[FFmpeg-trac] #9049(avfilter:new): astats undefined behaviour on float pcm having peaks much greater than 1.0

[FFmpeg]

#9049: astats undefined behaviour on float pcm having peaks much greater than 1.0
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             Reporter:  danadam       |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  important     |                Component:  avfilter
              Version:  git-master    |               Resolution:
             Keywords:  astats crash  |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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Comment (by cus):

 It crashes here with GCC 7.5.0.

 {{{
    0x00000000006b53af <+8399>:  mulsd  xmm0,xmm8
    0x00000000006b53b4 <+8404>:  cvttsd2si ebx,xmm0
    0x00000000006b53b8 <+8408>:  cmp    ebx,0x1fff
    0x00000000006b53be <+8414>:  cmovg  ebx,r11d
    0x00000000006b53c2 <+8418>:  cmp    eax,ebx
    0x00000000006b53c4 <+8420>:  cmovl  eax,ebx
    0x00000000006b53c7 <+8423>:  movsxd rbx,ebx
 => 0x00000000006b53ca <+8426>:  add    DWORD PTR [r12+rbx*4+0xf8],0x1
 }}}
 {{{
 rax            0x0                 0
 rbx            0xffffffff80000000  -2147483648
 r11            0x1fff              8191
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/9049#comment:5>
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