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[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.

llvm-svn: 331056
This commit is contained in:
Sanjay Patel 2018-04-27 16:21:22 +00:00
parent 6b01b88012
commit cee47befe4
1 changed files with 9 additions and 0 deletions
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clang/docs/ReleaseNotes.rst
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@ -83,6 +83,15 @@ Non-comprehensive list of changes in this release
New Compiler Flags 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 Deprecated Compiler Flags