[LV] Introduce VPBlendRecipe, VPWidenMemoryInstructionRecipe

This patch is part of D38676.

The patch introduces two new Recipes to handle instructions whose vectorization
involves masking. These Recipes take VPlan-level masks in D38676, but still rely
on ILV's existing createEdgeMask(), createBlockInMask() in this patch.

VPBlendRecipe handles intra-loop phi nodes, which are vectorized as a sequence
of SELECTs. Its execute() code is refactored out of ILV::widenPHIInstruction(),
which now handles only loop-header phi nodes.

VPWidenMemoryInstructionRecipe handles load/store which are to be widened
(but are not part of an Interleave Group). In this patch it simply calls
ILV::vectorizeMemoryInstruction on execute().

Differential Revision: https://reviews.llvm.org/D39068

llvm-svn: 318149

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index d43774dd36e..f039e21458a 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -452,11 +452,13 @@ public:
   /// SubclassID field of the VPRecipeBase objects. They are used for concrete
   /// type identification.
   using VPRecipeTy = enum {
+    VPBlendSC,
     VPBranchOnMaskSC,
     VPInterleaveSC,
     VPPredInstPHISC,
     VPReplicateSC,
     VPWidenIntOrFpInductionSC,
+    VPWidenMemoryInstructionSC,
     VPWidenPHISC,
     VPWidenSC,
   };