[llvm] [Scalarizer] Test `*_with_overflow` intrinsics with min-bits (PR #127520)

[Jay Foad via llvm-commits]

jayfoad wrote:

Hi @inbelic, this new test shows a breakage introduced by #126815. After your patch this test hits an assertion failure:
```
opt: include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = llvm::VectorType, From = 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.
Stack dump:
0.	Program arguments: opt -passes=function(scalarizer<load-store;min-bits=16>,dce) -S
1.	Running pass "function(scalarizer,dce)" on module "<stdin>"
2.	Running pass "scalarizer" on function "call_v3i32"
 #0 0x0000000004028908 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (opt+0x4028908)
 #1 0x000000000402643e llvm::sys::RunSignalHandlers() (opt+0x402643e)
 #2 0x0000000004029131 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
 #3 0x000075c457a45330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
 #4 0x000075c457a9eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x000075c457a9eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x000075c457a9eb2c pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x000075c457a4527e raise ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x000075c457a288ff abort ./stdlib/abort.c:81:7
 #9 0x000075c457a2881b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x000075c457a3b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#11 0x0000000004143bea (opt+0x4143bea)
#12 0x00000000049addf4 (anonymous namespace)::Scatterer::operator[](unsigned int) Scalarizer.cpp:0:0
#13 0x00000000049aa142 (anonymous namespace)::ScalarizerVisitor::visit(llvm::Function&) Scalarizer.cpp:0:0
#14 0x00000000049a5419 llvm::ScalarizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (opt+0x49a5419)
```

https://github.com/llvm/llvm-project/pull/127520