[PATCH] D105092: [RISCV] Add the tail policy argument to builtins/intrinsics.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/include/llvm/IR/IntrinsicsRISCV.td:169
+                     llvm_anyint_ty, LLVMMatchType<1>],
                     [NoCapture<ArgIndex<1>>, IntrReadMem]>, RISCVVIntrinsic;
   // For unit stride fault-only-first load with mask
----------------
This needs ImmArg<ArgIndex<4>>. Similar for the rest. That will guarantee it is a constant and will make SelectionDAGBuilder create a target constant instead of a regular constant.


================
Comment at: llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp:248
+    // Policy must be a constant.
+    auto *PolicyNode = cast<ConstantSDNode>(Node->getOperand(CurOp++));
+    SDValue PolicyOp =
----------------
Can we use

```
uint64_t Policy = Node->getConstantOperandVal(CurOp++);
```


================
Comment at: llvm/lib/Target/RISCV/RISCVISelLowering.cpp:4761
+  if (!IsUnmasked)
+    Ops.push_back(DAG.getConstant(RISCVII::TAIL_AGNOSTIC, DL, XLenVT));
 
----------------
TargetConstant?


================
Comment at: llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td:647
                    GPR:$rs1,
-                   VMaskOp:$vm, AVL:$vl, ixlenimm:$sew),[]>,
+                   VMaskOp:$vm, AVL:$vl, ixlenimm:$sew, uimm5:$policy),[]>,
       RISCVVPseudo,
----------------
Why uimm5? I think VPseudoTernaryNoMaskWithPolicy is using ixlenimm like $sew


Repository:
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  https://reviews.llvm.org/D105092/new/

https://reviews.llvm.org/D105092