LLVM doesn't support aggregate types in getTypeLegalizationCost

[dtcxzyw]

Reproducer: https://godbolt.org/z/53ze61ve3

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define void @_ZNSt8__detail8_ScannerIcEC2EPKcS3_NSt15regex_constants18syntax_option_typeESt6locale(ptr %this, i1 %call2, { i64, i64 } %0) {
entry:
  %cond = select i1 %call2, { i64, i64 } %0, { i64, i64 } zeroinitializer
  %cond.elt1 = extractvalue { i64, i64 } %cond, 1
  store i64 %cond.elt1, ptr %this, align 8
  ret void
}

> opt -passes="print<cost-model>" -S test.ll
Printing analysis 'Cost Model Analysis' for function '_ZNSt8__detail8_ScannerIcEC2EPKcS3_NSt15regex_constants18syntax_option_typeESt6locale':
Unknown type!
UNREACHABLE executed at /home/dtcxzyw/WorkSpace/Projects/compilers/llvm-project/llvm/lib/CodeGen/ValueTypes.cpp:590!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: bin/opt -passes=print<cost-model> reduced.ll
 #0 0x00007f6cb39e9300 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/libLLVMSupport.so.19.0git+0x1e9300)
 #1 0x00007f6cb39e670f llvm::sys::RunSignalHandlers() (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/libLLVMSupport.so.19.0git+0x1e670f)
 #2 0x00007f6cb39e6865 SignalHandler(int) Signals.cpp:0:0
 #3 0x00007f6cb3442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f6cb34969fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f6cb34969fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f6cb34969fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f6cb3442476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f6cb34287f3 abort ./stdlib/abort.c:81:7
 #9 0x00007f6cb3901e3e (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/libLLVMSupport.so.19.0git+0x101e3e)
#10 0x00007f6cb073f685 (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMCodeGen.so.19.0git+0x73f685)
#11 0x00007f6cb073f75c llvm::EVT::getEVT(llvm::Type*, bool) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMCodeGen.so.19.0git+0x73f75c)
#12 0x00007f6cb2809fef llvm::BasicTTIImplBase<llvm::X86TTIImpl>::getTypeLegalizationCost(llvm::Type*) const (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMX86CodeGen.so.19.0git+0x409fef)
#13 0x00007f6cb2815e35 llvm::BasicTTIImplBase<llvm::X86TTIImpl>::getCmpSelInstrCost(unsigned int, llvm::Type*, llvm::Type*, llvm::CmpInst::Predicate, llvm::TargetTransformInfo::TargetCostKind, llvm::Instruction const*) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMX86CodeGen.so.19.0git+0x415e35)
#14 0x00007f6cb28036ca llvm::TargetTransformInfoImplCRTPBase<llvm::X86TTIImpl>::getInstructionCost(llvm::User const*, llvm::ArrayRef<llvm::Value const*>, llvm::TargetTransformInfo::TargetCostKind) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMX86CodeGen.so.19.0git+0x4036ca)
#15 0x00007f6cae86cb75 llvm::TargetTransformInfo::getInstructionCost(llvm::User const*, llvm::ArrayRef<llvm::Value const*>, llvm::TargetTransformInfo::TargetCostKind) const (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMAnalysis.so.19.0git+0x46cb75)
#16 0x00007f6cae5580c8 llvm::CostModelPrinterPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMAnalysis.so.19.0git+0x1580c8)
#17 0x00007f6cb0c6ed96 llvm::detail::PassModel<llvm::Function, llvm::CostModelPrinterPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMPasses.so.19.0git+0x6ed96)
#18 0x00007f6cae1188b1 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMCore.so.19.0git+0x3188b1)
#19 0x00007f6cb24a5556 llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMX86CodeGen.so.19.0git+0xa5556)
#20 0x00007f6cae1175ab llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMCore.so.19.0git+0x3175ab)
#21 0x00007f6cb24a6946 llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMX86CodeGen.so.19.0git+0xa6946)
#22 0x00007f6cae115421 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/../lib/libLLVMCore.so.19.0git+0x315421)
#23 0x00007f6cb3d674c5 llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::ArrayRef<std::function<void (llvm::PassBuilder&)>>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool, bool) (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/libLLVMOptDriver.so.19.0git+0x234c5)
#24 0x00007f6cb3d72096 optMain (/home/dtcxzyw/WorkSpace/Projects/compilers/LLVM/llvm-build/bin/../lib/libLLVMOptDriver.so.19.0git+0x2e096)
#25 0x00007f6cb3429d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#26 0x00007f6cb3429e40 call_init ./csu/../csu/libc-start.c:128:20
#27 0x00007f6cb3429e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#28 0x000055d247b26095 _start (bin/opt+0x1095)
Aborted (core dumped)

See also dtcxzyw/llvm-opt-benchmark#355.
cc @goldsteinn