[LLVMbugs] [Bug 338] NEW: llc miscompiles Obsequi on x86

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=338

           Summary: llc miscompiles Obsequi on x86
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: X86 Backend
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: criswell at uiuc.edu


The llc program miscompiles the LLVM bytecode generated from Obsequi.  Bugpoint
has reduced the miscompilation to the l377__2E_score_move_8 function.

I will attach the LLVM assembly that is being miscompiled at the LLVM bytecode
that bugpoint considers to be safe.

FYI, the output from bugpoint:
*** The following function is being miscompiled:  l377__2E_score_move_8
<cbe><gcc>You can reproduce the problem with the command line: 
  llc bugpoint.test.bc -o bugpoint.test.bc.s
  gcc ./bugpoint.safe.bc.cbe.c.so bugpoint.test.bc.s -o bugpoint.test.bc.exe -Wl,-R.
  bugpoint.test.bc.exe
The shared object was created with:
  llc -march=c bugpoint.safe.bc -o temporary.c
  gcc -xc temporary.c -O2 -o ./bugpoint.safe.bc.cbe.c.so -shared
-fno-strict-aliasing



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