[LLVMbugs] [Bug 7774] New: undefined behavior at AlphaISelDAGToDAG.cpp, (116:28)

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sun Aug 1 13:21:10 PDT 2010


           Summary: undefined behavior at AlphaISelDAGToDAG.cpp, (116:28)
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: regehr at cs.utah.edu
                CC: llvmbugs at cs.uiuc.edu

This is clang 109870 on x86.

This command from "make check":

llc < /home/regehr/z/llvm-2/test/CodeGen/Alpha/2007-11-27-mulneg3.ll

shifts a 32-bit number by 63 places.  Same thing happens in the next line of

The fix is obvious.

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