[llvm] d04f3e0 - [CodeGen] Make MMI immutable NPM pass

[Yuanfang Chen via llvm-commits]

Author: Yuanfang Chen
Date: 2020-08-10T17:52:42-07:00
New Revision: d04f3e028d3287e43d4b84efcc33c2816ac9d3d6

URL: https://github.com/llvm/llvm-project/commit/d04f3e028d3287e43d4b84efcc33c2816ac9d3d6
DIFF: https://github.com/llvm/llvm-project/commit/d04f3e028d3287e43d4b84efcc33c2816ac9d3d6.diff

LOG: [CodeGen] Make MMI immutable NPM pass

Added: 
    

Modified: 
    llvm/include/llvm/CodeGen/MachineModuleInfo.h

Removed: 
    


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diff  --git a/llvm/include/llvm/CodeGen/MachineModuleInfo.h b/llvm/include/llvm/CodeGen/MachineModuleInfo.h
index 0ee595b5b5ce..a37708c55370 100644
--- a/llvm/include/llvm/CodeGen/MachineModuleInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineModuleInfo.h
@@ -54,8 +54,8 @@ class Module;
 //===----------------------------------------------------------------------===//
 /// This class can be derived from and used by targets to hold private
 /// target-specific information for each Module.  Objects of type are
-/// accessed/created with MMI::getInfo and destroyed when the MachineModuleInfo
-/// is destroyed.
+/// accessed/created with MachineModuleInfo::getObjFileInfo and destroyed when
+/// the MachineModuleInfo is destroyed.
 ///
 class MachineModuleInfoImpl {
 public:
@@ -251,6 +251,12 @@ class MachineModuleInfo {
     return Personalities;
   }
   /// \}
+
+  // MMI owes MCContext. It should never be invalidated.
+  bool invalidate(Module &, const PreservedAnalyses &,
+                  ModuleAnalysisManager::Invalidator &) {
+    return false;
+  }
 }; // End class MachineModuleInfo
 
 class MachineModuleInfoWrapperPass : public ImmutablePass {