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[X86][ReleaseNotes] Add a note about the switch to widening legalization for narrow vectors. 

llvm-svn: 370233
This commit is contained in:
Craig Topper 2019-08-28 17:18:56 +00:00
parent 165d47969a
commit a47db7110d
1 changed files with 5 additions and 0 deletions
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llvm/docs/ReleaseNotes.rst
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@ -85,6 +85,11 @@ Changes to the X86 Target
During this release ...
* Less than 128 bit vector types, v2i32, v4i16, v2i16, v8i8, v4i8, and v2i8, are
now stored in the lower bits of an xmm register and the upper bits are
undefined. Previously the elements were spread apart with undefined bits in
between them.
Changes to the AMDGPU Target
-----------------------------