diff --git a/clang/lib/Format/ContinuationIndenter.cpp b/clang/lib/Format/ContinuationIndenter.cpp
--- a/clang/lib/Format/ContinuationIndenter.cpp
+++ b/clang/lib/Format/ContinuationIndenter.cpp
@@ -1359,6 +1359,14 @@
         !Newline)
       NewParenState.UnindentOperator = true;
 
+    if (Style.AlignOperands != FormatStyle::OAS_DontAlign && Previous &&
+        (Previous->getPrecedence() == prec::Assignment ||
+         Previous->is(tok::kw_return) ||
+         (*I == prec::Conditional && Previous->is(tok::question) &&
+          Previous->is(TT_ConditionalExpr))) &&
+        !Newline)
+      NewParenState.IsAligned = true;
+
     // Do not indent relative to the fake parentheses inserted for "." or "->".
     // This is a special case to make the following to statements consistent:
     //   OuterFunction(InnerFunctionCall( // break
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -11259,6 +11259,23 @@
                "\t}\n"
                "};",
                Tab);
+  Tab.AlignOperands = FormatStyle::OAS_Align;
+  verifyFormat("int aaaaaaaaaa = bbbbbbbbbbbbbbbbbbbb +\n"
+               "                 cccccccccccccccccccc;",
+               Tab);
+  // no alignment
+  verifyFormat("int aaaaaaaaaa =\n"
+               "\tbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;",
+               Tab);
+  verifyFormat("return aaaaaaaaaaaaaaaa ? 111111111111111\n"
+               "       : bbbbbbbbbbbbbb ? 222222222222222\n"
+               "                        : 333333333333333;",
+               Tab);
+  Tab.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
+  Tab.AlignOperands = FormatStyle::OAS_AlignAfterOperator;
+  verifyFormat("int aaaaaaaaaa = bbbbbbbbbbbbbbbbbbbb\n"
+               "               + cccccccccccccccccccc;",
+               Tab);
 }
 
 TEST_F(FormatTest, ZeroTabWidth) {