6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-19 08:35:45 +00:00
Code Issues Projects Releases Wiki Activity

Revert commit 56835 since it breaks the build.

Browse Source 
"If a re-materializable instruction has a register
operand, the spiller will change the register operand's
spill weight to HUGE_VAL to avoid it being spilled.
However, if the operand is already in the queue ready
to be spilled, avoid re-materializing it".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56837 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2008-09-30 10:00:30 +00:00
parent d41474d2c0
commit 46292be362
4 changed files with 8 additions and 105 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/RegAllocLinearScan.cpp
+2 -3
View File
@@ -879,9 +879,8 @@ void RALinScan::assignRegOrStackSlotAtInterval(LiveInterval* cur)
if (cur->weight != HUGE_VALF && cur->weight <= minWeight) {
DOUT << "\t\t\tspilling(c): " << *cur << '\n';
float SSWeight;
SmallVector<LiveInterval*, 8> spillIs;
std::vector<LiveInterval*> added =
li_->addIntervalsForSpills(*cur, spillIs, loopInfo, *vrm_, SSWeight);
li_->addIntervalsForSpills(*cur, loopInfo, *vrm_, SSWeight);
addStackInterval(cur, ls_, li_, SSWeight, *vrm_);
if (added.empty())
return; // Early exit if all spills were folded.
@@ -932,7 +931,7 @@ void RALinScan::assignRegOrStackSlotAtInterval(LiveInterval* cur)
earliestStart = std::min(earliestStart, sli->beginNumber());
float SSWeight;
std::vector<LiveInterval*> newIs =
li_->addIntervalsForSpills(*sli, spillIs, loopInfo, *vrm_, SSWeight);
li_->addIntervalsForSpills(*sli, loopInfo, *vrm_, SSWeight);
addStackInterval(sli, ls_, li_, SSWeight, *vrm_);
std::copy(newIs.begin(), newIs.end(), std::back_inserter(added));
spilled.insert(sli->reg);