[llvm] 510710d - [RISCV][NFC] Add getVLOperand for RVV intrinsics.

[Zakk Chen via llvm-commits]

Author: Zakk Chen
Date: 2022-01-25T17:37:58-08:00
New Revision: 510710d0374908e3e2bd37f9a32065da423a7e4c

URL: https://github.com/llvm/llvm-project/commit/510710d0374908e3e2bd37f9a32065da423a7e4c
DIFF: https://github.com/llvm/llvm-project/commit/510710d0374908e3e2bd37f9a32065da423a7e4c.diff

LOG: [RISCV][NFC] Add getVLOperand for RVV intrinsics.

Use the VLOperand information to get the VL.

Differential Revision: https://reviews.llvm.org/D118156

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/RISCVISelLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index b831fdcb1d47..a01c76d58796 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -1547,6 +1547,19 @@ bool RISCVTargetLowering::isLegalElementTypeForRVV(Type *ScalarTy) const {
   return false;
 }
 
+static SDValue getVLOperand(SDValue Op) {
+  assert((Op.getOpcode() == ISD::INTRINSIC_WO_CHAIN ||
+          Op.getOpcode() == ISD::INTRINSIC_W_CHAIN) &&
+         "Unexpected opcode");
+  bool HasChain = Op.getOpcode() == ISD::INTRINSIC_W_CHAIN;
+  unsigned IntNo = Op.getConstantOperandVal(HasChain ? 1 : 0);
+  const RISCVVIntrinsicsTable::RISCVVIntrinsicInfo *II =
+      RISCVVIntrinsicsTable::getRISCVVIntrinsicInfo(IntNo);
+  if (!II)
+    return SDValue();
+  return Op.getOperand(II->VLOperand + 1 + HasChain);
+}
+
 static bool useRVVForFixedLengthVectorVT(MVT VT,
                                          const RISCVSubtarget &Subtarget) {
   assert(VT.isFixedLengthVector() && "Expected a fixed length vector type!");
@@ -4372,7 +4385,7 @@ static SDValue lowerVectorIntrinsicSplats(SDValue Op, SelectionDAG &DAG,
   // We need to convert the scalar to a splat vector.
   // FIXME: Can we implicitly truncate the scalar if it is known to
   // be sign extended?
-  SDValue VL = Op.getOperand(II->VLOperand + 1 + HasChain);
+  SDValue VL = getVLOperand(Op);
   assert(VL.getValueType() == XLenVT);
   ScalarOp = splatSplitI64WithVL(DL, VT, ScalarOp, VL, DAG);
   return DAG.getNode(Op->getOpcode(), DL, Op->getVTList(), Operands);
@@ -4460,7 +4473,7 @@ SDValue RISCVTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
     //   vmerge.vvm vDest, vSrc, vVal, mMask
     MVT VT = Op.getSimpleValueType();
     SDValue Vec = Op.getOperand(1);
-    SDValue VL = Op.getOperand(3);
+    SDValue VL = getVLOperand(Op);
 
     SDValue SplattedVal = splatSplitI64WithVL(DL, VT, Scalar, VL, DAG);
     SDValue SplattedIdx = DAG.getNode(RISCVISD::VMV_V_X_VL, DL, VT,
@@ -4506,7 +4519,7 @@ SDValue RISCVTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
                                    DAG.getConstant(1, DL, XLenVT));
 
     // Double the VL since we halved SEW.
-    SDValue VL = Op.getOperand(NumOps - (1 + OpOffset));
+    SDValue VL = getVLOperand(Op);
     SDValue I32VL =
         DAG.getNode(ISD::SHL, DL, XLenVT, VL, DAG.getConstant(1, DL, XLenVT));