[LLVMbugs] [Bug 2613] New: Debugging labels are not being invalidated after opt pass

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2613

           Summary: Debugging labels are not being invalidated after opt
                    pass
           Product: libraries
           Version: trunk
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: maxburke at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1871)
 --> (http://llvm.org/bugs/attachment.cgi?id=1871)
Test case exhibiting a missing label referred to within debug info

Occasionally there seem to be labels popping up in the DWARF line number
information sections that have been removed from the code. The attached .ll
file when built with the following commands refers to a "label23" in the line
numbers but does not exist in code.

llvm-as -f -o=md5.bc md5.ll
opt -o=md5.opt.bc -f md5.bc -std-compile-opts
llc -asm-verbose -march=ppc64 -f -o=md5.s md5.opt.bc

This has been seen in both 2.3 and in the trunk as of revision 54223


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