[PATCH] [DAGCombiner] Add support for FCEIL, FFLOOR and FTRUNC vector constant folding

[Simon Pilgrim]

REPOSITORY
  rL LLVM

================
Comment at: test/CodeGen/X86/vec_floor.ll:228
@@ +227,2 @@
+  ret <4 x float> %t
+}
----------------
RKSimon wrote:
> qcolombet wrote:
> > Could it be possible to add negative test when the conversion are not precise enough?
> Yes I should be able to get something to work - probably with explicit hex values though.
I haven't found anything that works yet - do you known of any equivalent values in other tests? I haven't found anything so far.

http://reviews.llvm.org/D8715

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