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Don't assign a new stack slot if the pre-alloc splitter already assigned one.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67764 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2009-03-26 18:53:38 +00:00
parent da4231f134
commit b98bbb7597
1 changed files with 9 additions and 2 deletions
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11
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -1973,8 +1973,15 @@ addIntervalsForSpills(const LiveInterval &li,
}
// One stack slot per live interval.
if (NeedStackSlot && vrm.getPreSplitReg(li.reg) == 0)
Slot = vrm.assignVirt2StackSlot(li.reg);
if (NeedStackSlot && vrm.getPreSplitReg(li.reg) == 0) {
if (vrm.getStackSlot(li.reg) == VirtRegMap::NO_STACK_SLOT)
Slot = vrm.assignVirt2StackSlot(li.reg);
// This case only occurs when the prealloc splitter has already assigned
// a stack slot to this vreg.
else
Slot = vrm.getStackSlot(li.reg);
}
// Create new intervals and rewrite defs and uses.
for (LiveInterval::Ranges::const_iterator