[gcc r12-4287] Remove usage of IRA_REGION_AUTODETECT

[gcc r12-4287] Remove usage of IRA_REGION_AUTODETECT

[Martin Liska]

https://gcc.gnu.org/g:6b7a246d137b9d2a88a899169014a0614195e5c8

commit r12-4287-g6b7a246d137b9d2a88a899169014a0614195e5c8
Author: Martin Liska <mliska@suse.cz>
Date:   Fri Oct 8 09:51:19 2021 +0200

    Remove usage of IRA_REGION_AUTODETECT
    
    gcc/ChangeLog:
    
            * common.opt: Remove usage of IRA_REGION_AUTODETECT.
            * flag-types.h (enum ira_region): Likewise.
            * toplev.c (process_options): Use OPTION_SET_P instead of
            IRA_REGION_AUTODETECT.

Diff:
---
 gcc/common.opt   | 2 +-
 gcc/flag-types.h | 4 ----
 gcc/toplev.c     | 2 +-
 3 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/gcc/common.opt b/gcc/common.opt
index 52693e226d2..59ecc9fbdf7 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1923,7 +1923,7 @@ EnumValue
 Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY)
 
 fira-region=
-Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) Optimization
+Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_ONE) Optimization
 -fira-region=[one|all|mixed]	Set regions for IRA.
 
 Enum
diff --git a/gcc/flag-types.h b/gcc/flag-types.h
index 5bd1f771c8b..ae0b216e8a3 100644
--- a/gcc/flag-types.h
+++ b/gcc/flag-types.h
@@ -191,10 +191,6 @@ enum ira_region
   IRA_REGION_ONE,
   IRA_REGION_ALL,
   IRA_REGION_MIXED,
-  /* This value means that there were no options -fira-region on the
-     command line and that we should choose a value depending on the
-     used -O option.  */
-  IRA_REGION_AUTODETECT
 };
 
 /* The options for excess precision.  */
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 81748b1152a..b878234f3f2 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -1319,7 +1319,7 @@ process_options (bool no_backend)
     }
 
   /* One region RA really helps to decrease the code size.  */
-  if (flag_ira_region == IRA_REGION_AUTODETECT)
+  if (!OPTION_SET_P (flag_ira_region))
     flag_ira_region
       = optimize_size || !optimize ? IRA_REGION_ONE : IRA_REGION_MIXED;