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When rewriting defs and uses after spilling, don't set the weight of a

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live interval to infinity if the instruction being rewritten is an
original remat def instruction.  We were only checking against the clone
of the remat def which doesn't actually appear in the IR at all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51440 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Greene 2008-05-22 21:16:33 +00:00
parent cff860801e
commit abe93d95e8
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -1150,7 +1150,9 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
} }
MachineBasicBlock *MBB = MI->getParent(); MachineBasicBlock *MBB = MI->getParent();
if (ImpUse && MI != ReMatDefMI) { // ReMatDefMI is a clone and not in the IR at all, so check
// RefMatOrigDefMI too.
if (ImpUse && MI != ReMatDefMI && MI != ReMatOrigDefMI) {
// Re-matting an instruction with virtual register use. Update the // Re-matting an instruction with virtual register use. Update the
// register interval's spill weight to HUGE_VALF to prevent it from // register interval's spill weight to HUGE_VALF to prevent it from
// being spilled. // being spilled.