https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106008
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-06-16
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Simply change the cost of integer store makes the warnings to go away:
diff --git a/gcc/config/i386/x86-tune-costs.h
b/gcc/config/i386/x86-tune-costs.h
index 6c9066c84cc..b83bb79c065 100644
--- a/gcc/config/i386/x86-tune-costs.h
+++ b/gcc/config/i386/x86-tune-costs.h
@@ -3276,7 +3276,11 @@ struct processor_costs generic_cost = {
{6, 6, 6}, /* cost of loading integer registers
in QImode, HImode and SImode.
Relative to reg-reg move (2). */
+#if 0
{6, 6, 6}, /* cost of storing integer registers */
+#else
+ {8, 8, 8}, /* cost of storing integer registers */
+#endif
{6, 6, 6, 10, 15}, /* cost of loading SSE register
in 32bit, 64bit, 128bit, 256bit and 512bit */
{6, 6, 6, 10, 15}, /* cost of storing SSE register
