https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108738
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
A perf report isn't very conclusive, but at least points at STV:
Samples: 3M of event 'cycles:u', Event count (approx.): 4455606089800
Samples Command Shared Object Symbol
2153935 cc1 cc1 [.] bitmap_bit_p
288315 cc1 cc1 [.] (anonymous
namespace)::scalar_chain::analyze_register_chain
145980 cc1 cc1 [.] bitmap_equal_p
85953 cc1 cc1 [.] pop_scope
70985 cc1 cc1 [.] bitmap_ior_into
87675 cc1 cc1 [.] df_chain_create
with -O2 -mno-stv we get to
machine dep reorg : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 ( 0%)
TOTAL : 202.90 8.46 211.41
1475M
