[Clang][RISCV] Add vcreate intrinsics for RVV tuple types

Specification PR: riscv-non-isa/rvv-intrinsic-doc#256

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D158402

Author: eopXD

clang/include/clang/Basic/riscv_vector.td

@@ -2817,4 +2817,30 @@ let HasMasked = false, HasVL = false, IRName = "" in {
       def : RVVBuiltin<"Uv" # T # "Uv", T # "Uv" # T # "UvKzUv", "csil">;
     }
   }
+
+  let Name = "vcreate_v",
+      UnMaskedPolicyScheme = NonePolicy,
+      MaskedPolicyScheme = NonePolicy,
+      SupportOverloading = false,
+      ManualCodegen = [{
+      {
+        assert(isa<StructType>(ResultType));
+        unsigned NF = cast<StructType>(ResultType)->getNumElements();
+        llvm::Value *ReturnTuple = llvm::PoisonValue::get(ResultType);
+        for (unsigned I = 0; I < NF; ++I) {
+          ReturnTuple = Builder.CreateInsertValue(ReturnTuple, Ops[I], {I});
+        }
+        return ReturnTuple;
+      }
+      }] in {
+    foreach nf = NFList in {
+      let NF = nf in {
+        defvar T = "(Tuple:" # nf # ")";
+        defvar V = VString<nf, /*signed=*/true>.S;
+        defvar UV = VString<nf, /*signed=*/false>.S;
+        def : RVVBuiltin<T # "v", T # "v" # V, "csilxfd">;
+        def : RVVBuiltin<T # "Uv", T # "Uv" # UV, "csil">;
+      }
+    }
+  }
 }

clang/lib/Sema/SemaRISCVVectorLookup.cpp

@@ -227,11 +227,12 @@ void RISCVIntrinsicManagerImpl::ConstructRVVIntrinsics(
             /*HasMaskedOffOperand=*/false, Record.HasVL, Record.NF,
             UnMaskedPolicyScheme, DefaultPolicy, Record.IsTuple);
 
-    llvm::SmallVector<PrototypeDescriptor> ProtoMaskSeq =
-        RVVIntrinsic::computeBuiltinTypes(
-            BasicProtoSeq, /*IsMasked=*/true, Record.HasMaskedOffOperand,
-            Record.HasVL, Record.NF, MaskedPolicyScheme, DefaultPolicy,
-            Record.IsTuple);
+    llvm::SmallVector<PrototypeDescriptor> ProtoMaskSeq;
+    if (Record.HasMasked)
+      ProtoMaskSeq = RVVIntrinsic::computeBuiltinTypes(
+          BasicProtoSeq, /*IsMasked=*/true, Record.HasMaskedOffOperand,
+          Record.HasVL, Record.NF, MaskedPolicyScheme, DefaultPolicy,
+          Record.IsTuple);
 
     bool UnMaskedHasPolicy = UnMaskedPolicyScheme != PolicyScheme::SchemeNone;
     bool MaskedHasPolicy = MaskedPolicyScheme != PolicyScheme::SchemeNone;