[LLVMbugs] [Bug 17422] New: (llvm 3.3) SHLX64rm assertion in JIT codegen

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17422

            Bug ID: 17422
           Summary: (llvm 3.3) SHLX64rm assertion in JIT codegen
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: vtjnash at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

On the Haswell platform, it seems the SHLX64rm instruction causes an assertion
failure in the JIT. Unfortunately, I have not been able to make a reduced test
case.

Unknown immediate size
UNREACHABLE executed at
/home/jameson/julia/deps/llvm-3.3/lib/Target/X86/MCTargetDesc/X86BaseInfo.h:497!
  %RSI<def> = SHLX64rm %RBP, 1, %noreg, -120, %noreg, %RAX<kill>;
mem:LD8[FixedStack3]

In gdb, I see that TSFlags&X86II::ImmMask = 0, so I guess this means it is
missing some metadata from somewhere?

I'm not sure where to go from here, other than disabling the Haswell
instruction set.

(on a side note, llvm 3.3 seems to be missing from the bug version target list)

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