Alan,
Thanks for your info. Just notice your patch. I will wait for your
patch being reviewed.
On 3/2/2021 上午 10:32, Alan Modra wrote:
On Fri, Jan 29, 2021 at 11:11:23AM +0800, HAO CHEN GUI via Gcc-patches wrote:
This patch tries to optimize PowerPC 64 bit constant generation when the
constant can be transformed from a 32 bit or 16 bit constant by rotating,
shifting and mask AND.
All and more of what you are doing here for rotated 16-bit constants
is covered by
https://gcc.gnu.org/pipermail/gcc-patches/2020-October/555760.html
That patch is still waiting on review. Hmm, I see my local copy of
that patch has one extra line in
gcc/testsuite/gcc.target/powerpc/rot_cst2.c
+/* { dg-additional-options "-mno-prefixed" { target { lp64 } } } */
in order to keep scan-assembler-times counts correct for power10.
