[LLVMbugs] [Bug 2376] New: std:: vector subscript out of range error in LocalSpiller when rewriting function

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2376

           Summary: std::vector subscript out of range error in LocalSpiller
                    when rewriting function
           Product: tools
           Version: trunk
          Platform: PC
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: llc
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: spudder at blueyonder.co.uk
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1672)
 --> (http://llvm.org/bugs/attachment.cgi?id=1672)
Bugpoint reduced testcase 

Hi,

Compiling the attached testcase with llc on Windows Vista - SVN revision 51603,
built using VS 2005 - triggers a debug assertion from inside the MSVC++
standard library when attempting to access an element of a vector that doesn't
exist.

Running llc through the debugger, the code triggering this error is in
VirtRegMap.cpp:InvalidateKills

[snip]

if (KillOps[Reg] == &MO) {
  RegKills.reset(Reg);
  KillOps[Reg] = NULL;
}

[/snip]

Here, the value of "Reg" is 1061, but the size of KillOps is only 112.


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