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Fold open interval ends handling into

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LiveIntervals::Interval::expiredAt() and simplify regalloc code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10894 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2004-01-16 20:17:05 +00:00
parent 1893a05b28
commit 3b02cbe752
4 changed files with 7 additions and 13 deletions
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14
lib/CodeGen/RegAllocLinearScan.cpp
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@@ -428,11 +428,8 @@ void RA::processActiveIntervals(IntervalPtrs::value_type cur)
DEBUG(std::cerr << "\tprocessing active intervals:\n");
for (IntervalPtrs::iterator i = active_.begin(); i != active_.end();) {
unsigned reg = (*i)->reg;
// remove expired intervals. we expire earlier because this if
// an interval expires this is going to be the last use. in
// this case we can reuse the register for a def in the same
// instruction
if ((*i)->expiredAt(cur->start() + 1)) {
// remove expired intervals
if ((*i)->expiredAt(cur->start())) {
DEBUG(std::cerr << "\t\tinterval " << **i << " expired\n");
if (reg >= MRegisterInfo::FirstVirtualRegister) {
reg = v2pMap_[reg];
@@ -465,11 +462,8 @@ void RA::processInactiveIntervals(IntervalPtrs::value_type cur)
for (IntervalPtrs::iterator i = inactive_.begin(); i != inactive_.end();) {
unsigned reg = (*i)->reg;
// remove expired intervals. we expire earlier because this if
// an interval expires this is going to be the last use. in
// this case we can reuse the register for a def in the same
// instruction
if ((*i)->expiredAt(cur->start() + 1)) {
// remove expired intervals
if ((*i)->expiredAt(cur->start())) {
DEBUG(std::cerr << "\t\t\tinterval " << **i << " expired\n");
// remove from inactive
i = inactive_.erase(i);