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Author SHA1 Message Date
Kerry McLaughlin 6d2a78996b [SVE][CodeGen] Add bfloat16 support to scalable masked gather 
Reviewed By: david-arm

Differential Revision: https://reviews.llvm.org/D93307
 2020-12-17 11:08:15 +00:00
Kerry McLaughlin 05edfc5475 [SVE][CodeGen] Add DAG combines for s/zext_masked_gather 
This patch adds the following DAGCombines, which apply if isVectorLoadExtDesirable() returns true:
 - fold (and (masked_gather x)) -> (zext_masked_gather x)
 - fold (sext_inreg (masked_gather x)) -> (sext_masked_gather x)

LowerMGATHER has also been updated to fetch the LoadExtType associated with the
gather and also use this value to determine the correct masked gather opcode to use.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92230
 2020-12-09 11:53:19 +00:00
Kerry McLaughlin f6dd32fd35 [SVE][CodeGen] Lower scalable masked gathers 
Lowers the llvm.masked.gather intrinsics (scalar plus vector addressing mode only)

Changes in this patch:
- Add custom lowering for MGATHER, using getGatherVecOpcode() to choose the appropriate
  gather load opcode to use.
- Improve codegen with refineIndexType/refineUniformBase, added in D90942
- Tests added for gather loads with 32 & 64-bit scaled & unscaled offsets.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D91092
 2020-12-07 12:20:41 +00:00