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Improved tracking of value number kills. VN kills are now represented

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as an (index,bool) pair. The bool flag records whether the kill is a
PHI kill or not. This code will be used to enable splitting of live
intervals containing PHI-kills.

A slight change to live interval weights introduced an extra spill
into lsr-code-insertion (outside the critical sections). The test 
condition has been updated to reflect this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75097 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames
2009-07-09 03:57:02 +00:00
parent 482fa0f2bc
commit ffd1326ff8
9 changed files with 164 additions and 66 deletions
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4
lib/CodeGen/Spiller.cpp
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@ -136,7 +136,7 @@ protected:
VNInfo *vni =
li->getNextValue(storeInstIdx, 0, true, lis->getVNInfoAllocator());
vni->kills.push_back(storeInstIdx);
li->addKill(vni, storeInstIdx, false);
DOUT << " Inserting store range: [" << start << ", " << end << ")\n";
LiveRange lr(start, end, vni);
@ -201,7 +201,7 @@ protected:
VNInfo *vni =
li->getNextValue(loadInstIdx, 0, true, lis->getVNInfoAllocator());
vni->kills.push_back(lis->getInstructionIndex(mi));
li->addKill(vni, lis->getInstructionIndex(mi), false);
DOUT << " Intserting load range: [" << start << ", " << end << ")\n";
LiveRange lr(start, end, vni);