[LLVMbugs] [Bug 10530] New: early-cse somehow produces invalid bitcode, bitcode cannot be read back

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10530

           Summary: early-cse somehow produces invalid bitcode, bitcode
                    cannot be read back
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=6962)
 --> (http://llvm.org/bugs/attachment.cgi?id=6962)
Testcase

Consider the attached testcase.

I'm having:

$ ./opt -early-cse early-cse-bug.ll | ./llvm-dis
Assertion failed: (ShuffleVectorInst::isValidOperands(V1, V2, Mask) && "Invalid
shuffle vector constant expr operands!"), function getShuffleVector, file
/Users/asl/Projects/llvm/src/lib/VMCore/Constants.cpp, line 1696.

so, the bitcode written cannot be read back.

PS: Does anyone knows how one can strip unused types from the Module in the
shiny new typesystem world?

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