[RISCV] Remove partially duplicate riscv_vfmv_v_f_vl patterns.

We had specific patterns for riscv_vfmv_v_f_vl in both RISCVInstrInfoVVLPatterns.td
and RISCVInstrInfoVSDPatterns.td.

The RISCVInstrInfoVSDPatterns.td patterns could only match if the
RISCVInstrInfoVVLPatterns.td failed. As far as I can tell this
would only happen if the predicate didn't match. Tweak the predicate
so the RISCVInstrInfoVVLPatterns.td can match in more cases.

Author: topperc

llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td

@@ -1472,26 +1472,6 @@ foreach fvtiToFWti = AllWidenableBFloatToFloatVectors in {
                 fvti.AVL, fvti.Log2SEW, TA_MA)>;
 }
 
-//===----------------------------------------------------------------------===//
-// Vector Splats
-//===----------------------------------------------------------------------===//
-
-foreach fvti = !listconcat(AllFloatVectors, AllBFloatVectors) in {
-  let Predicates = !listconcat(GetVTypePredicates<GetFpVTypeInfo<fvti>.Vti>.Predicates,
-                               GetVTypeScalarPredicates<fvti>.Predicates) in
-    def : Pat<(fvti.Vector (riscv_vfmv_v_f_vl undef, fvti.ScalarRegClass:$rs1, srcvalue)),
-              (!cast<Instruction>("PseudoVFMV_V_"#fvti.ScalarSuffix#"_"#fvti.LMul.MX)
-                (fvti.Vector (IMPLICIT_DEF)),
-                (fvti.Scalar fvti.ScalarRegClass:$rs1),
-                fvti.AVL, fvti.Log2SEW, TA_MA)>;
-  defvar ivti = GetIntVTypeInfo<fvti>.Vti;
-  let Predicates = GetVTypePredicates<ivti>.Predicates in
-    def : Pat<(fvti.Vector (SplatFPOp (fvti.Scalar fpimm0))),
-              (!cast<Instruction>("PseudoVMV_V_I_"#fvti.LMul.MX)
-                (fvti.Vector (IMPLICIT_DEF)),
-                0, fvti.AVL, fvti.Log2SEW, TA_MA)>;
-}
-
 //===----------------------------------------------------------------------===//
 // Vector Element Extracts
 //===----------------------------------------------------------------------===//

llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td

@@ -2654,8 +2654,8 @@ foreach fvti = !listconcat(AllFloatVectors, AllBFloatVectors) in {
 }
 
 foreach fvti = AllFloatVectors in {
-  let Predicates = !listconcat(GetVTypePredicates<fvti>.Predicates,
-                               GetVTypeScalarPredicates<fvti>.Predicates) in {
+  defvar ivti = GetIntVTypeInfo<fvti>.Vti;
+  let Predicates = GetVTypePredicates<ivti>.Predicates in {
     // 13.16. Vector Floating-Point Move Instruction
     // If we're splatting fpimm0, use vmv.v.x vd, x0.
     def : Pat<(fvti.Vector (riscv_vfmv_v_f_vl
@@ -2666,7 +2666,9 @@ foreach fvti = AllFloatVectors in {
                            fvti.Vector:$passthru, (fvti.Scalar (SelectFPImm (XLenVT GPR:$imm))), VLOpFrag)),
               (!cast<Instruction>("PseudoVMV_V_X_"#fvti.LMul.MX)
                $passthru, GPR:$imm, GPR:$vl, fvti.Log2SEW, TU_MU)>;
+  }
 
+  let Predicates = GetVTypePredicates<fvti>.Predicates in {
     def : Pat<(fvti.Vector (riscv_vfmv_v_f_vl
                            fvti.Vector:$passthru, (fvti.Scalar fvti.ScalarRegClass:$rs2), VLOpFrag)),
               (!cast<Instruction>("PseudoVFMV_V_" # fvti.ScalarSuffix # "_" #