compare(trc1Name.begin(), trc1Name.end(),
trc2Name.begin(), trc2Name.end());
}
};
typedef std::set<const TargetRegisterClass*, RegClassComp> RegClassSet;
struct IntervalComp {
bool operator()(const LiveInterval *li1, const LiveInterval *li2) const {
return li1->reg < li2->reg;
}
};
typedef std::set<const LiveInterval*, IntervalComp> IntervalSet;
/// Initialise the rendering options.
void setup(MachineFunction *mf, const TargetRegisterInfo *tri,
LiveIntervals *lis, const RenderMachineFunction *rmf);
/// Clear translations of options to the current function.
void clear();
/// Reset any options computed for this specific rendering.
void resetRenderSpecificOptions();
/// Should we render the current function.
bool shouldRenderCurrentMachineFunction() const;
/// Return the set of register classes to render pressure for.
const RegClassSet& regClasses() const;
/// Return the set of live intervals to render liveness for.
const IntervalSet& intervals() const;
/// Render indexes which are not associated with instructions / MBB starts.
bool renderEmptyIndexes() const;
/// Return whether or not to render using SVG for fancy vertical text.
bool fancyVerticals() const;
private:
static bool renderingOptionsProcessed;
static std::set<std::string> mfNamesToRender;
static bool renderAllMFs;
static std::set<std::string> classNamesToRender;
static bool renderAllClasses;
static std::set<std::pair<unsigned, unsigned> > intervalNumsToRender;
typedef enum { ExplicitOnly = 0,
AllPhys = 1,
VirtNoSpills = 2,
VirtSpills = 4,
AllVirt = 6,
All = 7 }
IntervalTypesToRender;
static unsigned intervalTypesToRender;
template <typename OutputItr>
static void splitComaSeperatedList(const std::string &s, OutputItr outItr);
static void processOptions();
static void processFuncNames();
static void processRegClassNames();
static void processIntervalNumbers();
static void processIntervalRange(const std::string &intervalRangeStr);
MachineFunction *mf;
const TargetRegisterInfo *tri;
LiveIntervals *lis;
const RenderMachineFunction *rmf;
mutable bool regClassesTranslatedToCurrentFunction;
mutable RegClassSet regClassSet;
mutable bool intervalsTranslatedToCurrentFunction;
mutable IntervalSet intervalSet;
void translateRegClassNamesToCurrentFunction() const;
void translateIntervalNumbersToCurrentFunction() const;
};
/// \brief Provide extra information about the physical and virtual registers
/// in the function being compiled.
class TargetRegisterExtraInfo {
@ -99,99 +196,6 @@ namespace llvm {
void resetPressureAndLiveStates();
};
/// \brief Helper class to process rendering options. Tries to be as lazy as
/// possible.
class MFRenderingOptions {
public:
struct RegClassComp {
bool operator()(const TargetRegisterClass *trc1,
const TargetRegisterClass *trc2) const {
std::string trc1Name(trc1->getName()), trc2Name(trc2->getName());
return std::lexicographical_compare(trc1Name.begin(), trc1Name.end(),
trc2Name.begin(), trc2Name.end());
}
};
typedef std::set<const TargetRegisterClass*, RegClassComp> RegClassSet;
struct IntervalComp {
bool operator()(const LiveInterval *li1, const LiveInterval *li2) const {
return li1->reg < li2->reg;
}
};
typedef std::set<const LiveInterval*, IntervalComp> IntervalSet;
/// Initialise the rendering options.
void setup(MachineFunction *mf, const TargetRegisterInfo *tri,
LiveIntervals *lis);
/// Clear translations of options to the current function.
void clear();
/// Reset any options computed for this specific rendering.
void resetRenderSpecificOptions();
/// Should we render the current function.
bool shouldRenderCurrentMachineFunction() const;
/// Return the set of register classes to render pressure for.
const RegClassSet& regClasses() const;
/// Return the set of live intervals to render liveness for.
const IntervalSet& intervals() const;
/// Render indexes which are not associated with instructions / MBB starts.
bool renderEmptyIndexes() const;
/// Return whether or not to render using SVG for fancy vertical text.
bool fancyVerticals() const;
private:
static bool renderingOptionsProcessed;
static std::set<std::string> mfNamesToRender;
static bool renderAllMFs;
static std::set<std::string> classNamesToRender;
static bool renderAllClasses;
static std::set<std::pair<unsigned, unsigned> > intervalNumsToRender;
typedef enum { ExplicitOnly = 0,
VirtPlusExplicit = 1,
PhysPlusExplicit = 2,
All = 3 }
IntervalTypesToRender;
static unsigned intervalTypesToRender;
template <typename OutputItr>
static void splitComaSeperatedList(const std::string &s, OutputItr outItr);
static void processOptions();
static void processFuncNames();
static void processRegClassNames();
static void processIntervalNumbers();
static void processIntervalRange(const std::string &intervalRangeStr);
MachineFunction *mf;
const TargetRegisterInfo *tri;
LiveIntervals *lis;
mutable bool regClassesTranslatedToCurrentFunction;
mutable RegClassSet regClassSet;
mutable bool intervalsTranslatedToCurrentFunction;
mutable IntervalSet intervalSet;
void translateRegClassNamesToCurrentFunction() const;
void translateIntervalNumbersToCurrentFunction() const;
};
/// \brief Render MachineFunction objects and related information to a HTML
/// page.
class RenderMachineFunction : public MachineFunctionPass {
@ -206,6 +210,13 @@ namespace llvm {
virtual void releaseMemory();
void rememberUseDefs(const LiveInterval *li);
void rememberSpills(const LiveInterval *li,
const std::vector<LiveInterval*> &spills);
bool isSpill(const LiveInterval *li) const;
/// \brief Render this machine function to HTML.
///
/// @param renderContextStr This parameter will be included in the top of
@ -225,10 +236,8 @@ namespace llvm {
private:
class Spacer;
friend raw_ostream& operator<<(raw_ostream &os, const Spacer &s);
std::string fqn;
MachineFunction *mf;
@ -241,6 +250,8 @@ namespace llvm {
TargetRegisterExtraInfo trei;
MFRenderingOptions ro;
// Utilities.
typedef enum { Dead, Defined, Used, AliveReg, AliveStack } LiveState;
LiveState getLiveStateAt(const LiveInterval *li, SlotIndex i) const;
@ -249,6 +260,17 @@ namespace llvm {
PressureState getPressureStateAt(const TargetRegisterClass *trc,
SlotIndex i) const;
typedef std::map<const LiveInterval*, std::set<const LiveInterval*> >
SpillIntervals;
SpillIntervals spillIntervals;
typedef std::map<const LiveInterval*, const LiveInterval*> SpillForMap;
SpillForMap spillFor;
typedef std::set<SlotIndex> SlotSet;
typedef std::map<const LiveInterval*, SlotSet> UseDefs;
UseDefs useDefs;
// ---------- Rendering methods ----------
/// For inserting spaces when pretty printing.