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-rw-r--r--include/llvm/CodeGen/SlotIndexes.h208
1 files changed, 73 insertions, 135 deletions
diff --git a/include/llvm/CodeGen/SlotIndexes.h b/include/llvm/CodeGen/SlotIndexes.h
index d868cb8..65ac927 100644
--- a/include/llvm/CodeGen/SlotIndexes.h
+++ b/include/llvm/CodeGen/SlotIndexes.h
@@ -23,6 +23,7 @@
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/ADT/PointerIntPair.h"
+#include "llvm/ADT/ilist.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/Allocator.h"
@@ -33,8 +34,7 @@ namespace llvm {
/// SlotIndexes pass. It should not be used directly. See the
/// SlotIndex & SlotIndexes classes for the public interface to this
/// information.
- class IndexListEntry {
- IndexListEntry *next, *prev;
+ class IndexListEntry : public ilist_node<IndexListEntry> {
MachineInstr *mi;
unsigned index;
@@ -51,23 +51,31 @@ namespace llvm {
void setIndex(unsigned index) {
this->index = index;
}
-
- IndexListEntry* getNext() { return next; }
- const IndexListEntry* getNext() const { return next; }
- void setNext(IndexListEntry *next) {
- this->next = next;
- }
- IndexListEntry* getPrev() { return prev; }
- const IndexListEntry* getPrev() const { return prev; }
- void setPrev(IndexListEntry *prev) {
- this->prev = prev;
+ };
+
+ template <>
+ struct ilist_traits<IndexListEntry> : public ilist_default_traits<IndexListEntry> {
+ private:
+ mutable ilist_half_node<IndexListEntry> Sentinel;
+ public:
+ IndexListEntry *createSentinel() const {
+ return static_cast<IndexListEntry*>(&Sentinel);
}
+ void destroySentinel(IndexListEntry *) const {}
+
+ IndexListEntry *provideInitialHead() const { return createSentinel(); }
+ IndexListEntry *ensureHead(IndexListEntry*) const { return createSentinel(); }
+ static void noteHead(IndexListEntry*, IndexListEntry*) {}
+ void deleteNode(IndexListEntry *N) {}
+
+ private:
+ void createNode(const IndexListEntry &);
};
// Specialize PointerLikeTypeTraits for IndexListEntry.
template <>
- class PointerLikeTypeTraits<IndexListEntry*> {
+ class PointerLikeTypeTraits<IndexListEntry*> {
public:
static inline void* getAsVoidPointer(IndexListEntry *p) {
return p;
@@ -112,13 +120,13 @@ namespace llvm {
SlotIndex(IndexListEntry *entry, unsigned slot)
: lie(entry, slot) {}
- IndexListEntry& entry() const {
+ IndexListEntry* listEntry() const {
assert(isValid() && "Attempt to compare reserved index.");
- return *lie.getPointer();
+ return lie.getPointer();
}
int getIndex() const {
- return entry().getIndex() | getSlot();
+ return listEntry()->getIndex() | getSlot();
}
/// Returns the slot for this SlotIndex.
@@ -150,8 +158,7 @@ namespace llvm {
SlotIndex() : lie(0, 0) {}
// Construct a new slot index from the given one, and set the slot.
- SlotIndex(const SlotIndex &li, Slot s)
- : lie(&li.entry(), unsigned(s)) {
+ SlotIndex(const SlotIndex &li, Slot s) : lie(li.listEntry(), unsigned(s)) {
assert(lie.getPointer() != 0 &&
"Attempt to construct index with 0 pointer.");
}
@@ -179,7 +186,7 @@ namespace llvm {
bool operator!=(SlotIndex other) const {
return lie != other.lie;
}
-
+
/// Compare two SlotIndex objects. Return true if the first index
/// is strictly lower than the second.
bool operator<(SlotIndex other) const {
@@ -211,7 +218,7 @@ namespace llvm {
/// isEarlierInstr - Return true if A refers to an instruction earlier than
/// B. This is equivalent to A < B && !isSameInstr(A, B).
static bool isEarlierInstr(SlotIndex A, SlotIndex B) {
- return A.entry().getIndex() < B.entry().getIndex();
+ return A.listEntry()->getIndex() < B.listEntry()->getIndex();
}
/// Return the distance from this index to the given one.
