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Move stack slot assignments into LiveRangeEdit.

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All registers created during splitting or spilling are assigned to the same
stack slot as the parent register.

When splitting or rematting, we may not spill at all. In that case the stack
slot is still assigned, but it will be dead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116546 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-10-15 00:16:55 +00:00
parent a17768f582
commit 2a0180fbff
4 changed files with 16 additions and 10 deletions
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lib/CodeGen/SplitKit.cpp
-6
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@@ -591,12 +591,6 @@ SplitEditor::SplitEditor(SplitAnalysis &sa, LiveIntervals &lis, VirtRegMap &vrm,
openli_(lis_, *curli_)
{
assert(curli_ && "SplitEditor created from empty SplitAnalysis");
// Make sure curli_ is assigned a stack slot, so all our intervals get the
// same slot as curli_.
if (vrm_.getStackSlot(curli_->reg) == VirtRegMap::NO_STACK_SLOT)
vrm_.assignVirt2StackSlot(curli_->reg);
}
bool SplitEditor::intervalsLiveAt(SlotIndex Idx) const {