[gcc r12-5461] contrib: Support itemx in check-params-in-docs.py.

[Martin Liska <marxin@gcc.gnu.org>]

https://gcc.gnu.org/g:cab8f69857d0c551ef760079a027323dda6b2694

commit r12-5461-gcab8f69857d0c551ef760079a027323dda6b2694
Author: Martin Liska <mliska@suse.cz>
Date:   Tue Nov 23 08:26:51 2021 +0100

    contrib: Support itemx in check-params-in-docs.py.
    
    contrib/ChangeLog:
    
            * check-params-in-docs.py: Support @itemx in param documentation
            and support multi-line documentation for parameters.

Diff:
---
 contrib/check-params-in-docs.py | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/contrib/check-params-in-docs.py b/contrib/check-params-in-docs.py
index 440549f5fd8..d57055088b7 100755
--- a/contrib/check-params-in-docs.py
+++ b/contrib/check-params-in-docs.py
@@ -47,7 +47,7 @@ ignored = {'logical-op-non-short-circuit'}
 params = {}
 
 for line in open(args.params_output).readlines():
-    if line.startswith('  '):
+    if line.startswith(' ' * 2) and not line.startswith(' ' * 8):
         r = get_param_tuple(line)
         params[r[0]] = r[1]
 
@@ -57,15 +57,20 @@ texi = dropwhile(lambda x: 'item --param' not in x, texi)
 texi = takewhile(lambda x: '@node Instrumentation Options' not in x, texi)
 texi = list(texi)[1:]
 
-token = '@item '
-texi = [x[len(token):] for x in texi if x.startswith(token)]
+texi_params = []
+for line in texi:
+    for token in ('@item ', '@itemx '):
+        if line.startswith(token):
+            texi_params.append(line[len(token):])
+            break
+
 # skip digits
-texi = [x for x in texi if not x[0].isdigit()]
+texi_params = [x for x in texi_params if not x[0].isdigit()]
 # skip aarch64 params
-texi = [x for x in texi if not x.startswith('aarch64')]
-sorted_texi = sorted(texi)
+texi_params = [x for x in texi_params if not x.startswith('aarch64')]
+sorted_params = sorted(texi_params)
 
-texi_set = set(texi) - ignored
+texi_set = set(texi_params) - ignored
 params_set = set(params.keys()) - ignored
 
 success = True
@@ -84,7 +89,4 @@ if len(missing):
         print()
     success = False
 
-if texi != sorted_texi:
-    print('WARNING: not sorted alphabetically!')
-
 sys.exit(0 if success else 1)