r331056 - [docs] add -ffp-cast-overflow-workaround to the release notes

[Sanjay Patel via cfe-commits]

Author: spatel
Date: Fri Apr 27 09:21:22 2018
New Revision: 331056

URL: http://llvm.org/viewvc/llvm-project?rev=331056&view=rev
Log:
[docs] add -ffp-cast-overflow-workaround to the release notes

This option was added with:
D46135
rL331041
...copying the text from UsersManual.rst for more exposure.


Modified:
    cfe/trunk/docs/ReleaseNotes.rst

Modified: cfe/trunk/docs/ReleaseNotes.rst
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/ReleaseNotes.rst?rev=331056&r1=331055&r2=331056&view=diff
==============================================================================
--- cfe/trunk/docs/ReleaseNotes.rst (original)
+++ cfe/trunk/docs/ReleaseNotes.rst Fri Apr 27 09:21:22 2018
@@ -83,6 +83,15 @@ Non-comprehensive list of changes in thi
 New Compiler Flags
 ------------------
 
+- :option:`-ffp-cast-overflow-workaround` and
+  :option:`-fnofp-cast-overflow-workaround`
+  enable (disable) a workaround for code that casts floating-point values to
+  integers and back to floating-point. If the floating-point value is not
+  representable in the intermediate integer type, the code is incorrect
+  according to the language standard. This flag will attempt to generate code
+  as if the result of an overflowing conversion matches the overflowing behavior
+  of a target's native float-to-int conversion instructions.
+
 - ...
 
 Deprecated Compiler Flags