Hi,
The attached patch removes the hardcoded "r0" when printing reg+reg
addressing mode mems on SH.
Tested on sh-elf with
make -k check RUNTESTFLAGS="--target_board=sh-sim\{-m2/-ml,-m2/-mb,
-m2a/-mb,-m4/-ml,-m4/-mb,-m4a/-ml,-m4a/-mb}"
Committed as r237088.
Cheers,
Oleg
gcc/ChangeLog:
* config/sh/sh.c (sh_print_operand_address): Don't use hardcoded 'r0'
for reg+reg addressing mode.diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index 2bd917a..74327aa 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -1038,8 +1038,16 @@ sh_print_operand_address (FILE *stream, machine_mode /*mode*/, rtx x)
int base_num = true_regnum (base);
int index_num = true_regnum (index);
- fprintf (stream, "@(r0,%s)",
- reg_names[MAX (base_num, index_num)]);
+ /* If base or index is R0, make sure that it comes first.
+ Usually one of them will be R0, but the order might be wrong.
+ If neither base nor index are R0 it's an error and we just
+ pass it on to the assembler. This avoids silent wrong code
+ bugs. */
+ if (base_num == 0 && index_num != 0)
+ std::swap (base_num, index_num);
+
+ fprintf (stream, "@(%s,%s)", reg_names[index_num],
+ reg_names[base_num]);
break;
}
