[Bug rtl-optimization/104985] [12 Regression] ICE: SIGSEGV in undo_to_marker / adjust_reg_mode with -Os -frounding-math since r12-4767-g81342e95827f77

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104985

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 52696
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52696&action=edit
gcc12-pr104985-2.patch

A variant patch, also untested, but much smaller.
Yet another way would be to change do_SUBST_MODE into SUBST_MODE and just pass
the rtx instead of rtx *.