From df130102cdeca8d35fec95a0c926fd1cfec54eab Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Tue, 26 Feb 2019 11:28:27 +0100
Subject: Prepare release

---
 lib/compiler/doc/src/notes.xml | 47 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'lib/compiler/doc/src/notes.xml')

diff --git a/lib/compiler/doc/src/notes.xml b/lib/compiler/doc/src/notes.xml
index 02e6203137..12429cf561 100644
--- a/lib/compiler/doc/src/notes.xml
+++ b/lib/compiler/doc/src/notes.xml
@@ -32,6 +32,53 @@
   <p>This document describes the changes made to the Compiler
     application.</p>
 
+<section><title>Compiler 7.4</title>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    The compiler has been rewritten to internally use an
+	    intermediate representation based on Static Single
+	    Assignment (SSA). The new intermediate representation
+	    makes more optimizations possible.</p>
+          <p>
+	    Most noticeable is that the binary matching optimizations
+	    are now applicable in many more circumstances than
+	    before.</p>
+          <p>
+	    Another noticeable change is that type optimizations are
+	    now applied across local function calls, and will remove
+	    a lot more redundant type tests than before.</p>
+          <p>
+	    Own Id: OTP-14894 Aux Id: ERL-714 </p>
+        </item>
+        <item>
+	    <p>Funs are no longer created when they are only used
+	    locally, greatly improving the performance of named funs
+	    and "fun-wrapped" macros.</p>
+          <p>
+	    Own Id: OTP-15273 Aux Id: ERL-639 </p>
+        </item>
+        <item>
+	    <p>All compiler options that can be given in the source
+	    file can now also be given in the option list or from the
+	    command line for <c>erlc</c>.</p>
+	    <p>Specifically, the option
+	    <c>{nowarn_deprecated_function,MFAs}</c> was only
+	    recognized when given in the file with the attribute
+	    <c>-compile()</c>. The option
+	    <c>{nowarn_unused_function,FAs}</c> was incorrectly
+	    documented to only work in a file, but it also worked
+	    when given in the option list.</p>
+          <p>
+	    Own Id: OTP-15456</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Compiler 7.3.1</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
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