[RISCV] Set SEW on VPseudoTernaryWithTailPolicy and VPseudoTernaryWithTailPolicyRoundingMode

[michaelmaitland]

Summary

The SEW field should be set here so llvm-mca can correctly resolve the
SchedClassID from the InversePseudosTable.

[michaelmaitland]

The reduction formula has a bug in it, and I plan to fix it in a follow up patch.

[michaelmaitland]

Add reduction instr between vsetvlis

[wangpc]

LGTM.

[michaelmaitland]

I removed test case as I plan on adding one that is more complete and shows the intended behavior more effectivley.

llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td

 
 multiclass VPseudoTernaryWithTailPolicy<VReg RetClass,
                                           RegisterClass Op1Class,
                                           DAGOperand Op2Class,
                                           LMULInfo MInfo,
                                           int sew,
                                           string Constraint = "",
                                           bit Commutable = 0> {
-  let VLMul = MInfo.value in {
+  let VLMul = MInfo.value, SEW=sew in {
     defvar mx = MInfo.MX;
     let isCommutable = Commutable in
     def "_" # mx # "_E" # sew : VPseudoTernaryNoMaskWithPolicy<RetClass, Op1Class, Op2Class, Constraint>;
     def "_" # mx # "_E" # sew # "_MASK" : VPseudoTernaryMaskPolicy<RetClass, Op1Class, Op2Class, Constraint>;
   }
 }
 
 multiclass VPseudoTernaryWithTailPolicyRoundingMode<VReg RetClass,
                                           RegisterClass Op1Class,
                                           DAGOperand Op2Class,
                                           LMULInfo MInfo,
                                           int sew,
                                           string Constraint = "",
                                           bit Commutable = 0> {
-  let VLMul = MInfo.value in {
+  let VLMul = MInfo.value, SEW=sew in {
     defvar mx = MInfo.MX;
     let isCommutable = Commutable in
     def "_" # mx # "_E" # sew
         : VPseudoTernaryNoMaskWithPolicyRoundingMode<RetClass, Op1Class,
                                                      Op2Class, Constraint>;
     def "_" # mx # "_E" # sew # "_MASK"
         : VPseudoTernaryMaskPolicyRoundingMode<RetClass, Op1Class,
                                                Op2Class, Constraint>;