Index: clang/docs/ClangFormatStyleOptions.rst
===================================================================
--- clang/docs/ClangFormatStyleOptions.rst
+++ clang/docs/ClangFormatStyleOptions.rst
@@ -1987,6 +1987,39 @@
     false:
      template<typename T> concept ...
 
+**BreakBeforeInlineASMColon** (``BreakBeforeInlineASMColonStyle``)
+  The inline ASM colon style to use.
+
+  Possible values:
+
+  * ``BBIAS_Never`` (in configuration: ``Never``)
+    No break before inline ASM colon.
+
+    .. code-block:: c++
+
+       asm volatile("string", : : val);
+
+  * ``BBIAS_OnlyMultiline`` (in configuration: ``OnlyMultiline``)
+    Break before inline ASM colon if the line length is longer than column limit.
+
+    .. code-block:: c++
+
+       asm volatile("string", : : val);
+       asm("cmoveq %1, %2, %[result]"
+           : [result] "=r"(result)
+           : "r"(test), "r"(new), "[result]"(old));
+
+  * ``BBIAS_Always`` (in configuration: ``Always``)
+    Always break before inline ASM colon.
+
+    .. code-block:: c++
+
+       asm volatile("string",
+                    :
+                    : val);
+
+
+
 **BreakBeforeTernaryOperators** (``bool``)
   If ``true``, ternary operators will be placed after line breaks.
 
Index: clang/include/clang/Format/Format.h
===================================================================
--- clang/include/clang/Format/Format.h
+++ clang/include/clang/Format/Format.h
@@ -1751,6 +1751,33 @@
   /// \endcode
   bool BreakBeforeConceptDeclarations;
 
+  /// Different ways to break ASM parameters.
+  enum BreakBeforeInlineASMColonStyle : unsigned char {
+    /// No break before inline ASM colon.
+    /// \code
+    ///    asm volatile("string", : : val);
+    /// \endcode
+    BBIAS_Never,
+    /// Break before inline ASM colon if the line length is longer than column limit.
+    /// \code
+    ///    asm volatile("string", : : val);
+    ///    asm("cmoveq %1, %2, %[result]"
+    ///        : [result] "=r"(result)
+    ///        : "r"(test), "r"(new), "[result]"(old));
+    /// \endcode
+    BBIAS_OnlyMultiline,
+    /// Always break before inline ASM colon.
+    /// \code
+    ///    asm volatile("string",
+    ///                 :
+    ///                 : val);
+    /// \endcode
+    BBIAS_Always,
+  };
+
+  /// The inline ASM colon style to use.
+  BreakBeforeInlineASMColonStyle BreakBeforeInlineASMColon;
+
   /// If ``true``, ternary operators will be placed after line breaks.
   /// \code
   ///    true:
@@ -3417,6 +3444,7 @@
            BreakBeforeBinaryOperators == R.BreakBeforeBinaryOperators &&
            BreakBeforeBraces == R.BreakBeforeBraces &&
            BreakBeforeConceptDeclarations == R.BreakBeforeConceptDeclarations &&
+           BreakBeforeInlineASMColon == R.BreakBeforeInlineASMColon &&
            BreakBeforeTernaryOperators == R.BreakBeforeTernaryOperators &&
            BreakConstructorInitializers == R.BreakConstructorInitializers &&
            CompactNamespaces == R.CompactNamespaces &&
Index: clang/lib/Format/ContinuationIndenter.cpp
===================================================================
--- clang/lib/Format/ContinuationIndenter.cpp
+++ clang/lib/Format/ContinuationIndenter.cpp
@@ -334,7 +334,10 @@
     auto LambdaBodyLength = getLengthToMatchingParen(Current, State.Stack);
     return (LambdaBodyLength > getColumnLimit(State));
   }
-  if (Current.MustBreakBefore || Current.is(TT_InlineASMColon))
+  if (Current.MustBreakBefore ||
+      (Current.is(TT_InlineASMColon) &&
+       (Style.BreakBeforeInlineASMColon == FormatStyle::BBIAS_Always ||
+        Style.BreakBeforeInlineASMColon == FormatStyle::BBIAS_OnlyMultiline)))
     return true;
   if (State.Stack.back().BreakBeforeClosingBrace &&
       Current.closesBlockOrBlockTypeList(Style))
Index: clang/lib/Format/Format.cpp
===================================================================
--- clang/lib/Format/Format.cpp
+++ clang/lib/Format/Format.cpp
@@ -243,6 +243,16 @@
   }
 };
 
