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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-12-08 23:51:35 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-12-08 23:51:35 +0000 |
| commit | 8c5f0c3115d3066bf35b5e0c2456356d8dbb6c07 (patch) | |
| tree | be466577f2f4002baa52a3c853d966599d47c1ba /llvm/lib/CodeGen/LiveIntervalUnion.cpp | |
| parent | bbedd062c9050a5ddd92398b10d3f9e73adfb1c1 (diff) | |
| download | bcm5719-llvm-8c5f0c3115d3066bf35b5e0c2456356d8dbb6c07.tar.gz bcm5719-llvm-8c5f0c3115d3066bf35b5e0c2456356d8dbb6c07.zip | |
Properly deal with empty intervals when checking for interference.
llvm-svn: 121319
Diffstat (limited to 'llvm/lib/CodeGen/LiveIntervalUnion.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalUnion.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalUnion.cpp b/llvm/lib/CodeGen/LiveIntervalUnion.cpp index bedf22b5bad..4b9a2d302c0 100644 --- a/llvm/lib/CodeGen/LiveIntervalUnion.cpp +++ b/llvm/lib/CodeGen/LiveIntervalUnion.cpp @@ -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. |
