Min-Yih Hsu 00fcf9e95a [mlir][LLVMIR] Add support for importing struct-type ConstantAggregate(Zero) ...

And move importer test files from `test/Target/LLVMIR` into
`test/Target/LLVMIR/Import`.

We simply translate struct-type ConstantAggregate(Zero) into a
serious of `llvm.insertvalue` operations against a `llvm.undef` root.
Note that this doesn't affect the original logics on translating
vector/array-type ConstantAggregate values.

Differential Revision: https://reviews.llvm.org/D124399

2022-04-27 09:42:26 -07:00

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