[llvm] [RISCV] Move Size and CopyCost overrides for vector register to the VReg class. NFC (PR #131222)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/131222

Instead using the IsVRegClass to calculate in the base class, just override directly.

This will scale better if we need to do different types of overrides for other register types in the future.

>From 45610ce0bb43bb2b005e1fd66bd4a993eeebd063 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Thu, 13 Mar 2025 14:35:29 -0700
Subject: [PATCH] [RISCV] Move Size and CopyCost overrides for vector register
 to the VReg class. NFC

Instead using the IsVRegClass to calculate in the base class, just
override directly.

This will scale better if we need to do different types of overrides
for other register types in the future.
---
 llvm/lib/Target/RISCV/RISCVRegisterInfo.td | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/RISCV/RISCVRegisterInfo.td b/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
index bbb1e82fbadaa..22f218b982440 100644
--- a/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
+++ b/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
@@ -225,9 +225,6 @@ class RISCVRegisterClass<list<ValueType> regTypes, int align, dag regList>
   int VLMul = 1;
   int NF = 1;
 
-  let Size = !if(IsVRegClass, !mul(VLMul, NF, 64), 0);
-  let CopyCost = !if(IsVRegClass, !mul(VLMul, NF), 1);
-
   let TSFlags{0} = IsVRegClass;
   let TSFlags{3-1} = !logtwo(VLMul);
   let TSFlags{6-4} = !sub(NF, 1);
@@ -719,6 +716,9 @@ class VReg<list<ValueType> regTypes, dag regList, int Vlmul>
                          regList> {
   let IsVRegClass = 1;
   let VLMul = Vlmul;
+
+  let Size = !mul(VLMul, NF, 64);
+  let CopyCost = !mul(VLMul, NF);
 }
 
 defvar VMaskVTs = [vbool1_t, vbool2_t, vbool4_t, vbool8_t, vbool16_t,