[llvm] [AMDGPU] Remove `hasAtomicFaddRtnForTy` as it is not used anywhere (PR #82841)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Shilei Tian (shiltian)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/82841.diff


4 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp (-9) 
- (modified) llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.h (-2) 
- (modified) llvm/lib/Target/AMDGPU/SIISelLowering.cpp (-12) 
- (modified) llvm/lib/Target/AMDGPU/SIISelLowering.h (-1) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp b/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp
index 60b7813f240339..a98d4488bf77fe 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp
@@ -69,12 +69,3 @@ AMDGPU::getBaseWithConstantOffset(MachineRegisterInfo &MRI, Register Reg,
 
   return std::pair(Reg, 0);
 }
-
-bool AMDGPU::hasAtomicFaddRtnForTy(const GCNSubtarget &Subtarget,
-                                   const LLT &Ty) {
-  if (Ty == LLT::scalar(32))
-    return Subtarget.hasAtomicFaddRtnInsts();
-  if (Ty == LLT::fixed_vector(2, 16) || Ty == LLT::scalar(64))
-    return Subtarget.hasGFX90AInsts();
-  return false;
-}
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.h b/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.h
index 5ee888d9db001c..5972552b9a4fe8 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.h
@@ -26,8 +26,6 @@ std::pair<Register, unsigned>
 getBaseWithConstantOffset(MachineRegisterInfo &MRI, Register Reg,
                           GISelKnownBits *KnownBits = nullptr,
                           bool CheckNUW = false);
-
-bool hasAtomicFaddRtnForTy(const GCNSubtarget &Subtarget, const LLT &Ty);
 }
 }
 
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index d8f528d8661183..84ef9679ab9563 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -5310,18 +5310,6 @@ MachineBasicBlock *SITargetLowering::EmitInstrWithCustomInserter(
   }
 }
 
-bool SITargetLowering::hasAtomicFaddRtnForTy(SDValue &Op) const {
-  switch (Op.getValue(0).getSimpleValueType().SimpleTy) {
-  case MVT::f32:
-    return Subtarget->hasAtomicFaddRtnInsts();
-  case MVT::v2f16:
-  case MVT::f64:
-    return Subtarget->hasGFX90AInsts();
-  default:
-    return false;
-  }
-}
-
 bool SITargetLowering::enableAggressiveFMAFusion(EVT VT) const {
   // This currently forces unfolding various combinations of fsub into fma with
   // free fneg'd operands. As long as we have fast FMA (controlled by
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.h b/llvm/lib/Target/AMDGPU/SIISelLowering.h
index e436c23af5bcac..f6e1d198f40aec 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.h
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.h
@@ -436,7 +436,6 @@ class SITargetLowering final : public AMDGPUTargetLowering {
   EmitInstrWithCustomInserter(MachineInstr &MI,
                               MachineBasicBlock *BB) const override;
 
-  bool hasAtomicFaddRtnForTy(SDValue &Op) const;
   bool enableAggressiveFMAFusion(EVT VT) const override;
   bool enableAggressiveFMAFusion(LLT Ty) const override;
   EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,

``````````

</details>


https://github.com/llvm/llvm-project/pull/82841