[LLVMbugs] [Bug 146] NEW: Interpreter does not handle setne constant expression

bugzilla-daemon at zion.cs.uiuc.edu bugzilla-daemon at zion.cs.uiuc.edu
Thu Nov 20 18:00:50 PST 2003


           Summary: Interpreter does not handle setne constant expression
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Interpreter
        AssignedTo: gaeke+bugs at uiuc.edu
        ReportedBy: criswell at uiuc.edu

The lli program fails on the following instruction when the -force-interpreter
option is used:

br bool setne (void ()* %_GLOBAL__D_lshaped_driver.cpp_00000000_A3849043, void
()* null), label %then.0.i, label %loopentry.i

The lli program aborts with:

Unhandled ConstantExpr:  bool setne (void ()*
%_GLOBAL__D_lshaped_driver.cpp_00000000_A3849043, void ()* null)

Examination and some extra debugging added to
lib/ExecutionEngine/Interpreter/Execution.cpp seems to indicate that the setne
instruction is castable as a constant expression (which makes sense because null
is constant and the %_GLOBAL... is the name of an internal function).  However,
the interpreter cannot interpret a setne constant expression, so lli aborts.

I'll try to create a smaller test case later tonight.

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