[Bug bootstrap/103974] [12 Regression] ICE in ira_flattening building libstdc++ with r12-6415-g01f3e6a40e72

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103974

--- Comment #1 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Created attachment 52157
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52157&action=edit
gzipped preprocessed (>1 MB) floating_to_chars.ii

Reproduce using the ungzipped file for example like so:

/tmp/X/gccobj/./gcc/cc1plus -fpreprocessed floating_to_chars.ii -march=v10
-quiet -dumpbase floating_to_chars.cc -dumpbase-ext .cc -O2 -std=gnu++17
-frandom-seed=floating_to_chars.lo