https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83358
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The following fixes this particular issue:
diff --git a/gcc/config/i386/x86-tune-costs.h
b/gcc/config/i386/x86-tune-costs.h
index 312467d9788..00f1dae9085 100644
--- a/gcc/config/i386/x86-tune-costs.h
+++ b/gcc/config/i386/x86-tune-costs.h
@@ -2345,7 +2345,7 @@ struct processor_costs core_cost = {
{COSTS_N_INSNS (8), /* cost of a divide/mod for QI */
COSTS_N_INSNS (8), /* HI */
/* 8-11 */
- COSTS_N_INSNS (11), /* SI */
+ COSTS_N_INSNS (13), /* SI */
/* 24-81 */
COSTS_N_INSNS (81), /* DI */
COSTS_N_INSNS (81)}, /*
other */
Perhaps the div costs are a bit too tight in general?
