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condsets
2017 Jul 26
2
isSSA computation in MIR parser
...on is not comprehensive? It also doesn't take
into account non-SSA tests which use virtual registers but happen to not
assign twice to each.
Duplicate assignments imply not-SSA, but no duplicate (virtual reg)
assignments doesn't imply SSA?
I noticed a Hexagon test (CodeGen/Hexagon/expand-condsets-rm-reg.mir)
has a hack around this by inserting an additional COPY to a register,
but that shouldn't be required. It means tests that are generated using
llc might be failing because they are wrongly identified as SSA.
Thanks,
--
Verena Beckham
Senior Principal Software Engineer, Compil...