Fix a crash in the ImplicitNullChecks pass.

Re: dotnet/runtime#46817 (comment)
dotnet · Mar 26, 2022 · f1f846f · f1f846f
1 parent 3c78a53
commit f1f846f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/llvm/lib/CodeGen/ImplicitNullChecks.cpp b/llvm/lib/CodeGen/ImplicitNullChecks.cpp
@@ -353,6 +353,8 @@ ImplicitNullChecks::areMemoryOpsAliased(const MachineInstr &MI,
           return AR_MayAlias;
         continue;
       }
+      if (MMO2->getValue() == nullptr)
+		return AR_MayAlias;
       if (!AA->isNoAlias(
               MemoryLocation::getAfter(MMO1->getValue(), MMO1->getAAInfo()),
               MemoryLocation::getAfter(MMO2->getValue(), MMO2->getAAInfo())))