Arthur Eubanks 26044c6a54 [InstSimplify] Treat invariant group insts as bitcasts for load operands ...

We can look through invariant group intrinsics for the purposes of
simplifying the result of a load.

Since intrinsics can't be constants, but we also don't want to
completely rewrite load constant folding, we convert the load operand to
a constant. For GEPs and bitcasts we just treat them as constants. For
invariant group intrinsics, we treat them as a bitcast.

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D101103

2021-06-01 16:33:06 -07:00

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