[llvm-bugs] [Bug 27996] New: InstCombine hangs in BitCast optimization

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27996

            Bug ID: 27996
           Summary: InstCombine hangs in BitCast optimization
           Product: compiler-rt
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: evstupac at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16464
  --> https://llvm.org/bugs/attachment.cgi?id=16464&action=edit
test case

clang -O2 -S 2.c hangs on my x86
2.c (attached)

This is a regression introduced at r270135.

Potential fix:
http://reviews.llvm.org/D20847

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