[LLVMbugs] [Bug 1323] NEW: switch lowering crash

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu Apr 12 21:01:08 PDT 2007


           Summary: switch lowering crash
           Product: libraries
           Version: 1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org

it looks like switch lowering is creating an invalid phi node.  To reproduce, use:

$ llvm-as < bugpoint-reduced-simplified.ll | llc -fast

This seems to only occur with -fast.  Maybe switch lowering depends on critical edges being split or 
something?  -fast is used for -O0 compiles.


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