[LLVMbugs] [Bug 6102] New: assertion " Not all catch info was assigned to a landing pad!"

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=6102

           Summary: assertion "Not all catch info was assigned to a landing
                    pad!"
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: vargaz at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=4084)
 --> (http://llvm.org/bugs/attachment.cgi?id=4084)
testcase

Not sure if this is a code generator or an optimizer problem.

In the attached testcase, llvm.eh.selector is called in a bblock which is a
target of an invoke, but the invoke is optimized away by 'opt' since it is in
an unreachable bblock, causing llc to crash with the following assertion:

llc: SelectionDAGISel.cpp:355: virtual bool
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&): Assertion
`FuncInfo->CatchInfoFound.size() == FuncInfo->CatchInfoLost.size() && "Not all
catch info was assigned to a landing pad!"' failed.                             

To reproduce:

llvm-as -o bug.bc bug.ll && opt bug.bc -O2 -o bug2.bc && llc bug2.bc

This is with llvm trunk on x86-64.


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