@@ -236,25 +243,25 @@ namespace llvm {
/// is the one associated with the Slot_Block slot for the instruction
/// pointed to by this index.
SlotIndex getBaseIndex() const {
- return SlotIndex(&entry(), Slot_Block);
+ return SlotIndex(listEntry(), Slot_Block);
}
/// Returns the boundary index for associated with this index. The boundary
/// index is the one associated with the Slot_Block slot for the instruction
/// pointed to by this index.
SlotIndex getBoundaryIndex() const {
- return SlotIndex(&entry(), Slot_Dead);
+ return SlotIndex(listEntry(), Slot_Dead);
}
/// Returns the register use/def slot in the current instruction for a
/// normal or early-clobber def.
SlotIndex getRegSlot(bool EC = false) const {
- return SlotIndex(&entry(), EC ? Slot_EarlyClobber : Slot_Register);
+ return SlotIndex(listEntry(), EC ? Slot_EarlyClobber : Slot_Register);
}
/// Returns the dead def kill slot for the current instruction.
SlotIndex getDeadSlot() const {
- return SlotIndex(&entry(), Slot_Dead);
+ return SlotIndex(listEntry(), Slot_Dead);
}
/// Returns the next slot in the index list. This could be either the
@@ -266,15 +273,15 @@ namespace llvm {
SlotIndex getNextSlot() const {
Slot s = getSlot();
if (s == Slot_Dead) {
- return SlotIndex(entry().getNext(), Slot_Block);
+ return SlotIndex(listEntry()->getNextNode(), Slot_Block);
}
- return SlotIndex(&entry(), s + 1);
+ return SlotIndex(listEntry(), s + 1);
}
/// Returns the next index. This is the index corresponding to the this
/// index's slot, but for the next instruction.
SlotIndex getNextIndex() const {
- return SlotIndex(entry().getNext(), getSlot());
+ return SlotIndex(listEntry()->getNextNode(), getSlot());
}
/// Returns the previous slot in the index list. This could be either the
@@ -286,15 +293,15 @@ namespace llvm {
SlotIndex getPrevSlot() const {
Slot s = getSlot();
if (s == Slot_Block) {
- return SlotIndex(entry().getPrev(), Slot_Dead);
+ return SlotIndex(listEntry()->getPrevNode(), Slot_Dead);
}
- return SlotIndex(&entry(), s - 1);
+ return SlotIndex(listEntry(), s - 1);
}
/// Returns the previous index. This is the index corresponding to this
/// index's slot, but for the previous instruction.
SlotIndex getPrevIndex() const {
- return SlotIndex(entry().getPrev(), getSlot());
+ return SlotIndex(listEntry()->getPrevNode(), getSlot());
}
};
@@ -315,7 +322,7 @@ namespace llvm {
return (LHS == RHS);
}
};
-
+
template <> struct isPodLike<SlotIndex> { static const bool value = true; };
@@ -346,8 +353,10 @@ namespace llvm {
class SlotIndexes : public MachineFunctionPass {
private:
+ typedef ilist<IndexListEntry> IndexList;
+ IndexList indexList;
+
MachineFunction *mf;
- IndexListEntry *indexListHead;
unsigned functionSize;
typedef DenseMap<const MachineInstr*, SlotIndex> Mi2IndexMap;
@@ -374,84 +383,18 @@ namespace llvm {
return entry;
}
- void initList() {
- assert(indexListHead == 0 && "Zero entry non-null at initialisation.");
- indexListHead = createEntry(0, ~0U);
- indexListHead->setNext(0);
- indexListHead->setPrev(indexListHead);
- }
-
- void clearList() {
- indexListHead = 0;
- ileAllocator.Reset();
- }
-
- IndexListEntry* getTail() {
- assert(indexListHead != 0 && "Call to getTail on uninitialized list.");
- return indexListHead->getPrev();
- }
-
- const IndexListEntry* getTail() const {
- assert(indexListHead != 0 && "Call to getTail on uninitialized list.");
- return indexListHead->getPrev();
- }
-
- // Returns true if the index list is empty.
