gcc-changelog: Support multiline parentheses wrapping

contrib/ChangeLog:

	* gcc-changelog/git_commit.py: Support wrapping of functions
	in parentheses that can take multiple lines.
	* gcc-changelog/test_email.py: Add tests for it.
	* gcc-changelog/test_patches.txt: Add 2 patches.

3 files changed, 100 insertions, 2 deletions

diff --git a/contrib/gcc-changelog/git_commit.py b/contrib/gcc-changelog/git_commit.py
index 59f478670d7..e9dae0a838d 100755
--- a/contrib/gcc-changelog/git_commit.py
+++ b/contrib/gcc-changelog/git_commit.py
@@ -214,6 +214,7 @@ class ChangeLogEntry:
         self.lines = []
         self.files = []
         self.file_patterns = []
+        self.opened_parentheses = 0
 
     def parse_file_names(self):
         # Whether the content currently processed is between a star prefix the
@@ -223,8 +224,14 @@ class ChangeLogEntry:
         for line in self.lines:
             # If this line matches the star prefix, start the location
             # processing on the information that follows the star.
+            # Note that we need to skip macro names that can be in form of:
+            #
+            # * config/i386/i386.md (*fix_trunc<mode>_i387_1,
+            # *add<mode>3_ne, *add<mode>3_eq_0, *add<mode>3_ne_0,
+            # *fist<mode>2_<rounding>_1, *<code><mode>3_1):
+            #
             m = star_prefix_regex.match(line)
-            if m:
+            if m and len(m.group('spaces')) == 1:
                 in_location = True
                 line = m.group('content')
 
@@ -328,6 +335,7 @@ class GitCommit:
             self.parse_changelog()
             self.parse_file_names()
             self.check_for_empty_description()
+            self.check_for_broken_parentheses()
             self.deduce_changelog_locations()
             self.check_file_patterns()
             if not self.errors:
@@ -496,7 +504,8 @@ class GitCommit:
                 else:
                     m = star_prefix_regex.match(line)
                     if m:
-                        if len(m.group('spaces')) != 1:
+                        if (len(m.group('spaces')) != 1 and
+                                last_entry.opened_parentheses == 0):
                             msg = 'one space should follow asterisk'
                             self.errors.append(Error(msg, line))
                         else:
@@ -508,6 +517,7 @@ class GitCommit:
                                         msg = f'empty group "{needle}" found'
                                         self.errors.append(Error(msg, line))
                             last_entry.lines.append(line)
+                            self.process_parentheses(last_entry, line)
                     else:
                         if last_entry.is_empty:
                             msg = 'first line should start with a tab, ' \
@@ -515,6 +525,18 @@ class GitCommit:
                             self.errors.append(Error(msg, line))
                         else:
                             last_entry.lines.append(line)
+                            self.process_parentheses(last_entry, line)
+
+    def process_parentheses(self, last_entry, line):
+        for c in line:
+            if c == '(':
+                last_entry.opened_parentheses += 1
+            elif c == ')':
+                if last_entry.opened_parentheses == 0:
+                    msg = 'bad wrapping of parenthesis'
+                    self.errors.append(Error(msg, line))
+                else:
+                    last_entry.opened_parentheses -= 1
 
     def parse_file_names(self):
         for entry in self.changelog_entries:
@@ -538,6 +560,12 @@ class GitCommit:
                     msg = 'missing description of a change'
                     self.errors.append(Error(msg, line))
 
+    def check_for_broken_parentheses(self):
+        for entry in self.changelog_entries:
+            if entry.opened_parentheses != 0:
+                msg = 'bad parentheses wrapping'
+                self.errors.append(Error(msg, entry.lines[0]))
+
     def get_file_changelog_location(self, changelog_file):
         for file in self.info.modified_files:
             if file[0] == changelog_file:
diff --git a/contrib/gcc-changelog/test_email.py b/contrib/gcc-changelog/test_email.py
index 532ed6a7983..b81548f2033 100755
--- a/contrib/gcc-changelog/test_email.py
+++ b/contrib/gcc-changelog/test_email.py
@@ -408,3 +408,11 @@ class TestGccChangelog(unittest.TestCase):
     def test_modification_of_old_changelog(self):
         email = self.from_patch_glob('0001-fix-old-ChangeLog.patch')
         assert not email.errors
+
+    def test_multiline_parentheses(self):
+        email = self.from_patch_glob('0001-Add-macro.patch')
+        assert not email.errors
+
+    def test_multiline_bad_parentheses(self):
+        email = self.from_patch_glob('0002-Wrong-macro-changelog.patch')
+        assert email.errors[0].message == 'bad parentheses wrapping'
diff --git a/contrib/gcc-changelog/test_patches.txt b/contrib/gcc-changelog/test_patches.txt
index 6b75e488903..9de28972556 100644
--- a/contrib/gcc-changelog/test_patches.txt
+++ b/contrib/gcc-changelog/test_patches.txt
@@ -3418,4 +3418,66 @@ index 6553720acad..2c170ef014a 100644
  
 -- 
 2.29.2
+=== 0001-Add-macro.patch ===
+From 9b7eedc932fe594547fb060b36dfd9e4178c4f9b Mon Sep 17 00:00:00 2001
+From: Martin Liska <mliska@suse.cz>
+Date: Wed, 13 Jan 2021 16:26:45 +0100
+Subject: [PATCH 1/2] Add macro.
+
+gcc/ChangeLog:
+
+	* config/i386/i386.md (*fix_trunc<mode>_i387_1, *add<mode>3_eq,
+	*add<mode>3_ne, *add<mode>3_eq_0, *add<mode>3_ne_0, *add<mode>3_eq,
+	*fist<mode>2_<rounding>_1, *<code><mode>3_1, *<code>di3_doubleword):
+	Use ix86_pre_reload_split instead of can_create_pseudo_p in condition.
+	* config/i386/sse.md
+	(*fix_trunc<mode>_i387_1, *add<mode>3_eq,
+	*add<mode>3_ne, *add<mode>3_eq_0, *add<mode>3_ne_0, *add<mode>3_eq,
+	*fist<mode>2_<rounding>_1): This should also work.
+---
+ gcc/config/i386/i386.md | 1 +
+ gcc/config/i386/sse.md  | 1 +
+ 2 files changed, 2 insertions(+)
 
+diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
+index b60784a2908..ac63591b33f 100644
+--- a/gcc/config/i386/i386.md
++++ b/gcc/config/i386/i386.md
+@@ -1 +1,2 @@
+ 
++
+
+diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
+index 7f03fc491c3..0e17997db26 100644
+--- a/gcc/config/i386/sse.md
++++ b/gcc/config/i386/sse.md
+@@ -1 +1,2 @@
+ 
++
+
+-- 
+2.29.2
+
+=== 0002-Wrong-macro-changelog.patch ===
+From 3542802111d4c6752ac7233ef96655b7fb78aae4 Mon Sep 17 00:00:00 2001
+From: Martin Liska <mliska@suse.cz>
+Date: Wed, 13 Jan 2021 16:54:58 +0100
+Subject: [PATCH 2/2] Wrong macro changelog
+
+gcc/ChangeLog:
+
+	* config/i386/i386.md (*fix_trunc<mode>_i387_1,
+	(foo): Change it.
+---
+ gcc/config/i386/i386.md | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
+index ac63591b33f..ff4d61764e7 100644
+--- a/gcc/config/i386/i386.md
++++ b/gcc/config/i386/i386.md
+@@ -1 +1,2 @@
+ 
++
+-- 
+2.29.2