+template <>
+struct ScalarEnumerationTraits<FormatStyle::BreakBeforeInlineASMColonStyle> {
+  static void
+  enumeration(IO &IO, FormatStyle::BreakBeforeInlineASMColonStyle &Value) {
+    IO.enumCase(Value, "Never", FormatStyle::BBIAS_Never);
+    IO.enumCase(Value, "OnlyMultiline", FormatStyle::BBIAS_OnlyMultiline);
+    IO.enumCase(Value, "Always", FormatStyle::BBIAS_Always);
+  }
+};
+
 template <>
 struct ScalarEnumerationTraits<FormatStyle::BreakConstructorInitializersStyle> {
   static void
@@ -612,6 +622,9 @@
         Style.BreakInheritanceList == FormatStyle::BILS_BeforeColon)
       Style.BreakInheritanceList = FormatStyle::BILS_BeforeComma;
 
+    IO.mapOptional("BreakBeforeInlineASMColon",
+                   Style.BreakBeforeInlineASMColon);
+
     IO.mapOptional("BreakBeforeTernaryOperators",
                    Style.BreakBeforeTernaryOperators);
 
@@ -1006,6 +1019,7 @@
   LLVMStyle.BinPackParameters = true;
   LLVMStyle.BreakBeforeBinaryOperators = FormatStyle::BOS_None;
   LLVMStyle.BreakBeforeConceptDeclarations = true;
+  LLVMStyle.BreakBeforeInlineASMColon = FormatStyle::BBIAS_OnlyMultiline;
   LLVMStyle.BreakBeforeTernaryOperators = true;
   LLVMStyle.BreakBeforeBraces = FormatStyle::BS_Attach;
   LLVMStyle.BraceWrapping = {/*AfterCaseLabel=*/false,
Index: clang/lib/Format/TokenAnnotator.cpp
===================================================================
--- clang/lib/Format/TokenAnnotator.cpp
+++ clang/lib/Format/TokenAnnotator.cpp
@@ -3602,6 +3602,9 @@
   const FormatToken &Left = *Right.Previous;
   if (Right.NewlinesBefore > 1 && Style.MaxEmptyLinesToKeep > 0)
     return true;
+  if (Line.startsWith(tok::kw_asm) && Right.is(TT_InlineASMColon) &&
+      Style.BreakBeforeInlineASMColon == FormatStyle::BBIAS_Always)
+    return true;
 
   if (Style.isCSharp()) {
     if (Right.is(TT_CSharpNamedArgumentColon) ||
Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -6240,6 +6240,43 @@
             format(Input, Style));
 }
 
+TEST_F(FormatTest, BreakBeforeInlineASMColon) {
+  FormatStyle Style = getLLVMStyle();
+  Style.BreakStringLiterals = false;
+  Style.BreakBeforeInlineASMColon = FormatStyle::BBIAS_Never;
+  /* Test the behaviour with long lines */
+  Style.ColumnLimit = 40;
+  verifyFormat("asm volatile(\"loooooooooooooooooooong\",\n"
+               "             : : val);",
+               Style);
+  verifyFormat("asm volatile(\"loooooooooooooooooooong\",\n"
+               "             : val1 : val2);",
+               Style);
+  Style.ColumnLimit = 80;
+  verifyFormat("asm volatile(\"string\", : : val);", Style);
+  verifyFormat("asm volatile(\"string\", : val1 : val2);", Style);
+
+  Style.BreakBeforeInlineASMColon = FormatStyle::BBIAS_Always;
+  verifyFormat("asm volatile(\"string\",\n"
+               "             :\n"
+               "             : val);",
+               Style);
+  verifyFormat("asm volatile(\"string\",\n"
+               "             : val1\n"
+               "             : val2);",
+               Style);
+  /* Test the behaviour with long lines */
+  Style.ColumnLimit = 40;
+  verifyFormat("asm volatile(\"loooooooooooooooooooong\",\n"
+               "             :\n"
+               "             : val);",
+               Style);
+  verifyFormat("asm volatile(\"loooooooooooooooooooong\",\n"
+               "             : val1\n"
+               "             : val2);",
+               Style);
+}
+
 TEST_F(FormatTest, BreakConstructorInitializersAfterColon) {
   FormatStyle Style = getLLVMStyle();
   Style.BreakConstructorInitializers = FormatStyle::BCIS_AfterColon;