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Implement depth_first and inverse_depth_first range factory functions.

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Also updated as many loops as I could find using df_begin/idf_begin -
strangely I found no uses of idf_begin. Is that just used out of tree?

Also a few places couldn't use df_begin because either they used the
member functions of the depth first iterators or had specific ordering
constraints (I added a comment in the latter case).

Based on a patch by Jim Grosbach. (Jim - you just had iterator_range<T>
where you needed iterator_range<idf_iterator<T>>)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206016 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2014-04-11 01:50:01 +00:00
parent ae64ab542a
commit 77cf856e56
10 changed files with 45 additions and 45 deletions
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20
lib/CodeGen/StackColoring.cpp
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@ -193,12 +193,11 @@ void StackColoring::getAnalysisUsage(AnalysisUsage &AU) const {
}
void StackColoring::dump() const {
for (df_iterator<MachineFunction*> FI = df_begin(MF), FE = df_end(MF);
FI != FE; ++FI) {
DEBUG(dbgs()<<"Inspecting block #"<<BasicBlocks.lookup(*FI)<<
" ["<<FI->getName()<<"]\n");
for (MachineBasicBlock *MBB : depth_first(MF)) {
DEBUG(dbgs() << "Inspecting block #" << BasicBlocks.lookup(MBB) << " ["
<< MBB->getName() << "]\n");
LivenessMap::const_iterator BI = BlockLiveness.find(*FI);
LivenessMap::const_iterator BI = BlockLiveness.find(MBB);
assert(BI != BlockLiveness.end() && "Block not found");
const BlockLifetimeInfo &BlockInfo = BI->second;
@ -231,20 +230,19 @@ unsigned StackColoring::collectMarkers(unsigned NumSlot) {
// NOTE: We use the a reverse-post-order iteration to ensure that we obtain a
// deterministic numbering, and because we'll need a post-order iteration
// later for solving the liveness dataflow problem.
for (df_iterator<MachineFunction*> FI = df_begin(MF), FE = df_end(MF);
FI != FE; ++FI) {
for (MachineBasicBlock *MBB : depth_first(MF)) {
// Assign a serial number to this basic block.
BasicBlocks[*FI] = BasicBlockNumbering.size();
BasicBlockNumbering.push_back(*FI);
BasicBlocks[MBB] = BasicBlockNumbering.size();
BasicBlockNumbering.push_back(MBB);
// Keep a reference to avoid repeated lookups.
BlockLifetimeInfo &BlockInfo = BlockLiveness[*FI];
BlockLifetimeInfo &BlockInfo = BlockLiveness[MBB];
BlockInfo.Begin.resize(NumSlot);
BlockInfo.End.resize(NumSlot);
for (MachineInstr &MI : **FI) {
for (MachineInstr &MI : *MBB) {
if (MI.getOpcode() != TargetOpcode::LIFETIME_START &&
MI.getOpcode() != TargetOpcode::LIFETIME_END)
continue;