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Avoid iterating with LiveIntervals::iterator.

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That is a DenseMap iterator keyed by pointers, so the iteration order is
nondeterministic.

I would like to replace the DenseMap with an IndexedMap which doesn't
allow iteration.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158856 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-06-20 21:25:05 +00:00
parent 02a227af91
commit d67582e276
3 changed files with 44 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/RegAllocPBQP.cpp
+9 -13
View File
@@ -205,12 +205,11 @@ std::auto_ptr<PBQPRAProblem> PBQPBuilder::build(MachineFunction *mf,
RegSet pregs;
// Collect the set of preg intervals, record that they're used in the MF.
for (LiveIntervals::const_iterator itr = lis->begin(), end = lis->end();
itr != end; ++itr) {
if (TargetRegisterInfo::isPhysicalRegister(itr->first)) {
pregs.insert(itr->first);
mri->setPhysRegUsed(itr->first);
}
for (unsigned Reg = 1, e = tri->getNumRegs(); Reg != e; ++Reg) {
if (!lis->hasInterval(Reg))
continue;
pregs.insert(Reg);
mri->setPhysRegUsed(Reg);
}
BitVector reservedRegs = tri->getReservedRegs(*mf);
@@ -501,14 +500,11 @@ void RegAllocPBQP::getAnalysisUsage(AnalysisUsage &au) const {
void RegAllocPBQP::findVRegIntervalsToAlloc() {
// Iterate over all live ranges.
for (LiveIntervals::iterator itr = lis->begin(), end = lis->end();
itr != end; ++itr) {
// Ignore physical ones.
if (TargetRegisterInfo::isPhysicalRegister(itr->first))
for (unsigned i = 0, e = mri->getNumVirtRegs(); i != e; ++i) {
unsigned Reg = TargetRegisterInfo::index2VirtReg(i);
if (mri->reg_nodbg_empty(Reg))
continue;
LiveInterval *li = itr->second;
LiveInterval *li = &lis->getInterval(Reg);
// If this live interval is non-empty we will use pbqp to allocate it.
// Empty intervals we allocate in a simple post-processing stage in