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Author SHA1 Message Date
Amara Emerson 322d0afd87 [llvm][mlir] Promote the experimental reduction intrinsics to be first class intrinsics. 
This change renames the intrinsics to not have "experimental" in the name.

The autoupgrader will handle legacy intrinsics.

Relevant ML thread: http://lists.llvm.org/pipermail/llvm-dev/2020-April/140729.html

Differential Revision: https://reviews.llvm.org/D88787
 2020-10-07 10:36:44 -07:00
Sander de Smalen cbeb563cfb Change semantics of fadd/fmul vector reductions. 
This patch changes how LLVM handles the accumulator/start value
in the reduction, by never ignoring it regardless of the presence of
fast-math flags on callsites. This change introduces the following
new intrinsics to replace the existing ones:

  llvm.experimental.vector.reduce.fadd -> llvm.experimental.vector.reduce.v2.fadd
  llvm.experimental.vector.reduce.fmul -> llvm.experimental.vector.reduce.v2.fmul

and adds functionality to auto-upgrade existing LLVM IR and bitcode.

Reviewers: RKSimon, greened, dmgreen, nikic, simoll, aemerson

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D60261

llvm-svn: 363035
 2019-06-11 08:22:10 +00:00
Sander de Smalen f83cccf917 Match types of accumulator and result for llvm.experimental.vector.reduce.fadd/fmul 
The scalar start/accumulator value of the fadd- and fmul reduction
should match the result type of the reduction, as well as the vector
element-type of the input vector. Although this was not explicitly
specified in the LangRef, it was taken for granted in code implementing
the reductions. The patch also fixes the LangRef by adding this
constraint.

Reviewed By: aemerson, nikic

Differential Revision: https://reviews.llvm.org/D60260

llvm-svn: 361133
 2019-05-20 09:54:06 +00:00