<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/159116>159116</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [PowerPC] crashed at -O1: LLVM ERROR: Found 1 machine code errors.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            backend:PowerPC,
            crash-on-valid
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          XChy
      </td>
    </tr>
</table>

<pre>
    Reproducer: https://godbolt.org/z/dW4Mn4xvv
Testcase:
```llvm
define i32 @func_1(i64 %vecext24) {
entry:
  br label %asm.fallthrough

asm.fallthrough: ; preds = %cond.end, %entry
  %BS_VAR_11.2 = phi i8 [ %conv8, %cond.end ], [ 0, %entry ]
  %conv7 = sext i8 %BS_VAR_11.2 to i32
  %rem = srem i32 %conv7, 7
  %conv8 = trunc i32 %rem to i8
 %cmp.scalar = icmp slt i32 %conv7, 0
  %vecins = insertelement <4 x i16> zeroinitializer, i16 0, i64 %vecext24
  %vecinit26 = insertelement <32 x i8> zeroinitializer, i8 0, i64 0
  %conv58 = sext <32 x i8> %vecinit26 to <32 x i32>
  %vecext59 = extractelement <32 x i32> %conv58, i64 0
  %cmp122 = icmp ult i32 %vecext59, 1
  br i1 %cmp122, label %cond.true, label %cond.end

cond.true:                                        ; preds = %asm.fallthrough
  %vecext124 = extractelement <4 x i16> %vecins, i64 0
 %conv125 = sext i16 %vecext124 to i32
  br label %cond.end

cond.end: ; preds = %cond.true, %asm.fallthrough
 %cond = phi i32 [ %conv125, %cond.true ], [ 1, %asm.fallthrough ]
  store i32 %cond, ptr null, align 4
  br label %asm.fallthrough
}
```

Output:
```
LLVM ERROR: Found 1 machine code errors.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/llc -o /app/output.s -x86-asm-syntax=intel -O1 <source>
1.      Running pass 'Function Pass Manager' on module '<source>'.
2.      Running pass 'PowerPC MI Peephole Optimization' on function '@func_1'
 #0 0x00000000040de748 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x40de748)
 #1 0x00000000040db5f4 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
 #2 0x000077e66bc42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x000077e66bc969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #4 0x000077e66bc42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #5 0x000077e66bc287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #6 0x00000000007b44ff llvm::json::operator==(llvm::json::Value const&, llvm::json::Value const&) (.cold) JSON.cpp:0:0
 #7 0x000000000311c0af (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x311c0af)
 #8 0x00000000031342b6 llvm::MachineFunction::verify(llvm::Pass*, char const*, llvm::raw_ostream*, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x31342b6)
 #9 0x0000000001c73219 (anonymous namespace)::PPCMIPeephole::runOnMachineFunction(llvm::MachineFunction&) PPCMIPeephole.cpp:0:0
#10 0x0000000002ff7209 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#11 0x000000000362ea98 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x362ea98)
