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Add blocks to the LiveIntervalAnalysis RegMaskBlocks array when splitting

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a critical edge.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174936 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2013-02-12 03:49:20 +00:00
parent dbf10c4349
commit dd58fa4869
2 changed files with 13 additions and 2 deletions
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7
include/llvm/CodeGen/LiveIntervalAnalysis.h
View File

@ -214,6 +214,13 @@ namespace llvm {
return Indexes->getMBBFromIndex(index);
}
void insertMBBInMaps(MachineBasicBlock *MBB) {
Indexes->insertMBBInMaps(MBB);
assert(unsigned(MBB->getNumber()) == RegMaskBlocks.size() &&
"Blocks must be added in order.");
RegMaskBlocks.push_back(std::make_pair(MBB->getNumber(), 0));
}
SlotIndex InsertMachineInstrInMaps(MachineInstr *MI) {
return Indexes->insertMachineInstrInMaps(MI);
}

8
lib/CodeGen/MachineBasicBlock.cpp
View File

@ -664,8 +664,12 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
" BB#" << getNumber()
<< " -- BB#" << NMBB->getNumber()
<< " -- BB#" << Succ->getNumber() << '\n');
LiveIntervals *LIS = P->getAnalysisIfAvailable<LiveIntervals>();
SlotIndexes *Indexes = P->getAnalysisIfAvailable<SlotIndexes>();
if (Indexes)
if (LIS)
LIS->insertMBBInMaps(NMBB);
else if (Indexes)
Indexes->insertMBBInMaps(NMBB);
// On some targets like Mips, branches may kill virtual registers. Make sure
@ -771,7 +775,7 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
LV->addNewBlock(NMBB, this, Succ);
}
if (LiveIntervals *LIS = P->getAnalysisIfAvailable<LiveIntervals>()) {
if (LIS) {
// After splitting the edge and updating SlotIndexes, live intervals may be
// in one of two situations, depending on whether this block was the last in
// the function. If the original block was the last in the function, all live