[llvm-bugs] [Bug 42940] New: [MemorySSA] Assertion failed: "Incorrect incoming access into phi."

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42940

            Bug ID: 42940
           Summary: [MemorySSA] Assertion failed: "Incorrect incoming
                    access into phi."
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Global Analyses
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 22362
  --> https://bugs.llvm.org/attachment.cgi?id=22362&action=edit
unreduced test case, opt input

opt -O3 -march=arch13 tc_incorr_inc_acc_into_phi.bc -o a.out
-enable-mssa-loop-dependency

opt -O3 -march=arch13 tc_incorr_inc_acc_into_phi.bc -o a.out
-enable-mssa-loop-dependency                        
opt: llvm/lib/Analysis/MemorySSA.cpp:1884: void
llvm::MemorySSA::verifyPrevDefInPhis(llvm::Function&) const: Assertion `LastAcc
== IncAcc && "Incorrect incoming access into phi."' failed.
...

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