[llvm-bugs] [Bug 33592] New: [mc][gfx9][disassembler] Failed to decode v_mad_mix* opcodes

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33592

            Bug ID: 33592
           Summary: [mc][gfx9][disassembler] Failed to decode v_mad_mix*
                    opcodes
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: dpreobrazhensky at luxoft.com
                CC: llvm-bugs at lists.llvm.org

Disassembler failed to decode v_mad_mix* opcodes.

An example of failed test:

    0x05,0x00,0xa0,0xd3,0x01,0x00,0xfd,0x07

Expected result:

    v_mad_mix_f32 v5, s1, 0, v255 

Actual result:

    Assertion failed: idx < size(), file
D:\__LLVM_GIT_MASTER\llvm\include\llvm/ADT/SmallVector.h, line 153
    Wrote crash dump file "E:\TMP\llvm-mc.exe-698d5b.dmp"
    #0 0x006230b9 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x2d30b9)
    #1 0x016f15db (C:\Windows\system32\ucrtbased.dll+0xb15db)
    #2 0x016f2ba2 (C:\Windows\system32\ucrtbased.dll+0xb2ba2)
    #3 0x016f6fe4 (C:\Windows\system32\ucrtbased.dll+0xb6fe4)
    #4 0x016f55ca (C:\Windows\system32\ucrtbased.dll+0xb55ca)
    #5 0x016f777a (C:\Windows\system32\ucrtbased.dll+0xb777a)
    #6 0x0040d493 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0xbd493)
    #7 0x003b6bdd (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x66bdd)
    #8 0x008e9863 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x599863)
    #9 0x008e5f89 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x595f89)
    #10 0x008e6bca (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x596bca)
    #11 0x004e4f8f (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x194f8f)
    #12 0x004c5b1c (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x175b1c)
    #13 0x003c54b4 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x754b4)
    #14 0x003c510a (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x7510a)
    #15 0x0039a8ac (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x4a8ac)
    #16 0x008e05ee (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x5905ee)
    #17 0x008e0470 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x590470)
    #18 0x008e030d (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x59030d)
    #19 0x008e0608 (D:\__LLVM_GIT_MASTER\build\Debug\bin\llvm-mc.exe+0x590608)
    #20 0x75c5336a (C:\Windows\syswow64\kernel32.dll+0x1336a)
    #21 0x77eb9902 (C:\Windows\SysWOW64\ntdll.dll+0x39902)
    #22 0x77eb98d5 (C:\Windows\SysWOW64\ntdll.dll+0x398d5)

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