On Sun, Feb 4, 2024 at 2:20 AM Takayuki 'January June' Suwa
<jjsuwa_sys3...@yahoo.co.jp> wrote:
>
> After LRA transition, HImode constants that don't fit into signed 12 bits
> are no longer subject to constant synthesis:
>
> /* example */
> void test(void) {
> short foo = 32767;
> __asm__ ("" :: "r"(foo));
> }
>
> ;; before
> .literal_position
> .literal .LC0, 32767
> test:
> l32r a9, .LC0
> ret.n
>
> This patch fixes that:
>
> ;; after
> test:
> movi.n a9, -1
> extui a9, a9, 17, 15
> ret.n
>
> gcc/ChangeLog:
>
> * config/xtensa/xtensa.md (SHI): New mode iterator.
> (2 split patterns related to constsynth):
> Change to also accept HImode operands.
> ---
> gcc/config/xtensa/xtensa.md | 22 ++++++++++++++--------
> 1 file changed, 14 insertions(+), 8 deletions(-)
Regtested for target=xtensa-linux-uclibc, no new regressions.
Committed to master.
--
Thanks.
-- Max
