[llvm] fplower update (PR #128917)

[Brox Chen via llvm-commits]

https://github.com/broxigarchen updated https://github.com/llvm/llvm-project/pull/128917

>From 68955baef614f782fa71401aef600cc4f897355b Mon Sep 17 00:00:00 2001
From: guochen2 <guochen2 at amd.com>
Date: Wed, 5 Mar 2025 19:57:17 -0500
Subject: [PATCH] getregclassfor add t16

---
 llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index fe095414e5172..b6d1c401507c2 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -16965,6 +16965,8 @@ SITargetLowering::getRegClassFor(MVT VT, bool isDivergent) const {
   if (RC == &AMDGPU::VReg_1RegClass && !isDivergent)
     return Subtarget->isWave64() ? &AMDGPU::SReg_64RegClass
                                  : &AMDGPU::SReg_32RegClass;
+  if (VT == MVT::f16 && TRI->isVGPRClass(RC))
+    return RC;
   if (!TRI->isSGPRClass(RC) && !isDivergent)
     return TRI->getEquivalentSGPRClass(RC);
   if (TRI->isSGPRClass(RC) && isDivergent)