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

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Sep 30 20:40:22 PDT 2013


            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

Unknown immediate size
UNREACHABLE executed at
  %RSI<def> = SHLX64rm %RBP, 1, %noreg, -120, %noreg, %RAX<kill>;

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)

You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20131001/cb6b70b5/attachment.html>

More information about the llvm-bugs mailing list