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Now with less iterator invalidation, and other forms of crashing! 

llvm-svn: 73256
This commit is contained in:
Owen Anderson 2009-06-12 21:41:29 +00:00
parent b6cf8dbb96
commit d0428da398
1 changed files with 6 additions and 3 deletions
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9
llvm/lib/CodeGen/LazyLiveness.cpp
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@ -22,6 +22,7 @@
using namespace llvm;
char LazyLiveness::ID = 0;
static RegisterPass<LazyLiveness> X("lazy-liveness", "Lazy Liveness Analysis");
void LazyLiveness::computeBackedgeChain(MachineFunction& mf,
MachineBasicBlock* MBB) {
@ -65,7 +66,7 @@ bool LazyLiveness::runOnMachineFunction(MachineFunction &mf) {
// Step 0: Compute preorder numbering for all MBBs.
unsigned num = 0;
for (df_iterator<MachineBasicBlock*> DI = df_begin(&*mf.begin());
DI != df_end(&*mf.end()); ++DI) {
DI != df_end(&*mf.begin()); ++DI) {
preorder[*DI] = num++;
rev_preorder.push_back(*DI);
}
@ -103,8 +104,10 @@ bool LazyLiveness::runOnMachineFunction(MachineFunction &mf) {
if (!backedge_target.test(preorder[*POI]))
for (MachineBasicBlock::succ_iterator SI = (*POI)->succ_begin();
SI != (*POI)->succ_end(); ++SI)
if (!backedges.count(std::make_pair(*POI, *SI)) && tv.count(*SI))
tv[*POI]= tv[*SI];
if (!backedges.count(std::make_pair(*POI, *SI)) && tv.count(*SI)) {
SparseBitVector<128>& PBV = tv[*POI];
PBV = tv[*SI];
}
for (po_iterator<MachineBasicBlock*> POI = po_begin(&*mf.begin()),
POE = po_end(&*mf.begin()); POI != POE; ++POI)