https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100418
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
LRA uses for this kind of things emit_add2_insn.
This is during expansion though, and I think other spots e.g. in builtins.c use
in such cases
builtins.c- ret = plus_constant (GET_MODE (ret), ret, INTVAL
(len_rtx));
builtins.c: ret = emit_move_insn (target, force_operand (ret,
NULL_RTX));
instead, so I'd certainly try:
--- gcc/builtins.c.jj 2021-05-04 21:02:23.954802278 +0200
+++ gcc/builtins.c 2021-05-05 12:35:51.990008546 +0200
@@ -6775,7 +6775,8 @@ try_store_by_multiple_pieces (rtx to, rt
PTR+offset, we have to replace it. */
emit_move_insn (ptr, XEXP (to, 0));
to = replace_equiv_address (to, ptr);
- emit_move_insn (rem, plus_constant (ptr_mode, rem, -blksize));
+ rtx rem_minus_blksize = plus_constant (ptr_mode, rem, -blksize);
+ emit_move_insn (rem, force_operand (rem_minus_blksize, NULL_RTX));
}
/* Iterate over power-of-two block sizes from the maximum length to
@@ -6811,7 +6812,8 @@ try_store_by_multiple_pieces (rtx to, rt
{
emit_move_insn (ptr, XEXP (to, 0));
to = replace_equiv_address (to, ptr);
- emit_move_insn (rem, plus_constant (ptr_mode, rem, -blksize));
+ rtx rem_minus_blksize = plus_constant (ptr_mode, rem, -blksize);
+ emit_move_insn (rem, force_operand (rem_minus_blksize, NULL_RTX));
}
if (label)
