[LLVMbugs] [Bug 12231] New: 'Simplify the CFG' crashes: Use still stuck around after Def is destroyed

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12231

             Bug #: 12231
           Summary: 'Simplify the CFG' crashes: Use still stuck around
                    after Def is destroyed
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: kcc at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8180
  --> http://llvm.org/bugs/attachment.cgi?id=8180
crash.c

r152415, Linux x86_64

% clang -c -w -O2 crash.c

While deleting: i320 %ins52
Use still stuck around after Def is destroyed:0  clang          
0x0000000001b198bf
...

1.      <eof> parser at end of file
2.      Per-module optimization passes
3.      Running pass 'CallGraph Pass Manager' on module 'crash.c'.
4.      Running pass 'Simplify the CFG' on function '@func_18'
clang: error: unable to execute command: Segmentation fault


The test is produced by "csmith" and minimized by "delta".

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