commit 7757567358a84c3774cb972350bd7ea299daaa8d
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date: Fri Feb 10 12:17:07 2023 -0500
RA: Use caller save equivalent memory only for LRA
Recently I submitted a patch to reuse memory with constant address for
caller saves optimization for constant or pure function call. It
seems to work only for targets using LRA instead of the old reload
pass. So the patch switches off this optimization when the old reload
pass is used.
PR middle-end/108754
gcc/ChangeLog:
* ira.cc (update_equiv_regs): Set up ira_reg_equiv for
valid_combine only when ira_use_lra_p is true.
@@ -3773,7 +3773,7 @@ update_equiv_regs (void)
{
note = set_unique_reg_note (insn, REG_EQUIV, replacement);
}
- else
+ else if (ira_use_lra_p)
{
/* We still can use this equivalence for caller save
optimization in LRA. Mark this. */