Hi!
On Fri, Dec 03, 2021 at 07:42:52PM -, Roger Sayle wrote:
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/powerpc/addcmp.c
> @@ -0,0 +1,12 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O2" } */
> +
> +unsigned long add_leu(unsigned long a, unsigned long b, unsigned long c) {
> +
Hi, Roger!
Thanks very much for investigating this issue and developing a patch
to leverage this feature of the PowerPC architecture.
2021-12-03 Roger Sayle
gcc/ChangeLog
PR target/43892
* config/rs6000/rs6000.md (*add3_carry_in_0_2): New
define_insn to recognize
Doh! This time with the patch attached...
This patch resolves PR target/43892 (suboptimal add with carry) by adding
four new define_insn_and_split to the rs6000 backend, that all recognize
pairs of instructions where the first instruction sets the carry flag and
the second one consumes it. It
