From cc1f17b1948dcd64741beefd69f69166b711ca67 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@sifive.com>
Date: Thu, 9 Jan 2025 10:35:12 -0800
Subject: [PATCH] [RISCV] Return MILog2SEW for mask instructions
 getOperandLog2EEW. NFC

The SEW operand for these instructions should have a value of 0.
This matches what was done for vcpop/vfirst.
---
 llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp b/llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp
index 9a0938bc38dd4..cab7f746ac933 100644
--- a/llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp
+++ b/llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp
@@ -633,7 +633,7 @@ getOperandLog2EEW(const MachineOperand &MO, const MachineRegisterInfo *MRI) {
   case RISCV::VMSBF_M:
   case RISCV::VMSIF_M:
   case RISCV::VMSOF_M: {
-    return 0;
+    return MILog2SEW;
   }
 
   // Vector Iota Instruction