Implement basic support for verifying LiveIntervals for PHIs.
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Interesting. Currently I don't think anything in LLVM tries to use LiveIntervals in SSA form, does it? Even -early-live-intervals only creates them just after PHIElimination.
llvm/lib/CodeGen/MachineVerifier.cpp | ||
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2523 | Could the phi and non-phi cases be commoned some more? Is there any good reason to use SR.getVNInfoAt in one case vs SR.Query in the other? |
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PHIElimination has code to preserve LiveIntervals, although it is incorrect/incomplete which I am currently fixing.
The code for '-early-live-intervals` also suggests the intention is for it to be run before PHIEliminination.
Could the phi and non-phi cases be commoned some more? Is there any good reason to use SR.getVNInfoAt in one case vs SR.Query in the other?