[VPlan] Add VPInstruction to VPRecipe transformation.

This patch introduces a VPInstructionToVPRecipe transformation, which
allows us to generate code for a VPInstruction based VPlan re-using the
existing infrastructure.

Reviewers: dcaballe, hsaito, mssimpso, hfinkel, rengolin, mkuper, javed.absar, sguggill

Reviewed By: dcaballe

Differential Revision: https://reviews.llvm.org/D46827

llvm-svn: 334969

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index 0eefa0cea42..86368a8a67f 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -568,6 +568,8 @@ public:
 /// executed, these instructions would always form a single-def expression as
 /// the VPInstruction is also a single def-use vertex.
 class VPInstruction : public VPUser, public VPRecipeBase {
+  friend class VPlanHCFGTransforms;
+
 public:
   /// VPlan opcodes, extending LLVM IR with idiomatics instructions.
   enum { Not = Instruction::OtherOpsEnd + 1 };