This reverts commit cb16b33a03aff70b2499c3452f2f817f3f92d20d. In fact, the test https://bugs.chromium.org/p/chromium/issues/detail?id=1446973#c2 already passed after 5586bc539acb26cb94e461438de01a5080513401
This directory contains tests for the MIR file format parser and printer. It was necessary to split the tests across different targets as no single target covers all features available in machine IR. Tests for codegen passes should NOT be here but in test/CodeGen/sometarget. As a rule of thumb this directory should only contain tests using 'llc -run-pass none'.