[llvm] [LV] Support binary and unary operations with EVL-vectorization (PR #93854)

Florian Hahn via llvm-commits llvm-commits at lists.llvm.org
Mon Aug 26 05:55:17 PDT 2024


================
@@ -1214,6 +1218,47 @@ InstructionCost VPWidenRecipe::computeCost(ElementCount VF,
   }
 }
 
+void VPWidenEVLRecipe::execute(VPTransformState &State) {
+  State.setDebugLocFrom(getDebugLoc());
+  assert(State.UF == 1 && "Expected only UF == 1 when vectorizing with "
+                          "explicit vector length.");
+  VPValue *Op0 = getOperand(0);
+
+  assert(State.get(Op0, 0)->getType()->isVectorTy() &&
+         "VPWidenEVLRecipe should not be used for scalars");
+
+  VPValue *EVL = getEVL();
+  Value *EVLArg = State.get(EVL, 0, /*NeedsScalar=*/true);
+  unsigned Opcode = getOpcode();
+  Instruction *I = getUnderlyingInstr();
+  IRBuilderBase &BuilderIR = State.Builder;
+  VectorBuilder Builder(BuilderIR);
+  Value *Mask = BuilderIR.CreateVectorSplat(State.VF, BuilderIR.getTrue());
+  Value *VPInst = nullptr;
+
+  //===------------------- Binary and Unary Ops ---------------------===//
+  if (Instruction::isBinaryOp(Opcode) || Instruction::isUnaryOp(Opcode)) {
+    // Just widen unops and binops.
+
+    SmallVector<Value *, 4> Ops;
+    for (unsigned I = 0, E = getNumOperands() - 1; I < E; ++I) {
+      VPValue *VPOp = getOperand(I);
+      Ops.push_back(State.get(VPOp, 0));
+    }
+
+    Builder.setMask(Mask).setEVL(EVLArg);
+    VPInst = Builder.createVectorInstruction(Opcode, Ops[0]->getType(), Ops,
+                                             "vp.op");
+
+    if (auto *VecOp = dyn_cast_or_null<Instruction>(VPInst))
+      VecOp->copyIRFlags(I);
----------------
fhahn wrote:

Sure, test could also be added before widened EVL support.

https://github.com/llvm/llvm-project/pull/93854


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