[llvm] [AMDGPU] Fix the comment wrt SSrc_* RCs. NFC. (PR #153711)

[Stanislav Mekhanoshin via llvm-commits]

https://github.com/rampitec created https://github.com/llvm/llvm-project/pull/153711

None

>From 41c38af2572427ddf8c56929f64f3c71adb8ca69 Mon Sep 17 00:00:00 2001
From: Stanislav Mekhanoshin <Stanislav.Mekhanoshin at amd.com>
Date: Thu, 14 Aug 2025 16:37:20 -0700
Subject: [PATCH] [AMDGPU] Fix the comment wrt SSrc_* RCs. NFC.

---
 llvm/lib/Target/AMDGPU/SIRegisterInfo.td | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.td b/llvm/lib/Target/AMDGPU/SIRegisterInfo.td
index 81655f5a829fb..0293d4018770f 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.td
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.td
@@ -1166,7 +1166,8 @@ class RegOrImmOperand <RegisterClass RegClass, string OperandTypeName>
 }
 
 //===----------------------------------------------------------------------===//
-//  SSrc_* Operands with an SGPR or a 32-bit immediate
+//  SSrc_* Operands with an SGPR, a 32-bit immediate, or 64-bit immediate
+//  if supported by target.
 //===----------------------------------------------------------------------===//
 
 class SrcRegOrImm9<RegisterClass regClass, string operandType>