[gcc r17-3931] middle-end: Remove all GCC's uses of ENUM_BITFIELD. [PR125507]

[Kael Andrew Franco]

https://gcc.gnu.org/g:e7f3238d66eec925c4183f2e28f148ba4cc223c2

commit r17-3931-ge7f3238d66eec925c4183f2e28f148ba4cc223c2
Author: Kael Andrew Alonzo Franco <kaelfandrew@gmail.com>
Date:   Fri Sep 4 12:24:26 2026 -0400

    middle-end: Remove all GCC's uses of ENUM_BITFIELD. [PR125507]
    
    GCC requires C++14, which supports enum bitfield so ENUM_BITFIELD
    is removed in GCC.
    
    Bootstrapped and regtested on x86_64-pc-linux-gnu.
    
            PR middle-end/125507
    
    contrib/ChangeLog:
    
            * filter_params.py (filter_src): Remove ENUM_BITFIELD.
            (FilteringTests): Ditto.
    
    gcc/ChangeLog:
    
            * gengtype-lex.l: Remove ENUM_BITFIELD.
            * real.h (struct real_value): Ditto.
    
    Signed-off-by: Kael Andrew Franco <kaelfandrew@gmail.com>

Diff:
---
 contrib/filter_params.py | 10 ----------
 gcc/gengtype-lex.l       |  3 +--
 gcc/real.h               |  2 +-
 3 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/contrib/filter_params.py b/contrib/filter_params.py
index 359d28b07d2f..0a0d5c559860 100644
--- a/contrib/filter_params.py
+++ b/contrib/filter_params.py
@@ -63,11 +63,6 @@ def filter_src(text):
                   r'(\1)',
                   text)
 
-    # Replace 'ENUM_BITFIELD(enum_name)' with 'enum enum_name'.
-    text = re.sub('ENUM_BITFIELD\s*\(([^\)]*)\)',
-                  r'enum \1',
-                  text)
-
     return text
 
 class FilteringTests(unittest.TestCase):
@@ -156,11 +151,6 @@ class FilteringTests(unittest.TestCase):
             'char *strcpy PARAMS ((char *dest, char *source));\n',
             'char *strcpy (char *dest, char *source);\n')
 
-    def test_ENUM_BITFIELD(self):
-        self.assert_filters_to(
-            '  ENUM_BITFIELD (sym_intent) intent:2;\n',
-            '  enum sym_intent intent:2;\n')
-
 def act_on_files(argv):
     for filename in argv[1:]:
         with open(filename) as f:
diff --git a/gcc/gengtype-lex.l b/gcc/gengtype-lex.l
index 7d7e81072ac3..13468e29450c 100644
--- a/gcc/gengtype-lex.l
+++ b/gcc/gengtype-lex.l
@@ -119,8 +119,7 @@ CXX_KEYWORD inline|public:|private:|protected:|template|operator|friend|static|m
   return NUM;
 }
 
-{IWORD}({WS}{IWORD})*/{EOID}		|
-"ENUM_BITFIELD"{WS}?"("{WS}?{ID}{WS}?")"	{
+{IWORD}({WS}{IWORD})*/{EOID}	{
   size_t len;
 
   for (len = yyleng; ISSPACE (yytext[len-1]); len--)
diff --git a/gcc/real.h b/gcc/real.h
index e9ddcf5e1717..380dd72b04dd 100644
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -40,7 +40,7 @@ struct GTY(()) real_value {
   /* Use the same underlying type for all bit-fields, so as to make
      sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will
      be miscomputed.  */
-  unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2;
+  unsigned int /* enum real_value_class */ cl : 2;
   /* 1 if number is decimal floating point.  */
   unsigned int decimal : 1;
   /* 1 if number is negative.  */