[LLVMbugs] [Bug 21382] New: Assertion failed: (MBB != &MF->front() && "Can't find reaching def for virtreg")

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21382

            Bug ID: 21382
           Summary: Assertion failed: (MBB != &MF->front() && "Can't find
                    reaching def for virtreg")
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: temp at expcov.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13249
  --> http://llvm.org/bugs/attachment.cgi?id=13249&action=edit
The LLVM assembly file which triggers the bug.

Attached testcase triggers an assertion in llc version 3.5.0

Assertion failed: (MBB != &MF->front() && "Can't find reaching def for
virtreg"), function MarkVirtRegAliveInBlock, file
~/llvm-3.5.0/lib/CodeGen/LiveVariables.cpp, line 114

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