<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/59510>59510</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            SVE: VLA: LLVM ERROR: Invalid size request on scalable vector
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    Getting an ICE from foldLoadsRecursive(), possibly due to the half width i8 vector, reduced with bugpoint.

godbolt: https://godbolt.org/z/ovdWKevb1

```
define dso_local void @func(ptr nocapture readonly %red.arg, ptr nocapture readonly %alpha.arg) {
L.entry:
  br label %L.B0007

L.B0007: ; preds = %L.B0007, %L.entry
  %addr.0 = phi ptr [ undef, %L.entry ], [ %6, %L.B0007 ]
  %0 = load <vscale x 8 x i8>, ptr %alpha.arg, align 1
  %1 = zext <vscale x 8 x i8> %0 to <vscale x 8 x i32>
  %2 = shl <vscale x 8 x i32> %1, shufflevector (<vscale x 8 x i32> insertelement (<vscale x 8 x i32> poison, i32 poison, i32 0), <vscale x 8 x i32> poison, <vscale x 8 x i32> zeroinitializer)
  %3 = load <vscale x 8 x i8>, ptr %red.arg, align 1
  %4 = zext <vscale x 8 x i8> %3 to <vscale x 8 x i32>
  %5 = or <vscale x 8 x i32> %2, %4
  store <vscale x 8 x i32> %5, ptr %addr.0, align 1
  %6 = getelementptr i8, ptr %addr.0, i64 64
 br label %L.B0007
}

opt -O3 reduced.ll -mcpu=neoverse-v1

LLVM ERROR: Invalid size request on a scalable vector.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-trunk/bin/opt -o /app/output.s -S -O3 -mcpu=neoverse-v1 <source>
 #0 0x00005631c085fc8f llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/opt+0x3485c8f)
 #1 0x00005631c085d714 SignalHandler(int) Signals.cpp:0:0
 #2 0x00007f489c1e2420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #3 0x00007f489bcaf00b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b)
 #4 0x00007f489bc8e859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #5 0x00005631bddeee94 llvm::UniqueStringSaver::save(llvm::StringRef) (.cold) StringSaver.cpp:0:0
 #6 0x00005631c07a663e (/opt/compiler-explorer/clang-trunk/bin/opt+0x33cc63e)
 #7 0x00005631c07ff51d (/opt/compiler-explorer/clang-trunk/bin/opt+0x342551d)
 #8 0x00005631c07ff544 llvm::TypeSize::operator unsigned long() const (/opt/compiler-explorer/clang-trunk/bin/opt+0x3425544)
 #9 0x00005631c148ecf1 foldLoadsRecursive(llvm::Value*, LoadOps&, llvm::DataLayout const&, llvm::AAResults&) AggressiveInstCombine.cpp:0:0
#10 0x00005631c1497d64 llvm::AggressiveInstCombinePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x40bdd64)
#11 0x00005631c0bd4eb6 llvm::detail::PassModel<llvm::Function, llvm::AggressiveInstCombinePass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x37faeb6)
#12 0x00005631be2f0ce1 llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0xf16ce1)
#13 0x00005631bf5d4cd5 llvm::CGSCCToFunctionPassAdaptor::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x21facd5)
#14 0x00005631be2e6436 llvm::detail::PassModel<llvm::LazyCallGraph::SCC, llvm::CGSCCToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-trunk/bin/opt+0xf0c436)
#15 0x00005631bf5cd3e4 llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x21f33e4)
#16 0x00005631c0160886 llvm::detail::PassModel<llvm::LazyCallGraph::SCC, llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x2d86886)
#17 0x00005631bf5d107e llvm::DevirtSCCRepeatedPass::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x21f707e)
#18 0x00005631c0160836 llvm::detail::PassModel<llvm::LazyCallGraph::SCC, llvm::DevirtSCCRepeatedPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x2d86836)
