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When we generate spill code, then decide we don't need

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to spill after all, we weren't handling 2-instruction
spill sequences correctly (PPC Altivec).  We need to
remove the store in this case.  Removing the other
instruction(s) would be goodness but is not needed for
correctness, and isn't done here.  7331562.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85437 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2009-10-28 21:56:18 +00:00
parent 7e5d2ff20f
commit e841d2f867
1 changed files with 4 additions and 1 deletions
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5
lib/CodeGen/VirtRegRewriter.cpp
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@ -1430,6 +1430,7 @@ private:
std::vector<MachineOperand*> &KillOps,
VirtRegMap &VRM) {
MachineBasicBlock::iterator oldNextMII = next(MII);
TII->storeRegToStackSlot(MBB, next(MII), PhysReg, true, StackSlot, RC);
MachineInstr *StoreMI = next(MII);
VRM.addSpillSlotUse(StackSlot, StoreMI);
@ -1466,7 +1467,9 @@ private:
}
}
LastStore = next(MII);
// Allow for multi-instruction spill sequences, as on PPC Altivec. Presume
// the last of multiple instructions is the actual store.
LastStore = prior(oldNextMII);
// If the stack slot value was previously available in some other
// register, change it now. Otherwise, make the register available,