[WebAssembly] llc (assertion trunk) crashed at -O0 with -msimd128 enabled

[XChy]

Reproducer: https://godbolt.org/z/9KvoMqd1f
Testcase:

target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
target triple = "wasm32-unknown-wasi"

define i8 @func_1(<4 x i32> %0) #0 {
entry:
  %conv = trunc <4 x i32> %0 to <4 x i8>
  br label %cond.true

cond.true:                                        ; preds = %entry
  %vecext = extractelement <4 x i8> %conv, i32 0
  ret i8 %vecext
}

attributes #0 = { "target-features"="+simd128" }

llc output:

llc: /root/llvm-project/llvm/include/llvm/Support/Casting.h:572: decltype(auto) llvm::cast(From*) [with To = llvm::IntegerType; From = const llvm::Type]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
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 -O0 <source>
1.	Running pass 'Function Pass Manager' on module '<source>'.
2.	Running pass 'WebAssembly Instruction Selection' on function '@func_1'
 #0 0x0000000004184888 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x4184888)
 #1 0x0000000004181734 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
 #2 0x00007f9875242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x00007f98752969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #4 0x00007f9875242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #5 0x00007f98752287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #6 0x00007f987522871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #7 0x00007f9875239e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #8 0x00000000021c163d (anonymous namespace)::WebAssemblyFastISel::fastSelectInstruction(llvm::Instruction const*) WebAssemblyFastISel.cpp:0:0
 #9 0x0000000003db94fb llvm::FastISel::selectInstruction(llvm::Instruction const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3db94fb)
#10 0x0000000003f16798 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3f16798)
#11 0x0000000003f18025 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3f18025)
#12 0x0000000003f03a2f llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3f03a2f)
#13 0x000000000306a5c9 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#14 0x00000000036b8dd6 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36b8dd6)
#15 0x00000000036b9181 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36b9181)
#16 0x00000000036b99ef llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36b99ef)
#17 0x00000000008f9af3 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#18 0x00000000007c6926 main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x7c6926)
#19 0x00007f9875229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#20 0x00007f9875229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#21 0x00000000008eef35 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x8eef35)
Program terminated with signal: SIGSEGV
Compiler returned: 139

[llvmbot]

@llvm/issue-subscribers-backend-webassembly

Author: Hongyu Chen (XChy)

Reproducer: https://godbolt.org/z/9KvoMqd1f Testcase: ```llvm target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20" target triple = "wasm32-unknown-wasi"

define i8 @func_1(<4 x i32> %0) #0 {
entry:
%conv = trunc <4 x i32> %0 to <4 x i8>
br label %cond.true

cond.true: ; preds = %entry
%vecext = extractelement <4 x i8> %conv, i32 0
ret i8 %vecext
}

attributes #0 = { "target-features"="+simd128" }

llc output:

llc: /root/llvm-project/llvm/include/llvm/Support/Casting.h:572: decltype(auto) llvm::cast(From*) [with To = llvm::IntegerType; From = const llvm::Type]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
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 -O0 <source>

1. Running pass 'Function Pass Manager' on module '<source>'.
2. Running pass 'WebAssembly Instruction Selection' on function '@func_1'
   #0 0x0000000004184888 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x4184888)
   #1 0x0000000004181734 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
   #2 0x00007f9875242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
   #3 0x00007f98752969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
   #4 0x00007f9875242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
   #5 0x00007f98752287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
   #6 0x00007f987522871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
   #7 0x00007f9875239e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
   #8 0x00000000021c163d (anonymous namespace)::WebAssemblyFastISel::fastSelectInstruction(llvm::Instruction const*) WebAssemblyFastISel.cpp:0:0
   #9 0x0000000003db94fb llvm::FastISel::selectInstruction(llvm::Instruction const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3db94fb)
   #10 0x0000000003f16798 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3f16798)
   #11 0x0000000003f18025 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3f18025)
   #12 0x0000000003f03a2f llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3f03a2f)
   #13 0x000000000306a5c9 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
   #14 0x00000000036b8dd6 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36b8dd6)
   #15 0x00000000036b9181 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36b9181)
   #16 0x00000000036b99ef llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36b99ef)
   #17 0x00000000008f9af3 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
   #18 0x00000000007c6926 main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x7c6926)
   #19 0x00007f9875229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
   #20 0x00007f9875229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
   #21 0x00000000008eef35 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x8eef35)
   Program terminated with signal: SIGSEGV
   Compiler returned: 139

</details>

[badumbatish]

just for a bit more context, i guess -O0 must have enabled fast isel for web assembly

