[LLVMbugs] [Bug 11772] New: [AVX2] x86 isel crash with 16-wide vector and shl

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11772

             Bug #: 11772
           Summary: [AVX2] x86 isel crash with 16-wide vector and shl
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: matt at pharr.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 7885
  --> http://llvm.org/bugs/attachment.cgi?id=7885
test case

With top of tree and the attached test case, if I run:

% llc -mattr=+avx2 bugpoint-reduced-simplified.ll

I get this crash:

Stack dump:
0.    Program arguments: llc -mattr=+avx2 bugpoint-reduced-simplified.ll 
1.    Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.ll'.
2.    Running pass 'X86 DAG->DAG Instruction Selection' on function '@f_fu'
[1]    24920 segmentation fault  llc -mattr=+avx2
bugpoint-reduced-simplified.ll

This compiles correctly with AVX1.

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