- bool empty() const { return (indexListHead == getTail()); }
-
- IndexListEntry* front() {
- assert(!empty() && "front() called on empty index list.");
- return indexListHead;
- }
-
- const IndexListEntry* front() const {
- assert(!empty() && "front() called on empty index list.");
- return indexListHead;
- }
-
- IndexListEntry* back() {
- assert(!empty() && "back() called on empty index list.");
- return getTail()->getPrev();
- }
-
- const IndexListEntry* back() const {
- assert(!empty() && "back() called on empty index list.");
- return getTail()->getPrev();
- }
-
- /// Insert a new entry before itr.
- void insert(IndexListEntry *itr, IndexListEntry *val) {
- assert(itr != 0 && "itr should not be null.");
- IndexListEntry *prev = itr->getPrev();
- val->setNext(itr);
- val->setPrev(prev);
-
- if (itr != indexListHead) {
- prev->setNext(val);
- }
- else {
- indexListHead = val;
- }
- itr->setPrev(val);
- }
-
- /// Push a new entry on to the end of the list.
- void push_back(IndexListEntry *val) {
- insert(getTail(), val);
- }
-
- /// Renumber locally after inserting newEntry.
- void renumberIndexes(IndexListEntry *newEntry);
+ /// Renumber locally after inserting curItr.
+ void renumberIndexes(IndexList::iterator curItr);
public:
static char ID;
- SlotIndexes() : MachineFunctionPass(ID), indexListHead(0) {
+ SlotIndexes() : MachineFunctionPass(ID) {
initializeSlotIndexesPass(*PassRegistry::getPassRegistry());
}
virtual void getAnalysisUsage(AnalysisUsage &au) const;
- virtual void releaseMemory();
+ virtual void releaseMemory();
virtual bool runOnMachineFunction(MachineFunction &fn);
@@ -463,22 +406,21 @@ namespace llvm {
/// Returns the zero index for this analysis.
SlotIndex getZeroIndex() {
- assert(front()->getIndex() == 0 && "First index is not 0?");
- return SlotIndex(front(), 0);
+ assert(indexList.front().getIndex() == 0 && "First index is not 0?");
+ return SlotIndex(&indexList.front(), 0);
}
/// Returns the base index of the last slot in this analysis.
SlotIndex getLastIndex() {
- return SlotIndex(back(), 0);
+ return SlotIndex(&indexList.back(), 0);
}
/// Returns the distance between the highest and lowest indexes allocated
/// so far.
unsigned getIndexesLength() const {
- assert(front()->getIndex() == 0 &&
+ assert(indexList.front().getIndex() == 0 &&
"Initial index isn't zero?");
-
- return back()->getIndex();
+ return indexList.back().getIndex();
}
/// Returns the number of instructions in the function.
@@ -503,19 +445,15 @@ namespace llvm {
/// Returns the instruction for the given index, or null if the given
/// index has no instruction associated with it.
MachineInstr* getInstructionFromIndex(SlotIndex index) const {
- return index.isValid() ? index.entry().getInstr() : 0;
+ return index.isValid() ? index.listEntry()->getInstr() : 0;
}
/// Returns the next non-null index.
SlotIndex getNextNonNullIndex(SlotIndex index) {
- SlotIndex nextNonNull = index.getNextIndex();
-
- while (&nextNonNull.entry() != getTail() &&
- getInstructionFromIndex(nextNonNull) == 0) {
- nextNonNull = nextNonNull.getNextIndex();
- }
-
- return nextNonNull;
+ IndexList::iterator itr(index.listEntry());
+ ++itr;
+ while (itr != indexList.end() && itr->getInstr() == 0) { ++itr; }
+ return SlotIndex(itr, index.getSlot());
}
/// getIndexBefore - Returns the index of the last indexed instruction
@@ -659,31 +597,31 @@ namespace llvm {
assert(mi->getParent() != 0 && "Instr must be added to function.");
// Get the entries where mi should be inserted.
