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Add LiveIntervals::getLastSplitPoint().

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A live range cannot be split everywhere in a basic block. A split must go before
the first terminator, and if the variable is live into a landing pad, the split
must happen before the call that can throw.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124894 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-02-04 19:33:11 +00:00
parent 9b3d24bf3d
commit cb6404711b
5 changed files with 43 additions and 1 deletions
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2
lib/CodeGen/SplitKit.cpp
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@ -826,7 +826,7 @@ SlotIndex SplitEditor::enterIntvAtEnd(MachineBasicBlock &MBB) {
}
DEBUG(dbgs() << ": valno " << ParentVNI->id);
VNInfo *VNI = defFromParent(OpenIdx, ParentVNI, Last, MBB,
MBB.getFirstTerminator());
LIS.getLastSplitPoint(Edit.getParent(), &MBB));
RegAssign.insert(VNI->def, End, OpenIdx);
DEBUG(dump());
return VNI->def;