[llvm] [RISCV] Remove unneeded unmasked patterns for vcpop_v and riscv_vfirst_vl. (PR #127435)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/127435

The pseudos have RISCVMaskedPseudo so I think we are able to convert the masked for to unmasked for automatically.

>From d11bcccfe43b7934cf687c171952093f86a45462 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Sun, 16 Feb 2025 20:27:02 -0800
Subject: [PATCH] [RISCV] Remove unneeded unmasked patterns for vcpop_v and
 riscv_vfirst_vl.

The pseudos have RISCVMaskedPseudo so I think we are able to convert
the masked for to unmasked for automatically.
---
 llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td b/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
index c914dc2ffbcd3..ffa3d3982647d 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
@@ -2701,20 +2701,12 @@ foreach mti = AllMasks in {
                    VR:$rs, VR:$rs, GPR:$vl, mti.Log2SEW)>;
 
     // 15.2 Vector count population in mask vcpop.m
-    def : Pat<(XLenVT (riscv_vcpop_vl (mti.Mask VR:$rs2), (mti.Mask true_mask),
-                                      VLOpFrag)),
-              (!cast<Instruction>("PseudoVCPOP_M_" # mti.BX)
-                   VR:$rs2, GPR:$vl, mti.Log2SEW)>;
     def : Pat<(XLenVT (riscv_vcpop_vl (mti.Mask VR:$rs2), (mti.Mask VMV0:$vm),
                                       VLOpFrag)),
               (!cast<Instruction>("PseudoVCPOP_M_" # mti.BX # "_MASK")
                    VR:$rs2, (mti.Mask VMV0:$vm), GPR:$vl, mti.Log2SEW)>;
 
     // 15.3 vfirst find-first-set mask bit
-    def : Pat<(XLenVT (riscv_vfirst_vl (mti.Mask VR:$rs2), (mti.Mask true_mask),
-                                      VLOpFrag)),
-              (!cast<Instruction>("PseudoVFIRST_M_" # mti.BX)
-                   VR:$rs2, GPR:$vl, mti.Log2SEW)>;
     def : Pat<(XLenVT (riscv_vfirst_vl (mti.Mask VR:$rs2), (mti.Mask VMV0:$vm),
                                       VLOpFrag)),
               (!cast<Instruction>("PseudoVFIRST_M_" # mti.BX # "_MASK")