[AArch64][SVE] Error in bitcast on scalable vector #55114
Description
https://godbolt.org/z/7s6ThKrzY
define <vscale x 4 x i16> @bitcast_nxv1i64(<vscale x 1 x i64> %a) #0 {
%1 = bitcast <vscale x 1 x i64> %a to <vscale x 4 x i16>
ret <vscale x 4 x i16> %1
}Crashes with target triple = "aarch64-linux-gnu" -mattr=+sve2 -O3
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-assertions-trunk/bin/llc -o /app/output.s -x86-asm-syntax=intel -mattr=+sve2 -O3 <source>
1. Running pass 'Function Pass Manager' on module '<source>'.
2. Running pass 'AArch64 Instruction Selection' on function '@bitcast_nxv1i64'
#0 0x000056529c19902f PrintStackTraceSignalHandler(void*) Signals.cpp:0:0
#1 0x000056529c196a9c SignalHandler(int) Signals.cpp:0:0
#2 0x00007fa670c623c0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x143c0)
#3 0x00007fa67072f03b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4303b)
#4 0x00007fa67070e859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
#5 0x000056529c0db278 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x30db278)
#6 0x000056529c0db3e8 (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x30db3e8)
#7 0x000056529c13b165 (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x313b165)
#8 0x000056529c13b190 llvm::TypeSize::operator unsigned long() const (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x313b190)
#9 0x000056529c082eb1 llvm::DAGTypeLegalizer::PromoteIntRes_BITCAST(llvm::SDNode*) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3082eb1)
#10 0x000056529c0853ea llvm::DAGTypeLegalizer::PromoteIntegerResult(llvm::SDNode*, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x30853ea)
#11 0x000056529bffbe0f llvm::DAGTypeLegalizer::run() (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2ffbe0f)
#12 0x000056529bffcfc6 llvm::SelectionDAG::LegalizeTypes() (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2ffcfc6)
#13 0x000056529bf92703 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2f92703)
#14 0x000056529bf96263 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2f96263)
#15 0x000056529bf97998 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.960) SelectionDAGISel.cpp:0:0
#16 0x000056529b4d8ad6 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x24d8ad6)
#17 0x000056529b987526 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2987526)
#18 0x000056529b987879 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2987879)
#19 0x000056529b9881b9 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x29881b9)
#20 0x0000565299b3e918 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x0000565299a98bd7 main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0xa98bd7)
#22 0x00007fa6707100b3 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x240b3)
#23 0x0000565299b3531a _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0xb3531a)
Compiler returned: 139