[MachineVerifier] Try harder to verify SlotIndexes

Verify the SlotIndexes 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.

Differential Revision: https://reviews.llvm.org/D129201

diff --git a/llvm/lib/CodeGen/MachineVerifier.cpp b/llvm/lib/CodeGen/MachineVerifier.cpp
index d26b554..84ebcd1 100644 (file)
--- a/llvm/lib/CodeGen/MachineVerifier.cpp
+++ b/llvm/lib/CodeGen/MachineVerifier.cpp
@@ -296,6 +296,7 @@ namespace {
     void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addUsedIfAvailable<LiveStacks>();
       AU.addUsedIfAvailable<LiveVariables>();
+      AU.addUsedIfAvailable<SlotIndexes>();
       AU.setPreservesAll();
       MachineFunctionPass::getAnalysisUsage(AU);
     }