[Debugify] Mark mir-check-debugify change nothing of input

Reviewed By: pengfei Differential Revision: https://reviews.llvm.org/D119914
llvm · Feb 16, 2022 · ce02c79 · ce02c79
1 parent 9bde881
commit ce02c79
Showing 1 changed file with 4 additions and 5 deletions.
diff --git a/llvm/lib/CodeGen/MachineCheckDebugify.cpp b/llvm/lib/CodeGen/MachineCheckDebugify.cpp
@@ -27,16 +27,16 @@ namespace {
 
 struct CheckDebugMachineModule : public ModulePass {
   bool runOnModule(Module &M) override {
-    MachineModuleInfo &MMI =
-        getAnalysis<MachineModuleInfoWrapperPass>().getMMI();
-
     NamedMDNode *NMD = M.getNamedMetadata("llvm.mir.debugify");
     if (!NMD) {
       errs() << "WARNING: Please run mir-debugify to generate "
                 "llvm.mir.debugify metadata first.\n";
       return false;
     }
 
+    MachineModuleInfo &MMI =
+        getAnalysis<MachineModuleInfoWrapperPass>().getMMI();
+
     auto getDebugifyOperand = [&](unsigned Idx) -> unsigned {
       return mdconst::extract<ConstantInt>(NMD->getOperand(Idx)->getOperand(0))
           ->getZExtValue();
@@ -106,8 +106,7 @@ struct CheckDebugMachineModule : public ModulePass {
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<MachineModuleInfoWrapperPass>();
-    AU.addPreserved<MachineModuleInfoWrapperPass>();
-    AU.setPreservesCFG();
+    AU.setPreservesAll();
   }
 
   static char ID; // Pass identification.