[LLVMbugs] [Bug 8612] New: Another regscavenger assertion

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8612

           Summary: Another regscavenger assertion
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru
                CC: llvmbugs at cs.uiuc.edu


Consider the attached testcase. We have:

$ ./llc bugpoint-reduced-simplified.ll 
Assertion failed: ((!EarlyClobberRegs.test(Reg) ||
MI->isRegTiedToDefOperand(i)) && "Using an early clobbered register!"),
function forward, file
/Users/asl/Projects/llvm/src-git/lib/CodeGen/RegisterScavenging.cpp, line 205.
0  llc               0x000000010099bc99 PrintStackTrace(void*) + 38
1  llc               0x000000010099c254 SignalHandler(int) + 254
2  libSystem.B.dylib 0x00007fff84aec35a _sigtramp + 26
3  libSystem.B.dylib 0x000000010262e780 _sigtramp + 2108957760
4  llc               0x000000010002bca2 raise + 27

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