RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-24 19:52:54 +01:00
Code Issues Projects Releases Wiki Activity

Properly deal with empty intervals when checking for interference.

Browse Source 
llvm-svn: 121319
This commit is contained in:
Jakob Stoklund Olesen 2010-12-08 23:51:35 +00:00
parent e270068021
commit ffc0f6586a
2 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/CodeGen/LiveIntervalUnion.cpp
View File

@ -111,9 +111,10 @@ void LiveIntervalUnion::verify(LiveVirtRegBitSet& VisitedVRegs) {
// Assumes that segments are sorted by start position in both
// LiveInterval and LiveSegments.
void LiveIntervalUnion::Query::findIntersection(InterferenceResult &IR) const {
// Search until reaching the end of the LiveUnion segments.
LiveInterval::iterator VirtRegEnd = VirtReg->end();
if (IR.VirtRegI == VirtRegEnd)
return;
while (IR.LiveUnionI.valid()) {
// Slowly advance the live virtual reg iterator until we surpass the next
// segment in LiveUnion.

1
lib/CodeGen/RegAllocGreedy.cpp
View File

@ -173,6 +173,7 @@ unsigned RAGreedy::selectOrSplit(LiveInterval &VirtReg,
// Found an available register.
return PhysReg;
}
assert(!VirtReg.empty() && "Empty VirtReg has interference");
LiveInterval *interferingVirtReg =
Queries[interfReg].firstInterference().liveUnionPos().value();