[gcc r14-466] CRIS-LRA: Define TARGET_SPILL_CLASS

[gcc r14-466] CRIS-LRA: Define TARGET_SPILL_CLASS

[Hans-Peter Nilsson]

https://gcc.gnu.org/g:e88d9e826ee68219dd4dbb2c0d8bdaee0a864301

commit r14-466-ge88d9e826ee68219dd4dbb2c0d8bdaee0a864301
Author: Hans-Peter Nilsson <hp@axis.com>
Date:   Sat Feb 18 05:19:21 2023 +0100

    CRIS-LRA: Define TARGET_SPILL_CLASS
    
    This has no effect on arith-rand-ll (which suffers badly from LRA) and
    marginal effects (0.01% improvement) on coremark, but the size of
    coremark shrinks by 0.2%.  An earlier version was tested with a tree
    around 2023-03 which showed (marginally) that ALL_REGS is preferable
    to GENERAL_REGS.
    
            * config/cris/cris.cc (TARGET_SPILL_CLASS): Define
            to ALL_REGS.

Diff:
---
 gcc/config/cris/cris.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gcc/config/cris/cris.cc b/gcc/config/cris/cris.cc
index 3013e01f22a..496a1a0fe91 100644
--- a/gcc/config/cris/cris.cc
+++ b/gcc/config/cris/cris.cc
@@ -134,6 +134,7 @@ static void cris_init_libfuncs (void);
 static unsigned int cris_postdbr_cmpelim (void);
 
 static reg_class_t cris_preferred_reload_class (rtx, reg_class_t);
+static reg_class_t cris_spill_class (reg_class_t, machine_mode);
 
 static int cris_register_move_cost (machine_mode, reg_class_t, reg_class_t);
 static int cris_memory_move_cost (machine_mode, reg_class_t, bool);
@@ -221,6 +222,9 @@ int cris_cpu_version = CRIS_DEFAULT_CPU_VERSION;
 #undef TARGET_PREFERRED_RELOAD_CLASS
 #define TARGET_PREFERRED_RELOAD_CLASS cris_preferred_reload_class
 
+#undef TARGET_SPILL_CLASS
+#define TARGET_SPILL_CLASS cris_spill_class
+
 /* We don't define TARGET_FIXED_CONDITION_CODE_REGS, as at the time of
    this writing, it has an effect only on pre-reload CSE and when
    scheduling (and for "macro fusion" at that).  Neither applies for
@@ -1681,6 +1685,14 @@ cris_preferred_reload_class (rtx x, reg_class_t rclass)
   return rclass;
 }
 
+/* Worker function for TARGET_SPILL_CLASS.  */
+
+static reg_class_t
+cris_spill_class (reg_class_t /* orig_class */, machine_mode)
+{
+  return ALL_REGS;
+}
+
 /* Worker function for TARGET_REGISTER_MOVE_COST.  */
 
 static int