[PATCH] D129213: [MachineVerifier] Try harder to verify LiveVariables

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
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Verify the LiveVariables analysis after a pass that claims to preserve
it, even if there are no further passes (apart from the verifier itself)
that would use the analysis.

FIXME: CodeGen/AMDGPU/mul24-pass-ordering.ll fails with:

- Bad machine code: LiveVariables: Block should not be in AliveBlocks ***

FIXME: X86 tests fail with:

- Bad machine code: Kill missing from LiveVariables ***


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D129213

Files:
  llvm/lib/CodeGen/MachineVerifier.cpp


Index: llvm/lib/CodeGen/MachineVerifier.cpp
===================================================================
--- llvm/lib/CodeGen/MachineVerifier.cpp
+++ llvm/lib/CodeGen/MachineVerifier.cpp
@@ -293,6 +293,7 @@
       }
 
     void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.addUsedIfAvailable<LiveVariables>();
       AU.setPreservesAll();
       MachineFunctionPass::getAnalysisUsage(AU);
     }


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