On 4/25/23 14:20, Vineet Gupta wrote:
Just a note, there are some regressions in this table. For example xz
input #2. So to be fair when making comparisons it's probably worth
noting the regressions as well as improvements.
Fair point, but in my defense I dropped anything under 0.1 % (including
improvements).
No worries.
Anyway, my results are in line with yours. Given the instruction
counts and known IPC, I think we're taking about a 2.5% hit on
deepsjeng and about a 1% hit on leela and x264#2 comparing our
internal gcc-12 vs gcc-13 trees.
I think you are referring to the bigger deepsjeng regression due to
commit 2e886eef7f2b5a which introduced the splitter movconst_internal.
This patch is about a small improvement to all splitters which reduces
that perf loss slightly (but does regress some tests too as pointed above).
Correct. I'm referring to the larger gcc-12 to gcc-13 comparison, not
your patch in my comment about regressions. Sorry for not being clear
about that.
Jeff