#12 0x000000000362ecd1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x362ecd1)
#13 0x000000000362f53f llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x362f53f)
#14 0x00000000008eafcd compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#15 0x00000000007bc2e6 main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x7bc2e6)
#16 0x000077e66bc29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#17 0x000077e66bc29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#18 0x00000000008e1425 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x8e1425)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJy8WFtv2zoS_jX0C2FDou4PflAuPttFswmSg-6-GRRFyzylSIGkXKe_fjGUXMmOCyS7wQlcVBZnvvnmStLUWtEoztcouUHJ3YL2bq_N-j-3-9dFpevX9TPvjK57xg2KSrx3rrMoKhHZILJpdF1p6VbaNIhsfiKyqf8dP6j4eDigoPyTW8eo5SAelCgNho-UhxYFZc13QnEsIoJRHOx6xbYhIrlIY4xIcuCMHx2JESkwym5QUHLlzOsAhXFlsKQVlyBKbbvaUSnd3ui-2YOpoLx8GZUYRTe4M7y2GEV3oMi0qldc1YjcwtfBAKAjkty8bL-Vz9swXBEv3u0FFjlGyc2oechHtRMKRsmdf5Xc4GAO6RdGWFDMPKDlR-cRz205DRE5iRveDsLw4CM1QgB-NgfNvZwzvWInQdABuBzkQKztVpZRSY2XFaztsJXuDW5wwj1wJtQQLaEsN45L3nLlMIpuY3zEIkxRdI9_cqOFEk5QKX5yAxAiTIcYXGZzjiwcSa-DRwTQ89-B5xN2MI9Bkk-RPUc5M-n0tBoRFN3PWPGjSwqPwo_OUPaWldeYLL4l0nYhIVOE-ynCJ3zQCU9lLMJJCxZ-lbWvK2d6_vYt1Kyv8kkmKvE7_960wdv-mUUjJPFvwjGrgF-1chaNMUYhSWYFH6bn2LN6n_f0FTfh22-7-BSn6-6MUlMjQz6mTg5JMu9lwJo3c3gd-FdbW6cNn3WRnyedM1j1UsIzlaJROH7P4Mru5pNy8P6xd13vLoYoCsqvX7894Pvn58dniMtG96rGIW4p28NcZbrmmBujjV2hoHz6el--3GPbV61wmOKqb7DhnTYOUnAx1YXb99WK6RaRjZ_Ww3_Lzui_OHOIbIS1PbeIbDBVNRaKyb7m2O05ZobaPa4o-w4Fw8d160zPnNDKgjlz2lK8RtU3wPDFUfYd133bDa4GKxQUT0Y3hraYmqaHwrO-BMhGd8CC6bYTkpslP3ZSGxgPGyapapbUwkgBe0uYid8R2VRCeT8YXmqAoF0HQD64K4uXxzxdUtsu7aty9IiiO6Ecl3j5GEK1W90bxodhEQKz514poRrcUWsxItmmV95B_AQvHqiiDfDJsFa41XUvOUidIZEM_CbX0J70D26ebvHDF_zEebfXkuPHzolW_KRgZQTenYwC9LSJZkPRRwEOjsHpLw5qnsU59gmNShSV9tUOD09GKOfj_yfkDJF8EjL0x1ZbZzhtEUl9gyvnd2WS_5-JQOQmOI60EClG0uEF6SrZxfhFNIrKf1BVSwDPPYdbbEUj1E5vHSIlfD9oUfvHYtSwK9ZBPQX-32CAjAayjKdpxWKSkGD0RooKkc0xT7dpvJRC9cdlo_phga2sXqUDZ1CZGEfngEVa7Bju3N5wWm-_Cyk_hu71J_T4km6cpbix3r2P0o6zdAJOzoFJnu0iTCsYCR-C9YoTbDrPX5BVcbzbzYruL6vV8KQ7bqjTBkV38JkX3ST0jcoehpmybiy_90j56lwxLWt4_ufL47-u1EE2JxqFIQvo7rOqeoSbopKfG4tiUqUzVx6GqX0aIsPLAzdi93oWGBguY62zPTUnl8vzwJz1rF-rtJYQCi__eU56NyYni7mTIcsiEvpMUKXVa6t7ixVtue38jClGj55uH76cZtxIv1eP6jIi8yi8WfMpP0O6yDfMlbNpSHa7jATF71PgIz3RucrjggDUXEeNW8FswFfwrpA6m3ZRSjgt5iN68wR6p93kw3Q-JcsDqSHLQJlcUmZ1-A7KD34TPM_j-Oqz6bI6nOhGF3R3STSfR5I3lL1O3TUS_9J28hf5v4M00JpIx2dDNOd0x2o8GvgVSJgAvr8v2h8OhrdaOX48TUMp2ZXaSy4mNSM8xS0V6rPcGiAnr9KLHaeoiw_uvF5lAswuAXkc4O0WdLbWUeO2M3febYLHMxP5RSbCmCR4AP-sMA2gg8nTgddx0wpFHa_xD-H2eNjv4fT78uWPl_s_vqGgvB1NYsNdbxT396MwKub3hEW9juoiKuiCr8MsyYMoj4J0sV9HJElpmhRZldWk4DzkVVClWZIWlMdRTBdiTQKSBEWYhkmSk3QVsDiK6izgJCryPIIDJ2-pkCuovJU2zcLfCtZhUoRhuvDXHOt_ViIE7gPDBW482SJ_20WE-PvCUqvlgUo4vBGU3C3M2t83qr6xKA6ksM5OVpxw0v9cdYJK7oZbB68xdXBghzi8_3a06I1c_-83oNHdw5r8NwAA__8CG8Hn">