Re: [gcc-14 PATCH] Reuse scratch registers generated by LRA

[Vladimir Makarov]

On 3/27/25 7:49 AM, Xi Ruoyao wrote:

I'm proposing the backport to fix an ICE building gegl on powerpc64le:
https://gcc.gnu.org/PR119340.  Bootstrapped and regtested on
powerpc64le-linux-gnu, OK for releases/gcc-14?

OK for me.  Thank you for working on PR119340.

  gcc/lra-constraints.cc | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/lra-constraints.cc b/gcc/lra-constraints.cc
index dbc5129ae0a..0065f46f1f0 100644
--- a/gcc/lra-constraints.cc
+++ b/gcc/lra-constraints.cc
@@ -679,7 +679,8 @@ get_reload_reg (enum op_type type, machine_mode mode, rtx 
original,
         used by reload instructions.  */
        if (REG_P (original)
          && (int) REGNO (original) >= new_regno_start
-         && INSN_UID (curr_insn) >= new_insn_uid_start
+         && (INSN_UID (curr_insn) >= new_insn_uid_start
+             || ira_former_scratch_p (REGNO (original)))
          && in_class_p (original, rclass, &new_class, true))
        {
          unsigned int regno = REGNO (original);