[Bug target/84790] Miscompilation for MIPS16 with -fpic and -Os or -O2

[syq at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84790

--- Comment #8 from YunQiang Su <syq at gcc dot gnu.org> ---
Ohh, In fact we should use $28 if TARGET_USE_GOT.

Can you help to test this patch?

```
diff --git a/gcc/config/mips/mips.cc b/gcc/config/mips/mips.cc
index b63d40a357b..fe8641d3916 100644
--- a/gcc/config/mips/mips.cc
+++ b/gcc/config/mips/mips.cc
@@ -3342,7 +3342,7 @@ mips16_gp_pseudo_reg (void)
 rtx
 mips_pic_base_register (rtx temp)
 {
-  if (MIPS16_GP_LOADS ||!TARGET_MIPS16)
+  if (MIPS16_GP_LOADS || TARGET_USE_GOT ||!TARGET_MIPS16)
     return pic_offset_table_rtx;

   if (currently_expanding_to_rtl)
```