[Bug 265809] clang never finishes on one particular C++ file (for science/psi4)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265809

--- Comment #12 from Dimitry Andric <dim@FreeBSD.org> ---
(In reply to John F. Carr from comment #11)
I don't see that, with llvm main (llvmorg-17-init-16183-g7b31a73ffe8) I still
get:

Assertion failed: ((ExtraInfo->getCascade(Intf->reg()) < Cascade ||
VirtReg.isSpillable() < Intf->isSpillable()) && "Cannot decrease cascade
number, illegal eviction"), function evictInterference, file
/home/dim/src/llvm/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp, line 505.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and
include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments:
/home/dim/ins/llvmorg-17-init-16183-g7b31a73ffe8/bin/clang -O2 -c hang.ll
1.      Code generation
2.      Running pass 'Function Pass Manager' on module 'hang.ll'.
3.      Running pass 'Greedy Register Allocator' on function
'@_Z26pars_info_add_int4_literalP11pars_info_tPKcm'

on your .ll test case. Maybe you have a 16.0 version with assertions disabled?

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