[llvm] [RISCV][NFC] Remove duplicate setTargetDAGCombine registrations (PR #186928)

[Jim Lin via llvm-commits]

https://github.com/tclin914 created https://github.com/llvm/llvm-project/pull/186928

ISD::SRA and ISD::MUL are already registered unconditionally in the constructor, so remove the redundant registrations from the hasVInstructions() block. Fold the standalone SRA call into the existing brace-initializer list.

>From 9d098cc04585ecebb634c8e5fa207625c3598018 Mon Sep 17 00:00:00 2001
From: Jim Lin <jim at andestech.com>
Date: Tue, 17 Mar 2026 08:38:56 +0800
Subject: [PATCH] [RISCV][NFC] Remove duplicate setTargetDAGCombine
 registrations

ISD::SRA and ISD::MUL are already registered unconditionally in the
constructor, so remove the redundant registrations from the
hasVInstructions() block. Fold the standalone SRA call into the
existing brace-initializer list.

Co-Authored-By: Claude Opus 4.6 <noreply at anthropic.com>
---
 llvm/lib/Target/RISCV/RISCVISelLowering.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 7e0c6a6aedfcc..d76a251248f2e 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -1885,8 +1885,8 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
 
   setTargetDAGCombine({ISD::INTRINSIC_VOID, ISD::INTRINSIC_W_CHAIN,
                        ISD::INTRINSIC_WO_CHAIN, ISD::ADD, ISD::SUB, ISD::MUL,
-                       ISD::AND, ISD::OR, ISD::XOR, ISD::SETCC, ISD::SELECT});
-  setTargetDAGCombine(ISD::SRA);
+                       ISD::AND, ISD::OR, ISD::XOR, ISD::SETCC, ISD::SELECT,
+                       ISD::SRA});
   setTargetDAGCombine(ISD::SIGN_EXTEND_INREG);
 
   if (Subtarget.hasStdExtFOrZfinx())
@@ -1908,12 +1908,12 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
   if (Subtarget.hasVInstructions())
     setTargetDAGCombine(
         {ISD::FCOPYSIGN,    ISD::MGATHER,      ISD::MSCATTER,
-         ISD::VP_GATHER,    ISD::VP_SCATTER,   ISD::SRA,
-         ISD::SRL,          ISD::SHL,          ISD::STORE,
-         ISD::SPLAT_VECTOR, ISD::BUILD_VECTOR, ISD::CONCAT_VECTORS,
+         ISD::VP_GATHER,    ISD::VP_SCATTER,   ISD::SRL,
+         ISD::SHL,          ISD::STORE,        ISD::SPLAT_VECTOR,
+         ISD::BUILD_VECTOR, ISD::CONCAT_VECTORS,
          ISD::VP_STORE,     ISD::VP_TRUNCATE,  ISD::EXPERIMENTAL_VP_REVERSE,
-         ISD::MUL,          ISD::SDIV,         ISD::UDIV,
-         ISD::SREM,         ISD::UREM,         ISD::INSERT_VECTOR_ELT,
+         ISD::SDIV,         ISD::UDIV,         ISD::SREM,
+         ISD::UREM,         ISD::INSERT_VECTOR_ELT,
          ISD::ABS,          ISD::CTPOP,        ISD::VECTOR_SHUFFLE,
          ISD::FMA,          ISD::VSELECT,      ISD::VECREDUCE_ADD});