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Abstract merging of ranges away from number of slots per instruction.

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Also make it less aggressive as the current implementation breaks in
some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11696 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-02-22 04:05:13 +00:00
parent 0ad9170327
commit 7200c6b82a
4 changed files with 19 additions and 6 deletions
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5
include/llvm/CodeGen/LiveIntervalAnalysis.h
View File

@ -126,7 +126,10 @@ namespace llvm {
};
static unsigned getBaseIndex(unsigned index) {
return index - (index % 4);
return index - (index % InstrSlots::NUM);
}
static unsigned getBoundaryIndex(unsigned index) {
return getBaseIndex(index + InstrSlots::NUM - 1);
}
static unsigned getLoadIndex(unsigned index) {
return getBaseIndex(index) + InstrSlots::LOAD;

5
include/llvm/CodeGen/LiveIntervals.h
View File

@ -126,7 +126,10 @@ namespace llvm {
};
static unsigned getBaseIndex(unsigned index) {
return index - (index % 4);
return index - (index % InstrSlots::NUM);
}
static unsigned getBoundaryIndex(unsigned index) {
return getBaseIndex(index + InstrSlots::NUM - 1);
}
static unsigned getLoadIndex(unsigned index) {
return getBaseIndex(index) + InstrSlots::LOAD;

10
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -227,6 +227,7 @@ void LiveIntervals::updateSpilledInterval(Interval& li, int slot)
// the new spill weight is now infinity as it cannot be spilled again
li.weight = std::numeric_limits<float>::infinity();
DEBUG(std::cerr << '\n');
DEBUG(std::cerr << "\t\t\t\tupdated interval: " << li << '\n');
}
void LiveIntervals::printRegName(unsigned reg) const
@ -652,8 +653,10 @@ void LiveIntervals::Interval::join(const LiveIntervals::Interval& other)
LiveIntervals::Interval::Ranges::iterator
LiveIntervals::Interval::mergeRangesForward(Ranges::iterator it)
{
for (Ranges::iterator n = next(it);
n != ranges.end() && ((it->second & 1) + it->second) >= n->first; ) {
Ranges::iterator n;
while ((n = next(it)) != ranges.end()) {
if (n->first > it->second)
break;
it->second = std::max(it->second, n->second);
n = ranges.erase(n);
}
@ -665,7 +668,8 @@ LiveIntervals::Interval::mergeRangesBackward(Ranges::iterator it)
{
while (it != ranges.begin()) {
Ranges::iterator p = prior(it);
if (it->first > ((p->second & 1) + p->second)) break;
if (it->first > p->second)
break;
it->first = std::min(it->first, p->first);
it->second = std::max(it->second, p->second);

5
lib/CodeGen/LiveIntervalAnalysis.h
View File

@ -126,7 +126,10 @@ namespace llvm {
};
static unsigned getBaseIndex(unsigned index) {
return index - (index % 4);
return index - (index % InstrSlots::NUM);
}
static unsigned getBoundaryIndex(unsigned index) {
return getBaseIndex(index + InstrSlots::NUM - 1);
}
static unsigned getLoadIndex(unsigned index) {
return getBaseIndex(index) + InstrSlots::LOAD;