[llvm] [RISCV] Add nf argument to VReg class instead overriding with a let. NFC (PR #131235)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-risc-v

Author: Craig Topper (topperc)

<details>
<summary>Changes</summary>

This treats nf consistently with LMul.

---
Full diff: https://github.com/llvm/llvm-project/pull/131235.diff


1 Files Affected:

- (modified) llvm/lib/Target/RISCV/RISCVRegisterInfo.td (+11-12) 


``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVRegisterInfo.td b/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
index bbb1e82fbadaa..5eb362156a644 100644
--- a/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
+++ b/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
@@ -713,12 +713,13 @@ foreach m = [1, 2, 4] in {
   }
 }
 
-class VReg<list<ValueType> regTypes, dag regList, int Vlmul>
+class VReg<list<ValueType> regTypes, dag regList, int Vlmul, int nf = 1>
     : RISCVRegisterClass<regTypes,
                          64, // The maximum supported ELEN is 64.
                          regList> {
   let IsVRegClass = 1;
   let VLMul = Vlmul;
+  let NF = nf;
 }
 
 defvar VMaskVTs = [vbool1_t, vbool2_t, vbool4_t, vbool8_t, vbool16_t,
@@ -799,17 +800,15 @@ class VTupRegList<int LMUL, int NF> {
 
 foreach m = LMULList in {
   foreach nf = NFList<m>.L in {
-    let NF = nf in {
-      def "VRN" # nf # "M" # m # "NoV0"
-        : VReg<VTupRegList<m, nf>.L,
-               (add !cast<RegisterTuples>("VN" # nf # "M" # m # "NoV0")),
-               m>;
-      def "VRN" # nf # "M" # m
-        : VReg<VTupRegList<m, nf>.L,
-               (add !cast<RegisterTuples>("VN" # nf # "M" # m # "NoV0"),
-                    !cast<RegisterTuples>("VN" # nf # "M" # m # "V0")),
-               m>;
-    }
+    def "VRN" # nf # "M" # m # "NoV0"
+      : VReg<VTupRegList<m, nf>.L,
+             (add !cast<RegisterTuples>("VN" # nf # "M" # m # "NoV0")),
+             m, nf>;
+    def "VRN" # nf # "M" # m
+      : VReg<VTupRegList<m, nf>.L,
+             (add !cast<RegisterTuples>("VN" # nf # "M" # m # "NoV0"),
+                  !cast<RegisterTuples>("VN" # nf # "M" # m # "V0")),
+             m, nf>;
   }
 }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/131235