- IndexListEntry *prevEntry, *nextEntry;
+ IndexList::iterator prevItr, nextItr;
if (Late) {
// Insert mi's index immediately before the following instruction.
- nextEntry = &getIndexAfter(mi).entry();
- prevEntry = nextEntry->getPrev();
+ nextItr = getIndexAfter(mi).listEntry();
+ prevItr = prior(nextItr);
} else {
// Insert mi's index immediately after the preceeding instruction.
- prevEntry = &getIndexBefore(mi).entry();
- nextEntry = prevEntry->getNext();
+ prevItr = getIndexBefore(mi).listEntry();
+ nextItr = next(prevItr);
}
// Get a number for the new instr, or 0 if there's no room currently.
// In the latter case we'll force a renumber later.
- unsigned dist = ((nextEntry->getIndex() - prevEntry->getIndex())/2) & ~3u;
- unsigned newNumber = prevEntry->getIndex() + dist;
+ unsigned dist = ((nextItr->getIndex() - prevItr->getIndex())/2) & ~3u;
+ unsigned newNumber = prevItr->getIndex() + dist;
// Insert a new list entry for mi.
- IndexListEntry *newEntry = createEntry(mi, newNumber);
- insert(nextEntry, newEntry);
+ IndexList::iterator newItr =
+ indexList.insert(nextItr, createEntry(mi, newNumber));
// Renumber locally if we need to.
if (dist == 0)
- renumberIndexes(newEntry);
+ renumberIndexes(newItr);
- SlotIndex newIndex(newEntry, SlotIndex::Slot_Block);
+ SlotIndex newIndex(&*newItr, SlotIndex::Slot_Block);
mi2iMap.insert(std::make_pair(mi, newIndex));
return newIndex;
}
@@ -694,7 +632,7 @@ namespace llvm {
// MachineInstr -> index mappings
Mi2IndexMap::iterator mi2iItr = mi2iMap.find(mi);
if (mi2iItr != mi2iMap.end()) {
- IndexListEntry *miEntry(&mi2iItr->second.entry());
+ IndexListEntry *miEntry(mi2iItr->second.listEntry());
assert(miEntry->getInstr() == mi && "Instruction indexes broken.");
// FIXME: Eventually we want to actually delete these indexes.
miEntry->setInstr(0);
@@ -709,7 +647,7 @@ namespace llvm {
if (mi2iItr == mi2iMap.end())
return;
SlotIndex replaceBaseIndex = mi2iItr->second;
- IndexListEntry *miEntry(&replaceBaseIndex.entry());
+ IndexListEntry *miEntry(replaceBaseIndex.listEntry());
assert(miEntry->getInstr() == mi &&
"Mismatched instruction in index tables.");
miEntry->setInstr(newMI);
@@ -726,13 +664,13 @@ namespace llvm {
IndexListEntry *nextEntry = 0;
if (nextMBB == mbb->getParent()->end()) {
- nextEntry = getTail();
+ nextEntry = indexList.end();
} else {
- nextEntry = &getMBBStartIdx(nextMBB).entry();
+ nextEntry = getMBBStartIdx(nextMBB).listEntry();
}
- insert(nextEntry, startEntry);
- insert(nextEntry, stopEntry);
+ indexList.insert(nextEntry, startEntry);
+ indexList.insert(nextEntry, stopEntry);
SlotIndex startIdx(startEntry, SlotIndex::Slot_Block);
SlotIndex endIdx(nextEntry, SlotIndex::Slot_Block);
@@ -766,4 +704,4 @@ namespace llvm {
}
-#endif // LLVM_CODEGEN_LIVEINDEX_H
+#endif // LLVM_CODEGEN_SLOTINDEXES_H
generated by cgit v1.1 at 2025-02-02 09:25:28 +0000