diff --git a/clang/tools/clang-format/clang-format-diff.py b/clang/tools/clang-format/clang-format-diff.py
--- a/clang/tools/clang-format/clang-format-diff.py
+++ b/clang/tools/clang-format/clang-format-diff.py
@@ -61,8 +61,8 @@
     parser.add_argument(
         "-iregex",
         metavar="PATTERN",
-        default=r".*\.(cpp|cc|c\+\+|cxx|cppm|ccm|cxxm|c\+\+m|c|cl|h|hh|hpp|hxx"
-        r"|m|mm|inc|js|ts|proto|protodevel|java|cs|json)",
+        default=r".*\.(?:cpp|cc|c\+\+|cxx|cppm|ccm|cxxm|c\+\+m|c|cl|h|hh|hpp"
+        r"|hxx|m|mm|inc|js|ts|proto|protodevel|java|cs|json|s?vh?)",
         help="custom pattern selecting file paths to reformat "
         "(case insensitive, overridden by -regex)",
     )
diff --git a/clang/tools/clang-format/git-clang-format b/clang/tools/clang-format/git-clang-format
--- a/clang/tools/clang-format/git-clang-format
+++ b/clang/tools/clang-format/git-clang-format
@@ -98,6 +98,7 @@
       'ts',  # TypeScript
       'cs',  # C Sharp
       'json',  # Json
+      'sv', 'svh', 'v', 'vh', # Verilog
       ])
 
   p = argparse.ArgumentParser(