diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -3957,6 +3957,9 @@
           Left.MatchingParen->endsSequence(tok::l_paren, tok::at)))) {
       return true;
     }
+    // Add space in attribute like `(* ASYNC_REG = "TRUE" *)`.
+    if (Left.endsSequence(tok::star, tok::l_paren) && Right.is(tok::identifier))
+      return true;
   }
   if (Left.is(TT_ImplicitStringLiteral))
     return Right.hasWhitespaceBefore();
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1456,6 +1456,26 @@
     addUnwrappedLine();
     return;
   }
+
+  if (Style.isVerilog()) {
+    // Skip things that can exist before keywords like 'if' and 'case'.
+    while (true) {
+      if (FormatTok->isOneOf(Keywords.kw_priority, Keywords.kw_unique,
+                             Keywords.kw_unique0)) {
+        nextToken();
+      } else if (FormatTok->is(tok::l_paren)) {
+        const FormatToken *Next = Tokens->peekNextToken();
+        if (Next && Next->is(tok::star))
+          parseParens();
+        else
+          break;
+      } else {
+        break;
+      }
+    }
+  }
+
+  // Tokens that only make sense at the beginning of a line.
   switch (FormatTok->Tok.getKind()) {
   case tok::kw_asm:
     nextToken();
diff --git a/clang/unittests/Format/FormatTestVerilog.cpp b/clang/unittests/Format/FormatTestVerilog.cpp
--- a/clang/unittests/Format/FormatTestVerilog.cpp
+++ b/clang/unittests/Format/FormatTestVerilog.cpp
@@ -71,6 +71,12 @@
 TEST_F(FormatTestVerilog, If) {
   verifyFormat("if (x)\n"
                "  x = x;");
+  verifyFormat("unique if (x)\n"
+               "  x = x;");
+  verifyFormat("unique0 if (x)\n"
+               "  x = x;");
+  verifyFormat("priority if (x)\n"
+               "  x = x;");
   verifyFormat("if (x)\n"
                "  x = x;\n"
                "x = x;");
@@ -137,6 +143,14 @@
                "  x = {x};\n"
                "else\n"
                "  {x} = {x};");
+
+  // With attributes.
+  verifyFormat("(* x *) if (x)\n"
+               "  x = x;");
+  verifyFormat("(* x = \"x\" *) if (x)\n"
+               "  x = x;");
+  verifyFormat("(* x, x = \"x\" *) if (x)\n"
+               "  x = x;");
 }
 
 TEST_F(FormatTestVerilog, Preprocessor) {