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Michael Kuperstein ad3a898d94 [DAGCombine] Make sext(setcc) combine respect getBooleanContents
We used to combine "sext(setcc x, y, cc) -> (select (setcc x, y, cc), -1, 0)"
Instead, we should combine to (select (setcc x, y, cc), T, 0) where the value
of T is 1 or -1, depending on the type of the setcc, and getBooleanContents()
for the type if it is not i1.

This fixes PR28504.

llvm-svn: 277371
2016-08-01 19:39:49 +00:00
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2016-08-01 18:07:19 +00:00