(lldb) f
frame #4: 0x000000010011fa40 llc`decltype(auto) llvm::cast<llvm::IntegerType, llvm::Type const>(Val=0x000000015300aa00) at Casting.h:572:3
   569
   570  template <typename To, typename From>
   571  [[nodiscard]] inline decltype(auto) cast(From *Val) {
-> 572    assert(isa<To>(Val) && "cast<Ty>() argument of incompatible type!");
   573    return CastInfo<To, From *>::doCast(Val);
   574  }
   575
(lldb) p *Val
(const llvm::Type) {
  Context = 0x000000016fdfe670
  ID = FixedVectorTyID
  SubclassData = 0
  NumContainedTys = 1
  ContainedTys = 0x000000015300aa18
}
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = hit program assert
    frame #0: 0x0000000196141388 libsystem_kernel.dylib`__pthread_kill + 8
    frame #1: 0x000000019617a88c libsystem_pthread.dylib`pthread_kill + 296
    frame #2: 0x0000000196083c60 libsystem_c.dylib`abort + 124
    frame #3: 0x0000000196082eec libsystem_c.dylib`__assert_rtn + 284
  * frame #4: 0x000000010011fa58 llc`decltype(auto) llvm::cast<llvm::IntegerType, llvm::Type const>(Val=0x000000015c012a00) at Casting.h:572:3
    frame #5: 0x000000010011f7e0 llc`llvm::Type::getIntegerBitWidth(this=0x000000015c012a00) const at DerivedTypes.h:100:10
    frame #6: 0x000000010011b248 llc`(anonymous namespace)::WebAssemblyFastISel::selectTrunc(this=0x0000600002330750, I=0x0000600003334020) at WebAssemblyFastISel.cpp:996:60
    frame #7: 0x0000000100117efc llc`(anonymous namespace)::WebAssemblyFastISel::fastSelectInstruction(this=0x0000600002330750, I=0x0000600003334020) at WebAssemblyFastISel.cpp:1423:12
    frame #8: 0x000000010297e238 llc`llvm::FastISel::selectInstruction(this=0x0000600002330750, I=0x0000600003334020) at FastISel.cpp:1597:7
    frame #9: 0x0000000102c069bc llc`llvm::SelectionDAGISel::SelectAllBasicBlocks(this=0x000000015b205820, Fn=0x0000600002a3c008) at SelectionDAGISel.cpp:1792:21
    frame #10: 0x0000000102c04e70 llc`llvm::SelectionDAGISel::runOnMachineFunction(this=0x000000015b205820, mf=0x000000015c825e00) at SelectionDAGISel.cpp:627:3
    frame #11: 0x00000001001aeae4 llc`(anonymous namespace)::WebAssemblyDAGToDAGISel::runOnMachineFunction(this=0x000000015b205820, MF=0x000000015c825e00) at WebAssemblyISelDAGToDAG.cpp:59:30
    frame #12: 0x0000000102c03778 llc`llvm::SelectionDAGISelLegacy::runOnMachineFunction(this=0x0000600000d28040, MF=0x000000015c825e00) at SelectionDAGISel.cpp:390:20
    frame #13: 0x00000001013be1c0 llc`llvm::MachineFunctionPass::runOnFunction(this=0x0000600000d28040, F=0x0000600002a3c008) at MachineFunctionPass.cpp:108:10
    frame #14: 0x0000000101d0c950 llc`llvm::FPPassManager::runOnFunction(this=0x000000015b204b20, F=0x0000600002a3c008) at LegacyPassManager.cpp:1398:27
    frame #15: 0x0000000101d12a04 llc`llvm::FPPassManager::runOnModule(this=0x000000015b204b20, M=0x000000015b1051f0) at LegacyPassManager.cpp:1444:16
    frame #16: 0x0000000101d0d148 llc`(anonymous namespace)::MPPassManager::runOnModule(this=0x000000015b204080, M=0x000000015b1051f0) at LegacyPassManager.cpp:1513:27
    frame #17: 0x0000000101d0cd20 llc`llvm::legacy::PassManagerImpl::run(this=0x000000015c808800, M=0x000000015b1051f0) at LegacyPassManager.cpp:531:44
    frame #18: 0x0000000101d12dd0 llc`llvm::legacy::PassManager::run(this=0x000000016fdfdb28, M=0x000000015b1051f0) at LegacyPassManager.cpp:1640:14
    frame #19: 0x0000000100004a5c llc`compileModule(argv=0x000000016fdfee28, Context=0x000000016fdfe670) at llc.cpp:831:8
    frame #20: 0x0000000100002b64 llc`main(argc=7, argv=0x000000016fdfee28) at llc.cpp:446:22
    frame #21: 0x0000000195ddab98 dyld`start + 6076

i guess there is a instruction of vector type that's being fed into the selectTrunc