#19 0x00005631bf5ce57b llvm::ModuleToPostOrderCGSCCPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x21f457b)
#20 0x00005631c016879d llvm::ModuleInlinerWrapperPass::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x2d8e79d)
#21 0x00005631c0bd1df6 llvm::detail::PassModel<llvm::Module, llvm::ModuleInlinerWrapperPass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x37f7df6)
#22 0x00005631c000d329 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x2c33329)
#23 0x00005631bdef8406 llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/opt+0xb1e406)
#24 0x00005631bde04ecb main (/opt/compiler-explorer/clang-trunk/bin/opt+0xa2aecb)
#25 0x00007f489bc90083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#26 0x00005631bdeea87e _start (/opt/compiler-explorer/clang-trunk/bin/opt+0xb1087e)
Compiler returned: 139
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWltv2zjT_jXKDRGDInW8yIXj1PsFm6JB0u1eGpQ4svmVJrUk5cb59S8o2bXkQ9Zt8mLfbQukTSTO8ZmZR5RpZq2YK4CrIL4O4psL1riFNlfGltq5JVMS1heF5uur38A5oeaIKXQ7eYcqo5eo0pLfacbtA5SNsWIFAckCkgdkgmptrSjkGvEGkNPILQAtmKzQF8HdAokMraB02nhZA7wpgaMvwi1Q0cxrLZQbBfgmwOPu_7nmhZYuoGO0cK62AR0HZBqQ6WZhpM08INPngEz1iv_5O6yKsK8fJHjz015yqIQCxK2eSV0yiVZacBREuGpUGZCsdgYpXbLaNQaQAca1kmsUkNgAHzHva4JOCzFZL1gnlqMgve6c3o1AObP2obfXCBUGSVaA9Dp3o2uMcdoPenuLjlFAr1FtgFsU0Ju-OJl0V53pjV0fAudmhFvpeiHaWIP4GjWKQzVUQkF8096Jr_3d5Otq66Bd3ZntLErNOAroZGVLJgE9oQw9IZEF9N0WlyEIE8SkmCsU9iyFraVneHLHLXXenD5cpcQ72lkirSW7kCdEW28-CLtoqkpC13fIt-pxeaEsGAcSlqDcC3K1FlYrb1lQsneFN2Pwt6onBJ7BaKGEE0yKZzDe2i5jen4Vev16WIPojBrQs2oQt5Y8qidLQDaNFW3VrNMGXlCI-83UtvPxLJLW9xy2FfMqIjuqLJIIJdsATk9fetMfQ107dPmBbllqJCW6XJZ1E9AbBXoFxsLlasA2d3ef3qN3Dw8fHvzs3qoVk4IjK549TfzVgHVIK8SQz5sVEjZUuGG8-7t348d3yDbFUjjEPCEiA7U2zpdij_6EWzTFqNTLgEylXG1_XdZG_z-ULiBTYW0DNiBTxBRHQpWy4dDScWmYXaCClZ-dYSVs3D86Vn5GvFnWX5kKjwKc3xs9N2yJmJk3Hmbb8hKZ6tp7KfWyFhLMJTzVUhvfsdNSMjW_dKZRnwMyLYTqpNGl9nqsrv114-rGjSy6fGxBPoKsbxGrG1PCrucCQjHCTxhjHCc0LHEWV2VWoRYCOg7o2K5t98e9Ecq1SX30WQYk2wkZ9mWmrTPAlgFpmU8o15K2f459e2oBucZPNMriMqt2IxsQGu4Fy9MwQo9irpj8P6a49Eazje_uth2Vta8Abv99NUQ2htIqyvIyBBIRjGYzA-00zYzbhC5FEZDpU5bMkuhSCtU8Xc5V0y3UbuGfViOr_VRc46cwiggexEv7boqSVRgXyDBh4Qz7pbectJYjinExsBwNLWeQxTlihT4r8p5lQrI4H1iOexgXnANAHvUa4g8l_mrg0Rmh5o9sBWbTJ2w17IlO4sE_Jts-GJVa8rYuO9XjtUkGRU5ZklB4XSfRskwoDLJMh06qKg75K9uVxHHIB06yAydRH8qP6xoexTN0V7oGw_wTtVHtXpIjqdW82wmiUivrXh9fFA3iy_vxhVEGZRUe343ugv7EZAMBGfsp92IfaruZ-Z3MDXPsjq1147rADwTG4wewjXSdao7G87kB633dKusmelkIBYfd4RkAD2POU570MT1q6Z7ZDYuZRg2ymTaqdMJvIfYjVEyurbDvmWJz3-STI0p-i5C8luciXHCe7ArjkxzyXMEjKJJecBwcE3LDy8za95qDPB7iMKmT4AzE7g1YMCvgHQhgvw8a__M_ijlNKwZFMsCc9HkPSIVLCN8A81b2pYS-F9ufrGRVmJQQDipG-xWrYh6VPO7FNvntcTL5qLdh-EKMOav9y_LRJO_Y83rCpPzNsHqxeYhNJt-U8ikTff2hDEm28LwoM1htE_uj5sxBR6NvAC8JK1byeIBvNJwISCL6bSx0DhwvVOmtOvy7q_LKkpyapp-60SpcRnTIvPFwjktOITqDQc_B4Fdb_EvagoQVpTDcBQ1fBMIEZ9nb888P2F2_ePNHHBCeJVk2JM50bwMU4hT6r2GwEsY9TiYPUANzwE-_B_3c0IZVilMYQJsdcM9_Ye9zvEC_xvdH7DE_vnv7nnxv3wNxWvTCeK95I-GjvtfWfTAcTBvX377GdGrfBOtG5U3e00hYRXFa9BMleG-YsjTnB4neKikUmD8Nq2swp6nqn86PZ5DmfJDf_sc1Ia--jSy2OU3OQeWt-GGHyqmJ_YehpmmV8mowM4QMoMaYU5KfsZs7BvC_GhtSUkpJPsBm8HkIhyqLcL8NTdO-Xd-LGnxPnfq0_rAHD5L8yMwc3HtWLlo742Ord6IwzKxvVaVvl7U8lNJafmhPraZCHjHyquUT6YyNYWt_t1-VFhPZzIU6ePjp2s2c1pvR7fz9LhR_SeoTGFEJMFu5wq-c_ft1TVGEEOHhvETDnsARlAVaMqFe5YgRBuWQ4-PhgVSOcUbRbCZFUc6sY8bNel7PPZyKcEYHXpJhOsCyFFBn_5XI4ay3A5xs1JEB1xgFPKBjFNJ871swF_yK8pzm7AKuwiTFeZLFNL9YXCVpHhaQJHEBeVywIsvTpKqiKiRREdEkvRBXBBMSkpCSMI5pPopJTkmaJ5ikURISFkQYlkzIke-zkTbzi_YA-irO4xBftAfutv2yESEKvqB2MSAkiG8uzJXXuSyauQ0iLIV1dmfFCSfh6vGTZzX06c53LDrvnH3vlP2iMfLq-0_R2zz-EwAA__8OH0vw">