[Bug rtl-optimization/118042] ICE: maximum number of generated reload insns per insn achieved (90) with -O1 -fexpensive-optimizations -favoid-store-forwarding -mavx10.1 -mprefer-vector-width=128 --param=store-forwarding-max-distance=256

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118042

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2024-12-16
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |ubizjak at gmail dot com

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 59875
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59875&action=edit
Proposed patch

TImode (and DImode on 32-bit targets) should be tied with other integer modes.
We allow HImode values in XMM registers, so on 64-bit targets, TImode can be
tied with HImode in both, integer and XMM registers. This will allow a register
in

(insn 228 230 227 2 (set (reg:TI 345)
        (subreg:TI (reg:HI 389) 0)) "/app/example.cpp":6:5 94 {*movti_internal}
     (expr_list:REG_DEAD (reg:HI 389)
        (nil)))

to be accessed directly.