llvm-project

e1295708 - [Uniformity] Legacy PM: Set UniformityInfoWrapperPass isCFGOnly to false (#148165)

[Uniformity] Legacy PM: Set UniformityInfoWrapperPass isCFGOnly to false (#148165) Currently, Uniformity Analysis is preserved in the Legacy PM when a pass sets `setPreservesCFG()`. This is incorrect: any values' uniformity not only depends on the CFG, but also on the uniformity of other values, so a CFG-preserving change in many cases doesn't preserve uniformity analysis. This corrected behavior also matches the behavior of the new PM. --- On its own, this change does not affect the pass pipeline because of the happenstance of pass ordering. I also created a PR to change AMDGPULateCodeGenPrepare (#148167), this will have an actual impact on pass executions. That PR also includes changes to the `amdgpu/llc-pipeline.ll` test in order to check that this change works, but if this is preferred, I would also be happy to try to extend this PR to add an isolated test case; though my personal opinion is that the test in #148167 should suffice, as it should also accurately pinpoint failures related to this change. --- I ran `git-clang-format` on my changes. I tested them using the `check-llvm` target; no unexpected failures occurred.