[Bug target/119142] [15 Regression] Many regressions since r15-7852 on i686-linux

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119142

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
Something like

diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 661e71b032c..8e599bb22fc 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -20613,11 +20613,10 @@ ix86_callee_save_cost (spill_cost_type, unsigned int
hard_regno, machine_mode,
       /* push is 1 byte while typical spill is 4-5 bytes.
    ??? We probably should adjust size costs accordingly.
    Costs are relative to reg-reg move that has 2 bytes for 32bit
-   and 3 bytes otherwise.  */
-      if (optimize_function_for_size_p (cfun))
+   and 3 bytes otherwise.  Be sure that no cost table sets cost
+   to 2, so we end up with 0.  */
+      if (mem_cost < 2 || optimize_function_for_size_p (cfun))
   return 1;
-      /* Be sure that no cost table sets cost to 2, so we end up with 0.  */
-      gcc_checking_assert (mem_cost > 2);
       return mem_cost - 2;
     }
   return mem_cost;