The interleaved access pass is an IR-to-IR transformation that runs before code generation. It matches interleaved memory operations to target-specific intrinsics (that are later lowered to load and store multiple instructions on ARM/AArch64). We place tests for similar passes (e.g., GlobalMergePass) under test/Transforms. This patch moves the InterleavedAccessPass tests out of test/CodeGen and into target-specific directories under test/Transforms/InterleavedAccess.
Although the pass is an IR pass, many of the existing tests were llc tests rather opt tests. For example, the tests would check for ldN/stN instructions generated by llc rather than the intrinsic calls the pass actually inserts. Thus, this patch updates all tests to be opt tests that check for the inserted intrinsics. We already have separate CodeGen tests that ensure we lower the interleaved access intrinsics to their corresponding ldN/stN instructions. In addition to migrating the tests to opt, this patch also performs some minor clean-up (to ensure consistent naming, etc.).