[llvm-bugs] [Bug 51991] New: Assertion related to NPM, MSSA and TBAA

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Sep 28 01:34:53 PDT 2021


https://bugs.llvm.org/show_bug.cgi?id=51991

            Bug ID: 51991
           Summary: Assertion related to NPM, MSSA and TBAA
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: markus.lavin at ericsson.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 25300
  --> https://bugs.llvm.org/attachment.cgi?id=25300&action=edit
Reproducer input.

$ opt -mtriple=x86_64-unknown-linux-gnu -aa-pipeline=tbaa
--passes='early-cse<memssa>,loop-mssa(licm)' -o /dev/null bbi-58502-5.ll

llvm/lib/Analysis/AliasSetTracker.cpp:241: bool
llvm::AliasSet::aliasesUnknownInst(const llvm::Instruction *,
llvm::AliasAnalysis &) const: Assertion `Inst->mayReadOrWriteMemory() &&
"Instruction must either read or write memory."' failed.

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