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Don't assign a new stack slot if the pre-alloc splitter already assigned one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67764 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1973,8 +1973,15 @@ addIntervalsForSpills(const LiveInterval &li,
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}
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// One stack slot per live interval.
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if (NeedStackSlot && vrm.getPreSplitReg(li.reg) == 0)
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Slot = vrm.assignVirt2StackSlot(li.reg);
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if (NeedStackSlot && vrm.getPreSplitReg(li.reg) == 0) {
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if (vrm.getStackSlot(li.reg) == VirtRegMap::NO_STACK_SLOT)
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Slot = vrm.assignVirt2StackSlot(li.reg);
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// This case only occurs when the prealloc splitter has already assigned
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// a stack slot to this vreg.
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else
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Slot = vrm.getStackSlot(li.reg);
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}
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// Create new intervals and rewrite defs and uses.
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for (LiveInterval::Ranges::const_iterator
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