6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-16 00:33:10 +00:00
Code Issues Projects Releases Wiki Activity

Do a separate pass to compute spill weights because doing it inline

Browse Source 
with live intervals was missing registers that were used before they
were defined (in the arbitrary order live intervals numbers
instructions).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10603 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2003-12-24 15:44:53 +00:00
parent 71f0a828a6
commit 7a40eaacee
1 changed files with 27 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -106,6 +106,33 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
computeIntervals();
// compute spill weights
const LoopInfo& loopInfo = getAnalysis<LoopInfo>();
for (MbbIndex2MbbMap::iterator
it = mbbi2mbbMap_.begin(), itEnd = mbbi2mbbMap_.end();
it != itEnd; ++it) {
MachineBasicBlock* mbb = it->second;
unsigned loopDepth = loopInfo.getLoopDepth(mbb->getBasicBlock());
for (MachineBasicBlock::iterator mi = mbb->begin(), miEnd = mbb->end();
mi != miEnd; ++mi) {
MachineInstr* instr = *mi;
for (int i = instr->getNumOperands() - 1; i >= 0; --i) {
MachineOperand& mop = instr->getOperand(i);
if (!mop.isVirtualRegister())
continue;
unsigned reg = mop.getAllocatedRegNum();
Reg2IntervalMap::iterator r2iit = r2iMap_.find(reg);
assert(r2iit != r2iMap_.end());
intervals_[r2iit->second].weight += pow(10.0F, loopDepth);
}
}
}
return true;
}
@ -255,8 +282,6 @@ void LiveIntervals::computeIntervals()
{
DEBUG(std::cerr << "computing live intervals:\n");
const LoopInfo& loopInfo = getAnalysis<LoopInfo>();
for (MbbIndex2MbbMap::iterator
it = mbbi2mbbMap_.begin(), itEnd = mbbi2mbbMap_.end();
it != itEnd; ++it) {
@ -264,8 +289,6 @@ void LiveIntervals::computeIntervals()
DEBUG(std::cerr << "machine basic block: "
<< mbb->getBasicBlock()->getName() << "\n");
unsigned loopDepth = loopInfo.getLoopDepth(mbb->getBasicBlock());
for (MachineBasicBlock::iterator mi = mbb->begin(), miEnd = mbb->end();
mi != miEnd; ++mi) {
MachineInstr* instr = *mi;
@ -296,12 +319,6 @@ void LiveIntervals::computeIntervals()
else
handleVirtualRegisterDef(mbb, mi, reg);
}
// update weights
Reg2IntervalMap::iterator r2iit = r2iMap_.find(reg);
if (r2iit != r2iMap_.end() &&
reg >= MRegisterInfo::FirstVirtualRegister)
intervals_[r2iit->second].weight += pow(10.0F, loopDepth);
}
}
}