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Author SHA1 Message Date
Simon Pilgrim 23c2182c2b Support generic expansion of ordered vector reduction (PR36732) 
Without the fast math flags, the llvm.experimental.vector.reduce.fadd/fmul intrinsic expansions must be expanded in order.

This patch scalarizes the reduction, applying the accumulator at the start of the sequence: ((((Acc + Scl[0]) + Scl[1]) + Scl[2]) + ) ... + Scl[NumElts-1]

Differential Revision: https://reviews.llvm.org/D45366

llvm-svn: 329585
 2018-04-09 15:44:20 +00:00
Simon Pilgrim 389dc7f0c8 Add additional tests from D45336 
llvm-svn: 329427
 2018-04-06 17:18:44 +00:00
Simon Pilgrim 1e6659c1f0 Add additional tests from D45366 
llvm-svn: 329425
 2018-04-06 17:15:56 +00:00
Amara Emerson 836b0f48c1 Add a late IR expansion pass for the experimental reduction intrinsics. 
This pass uses a new target hook to decide whether or not to expand a particular
intrinsic to the shuffevector sequence.

Differential Revision: https://reviews.llvm.org/D32245

llvm-svn: 302631
 2017-05-10 09:42:49 +00:00