5e0efc0f1d
This is a reland of https://github.com/llvm/llvm-project/pull/155107 along with a fix for old gcc builds. This patch is reverted in https://github.com/llvm/llvm-project/pull/188344 due to compilation failures described in https://github.com/llvm/llvm-project/pull/155107#issuecomment-4121292756 The fix to old gcc builds is to remove `constexpr` modifiers in the original patch in 0721d8e7768c011b8cf2d4d223ca6eca3392b1f9
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'.