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Fix the unused but nearly correct method SlotIndexes::insertMBBInMaps() and add

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support for updating SlotIndexes to MachineBasicBlock::SplitCriticalEdge(). This
calls renumberIndexes() every time; it should be improved to only renumber
locally.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174851 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2013-02-10 23:29:54 +00:00
parent 36f54480f8
commit f5844a7515
2 changed files with 26 additions and 10 deletions
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22
include/llvm/CodeGen/SlotIndexes.h
View File

@ -602,21 +602,21 @@ namespace llvm {
void insertMBBInMaps(MachineBasicBlock *mbb) {
MachineFunction::iterator nextMBB =
llvm::next(MachineFunction::iterator(mbb));
IndexListEntry *nextEntry = 0;
if (nextMBB == mbb->getParent()->end())
nextEntry = &indexList.back();
else
nextEntry = getMBBStartIdx(nextMBB).listEntry();
IndexListEntry *startEntry = createEntry(0, 0);
IndexListEntry *stopEntry = createEntry(0, 0);
IndexListEntry *nextEntry = 0;
if (nextMBB == mbb->getParent()->end()) {
nextEntry = indexList.end();
} else {
nextEntry = getMBBStartIdx(nextMBB).listEntry();
}
indexList.insert(nextEntry, startEntry);
indexList.insert(nextEntry, stopEntry);
indexList.insertAfter(nextEntry, startEntry);
indexList.insertAfter(startEntry, stopEntry);
SlotIndex startIdx(startEntry, SlotIndex::Slot_Block);
SlotIndex endIdx(nextEntry, SlotIndex::Slot_Block);
SlotIndex endIdx(stopEntry, SlotIndex::Slot_Block);
assert(unsigned(mbb->getNumber()) == MBBRanges.size() &&
"Blocks must be added in order");
@ -624,6 +624,8 @@ namespace llvm {
idx2MBBMap.push_back(IdxMBBPair(startIdx, mbb));
// FIXME: Renumber locally instead of renumbering the whole function every
// time a new block is inserted.
renumberIndexes();
std::sort(idx2MBBMap.begin(), idx2MBBMap.end(), Idx2MBBCompare());
}

14
lib/CodeGen/MachineBasicBlock.cpp
View File

@ -662,6 +662,9 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
" BB#" << getNumber()
<< " -- BB#" << NMBB->getNumber()
<< " -- BB#" << Succ->getNumber() << '\n');
SlotIndexes *Indexes = P->getAnalysisIfAvailable<SlotIndexes>();
if (Indexes)
Indexes->insertMBBInMaps(NMBB);
// On some targets like Mips, branches may kill virtual registers. Make sure
// that LiveVariables is properly updated after updateTerminator replaces the
@ -697,6 +700,17 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
if (!NMBB->isLayoutSuccessor(Succ)) {
Cond.clear();
MF->getTarget().getInstrInfo()->InsertBranch(*NMBB, Succ, NULL, Cond, dl);
if (Indexes) {
for (instr_iterator I = NMBB->instr_begin(), E = NMBB->instr_end();
I != E; ++I) {
// Some instructions may have been moved to NMBB by updateTerminator(),
// so we first remove any instruction that already has an index.
if (Indexes->hasIndex(I))
Indexes->removeMachineInstrFromMaps(I);
Indexes->insertMachineInstrInMaps(I);
}
}
}
// Fix PHI nodes in Succ so they refer to NMBB instead of this