[llvm] AMDGPU: Remove AMDGPUInstrInfo class (PR #144984)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/144984

This was never constructed and only provided one static helper
function.

>From f8f7b73cb7adc0d2b70ca935a8e83cf580a62ef4 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Fri, 20 Jun 2025 14:49:55 +0900
Subject: [PATCH] AMDGPU: Remove AMDGPUInstrInfo class

This was never constructed and only provided one static helper
function.
---
 llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp         | 2 +-
 llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp         | 2 +-
 llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp            | 7 +------
 llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.h              | 9 ++-------
 llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp | 2 +-
 llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp     | 2 +-
 llvm/lib/Target/AMDGPU/SIISelLowering.cpp             | 2 +-
 7 files changed, 8 insertions(+), 18 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
index e52c2d7fde436..6e990cb2e160c 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
@@ -3936,7 +3936,7 @@ bool AMDGPUDAGToDAGISel::isUniformLoad(const SDNode *N) const {
   const auto *Ld = cast<LoadSDNode>(N);
 
   const MachineMemOperand *MMO = Ld->getMemOperand();
-  if (N->isDivergent() && !AMDGPUInstrInfo::isUniformMMO(MMO))
+  if (N->isDivergent() && !AMDGPU::isUniformMMO(MMO))
     return false;
 
   return MMO->getSize().hasValue() &&
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index c51cc2a2fe529..134adc681215f 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -848,7 +848,7 @@ bool AMDGPUTargetLowering::shouldReduceLoadWidth(
        AS == AMDGPUAS::CONSTANT_ADDRESS_32BIT ||
        (isa<LoadSDNode>(N) && AS == AMDGPUAS::GLOBAL_ADDRESS &&
         MN->isInvariant())) &&
-      AMDGPUInstrInfo::isUniformMMO(MN->getMemOperand()))
+      AMDGPU::isUniformMMO(MN->getMemOperand()))
     return false;
 
   // Don't produce extloads from sub 32-bit types. SI doesn't have scalar
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp
index 627ac6b0063e1..5085e86d71c97 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp
@@ -22,17 +22,12 @@
 
 using namespace llvm;
 
-// Pin the vtable to this file.
-//void AMDGPUInstrInfo::anchor() {}
-
-AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { }
-
 Intrinsic::ID AMDGPU::getIntrinsicID(const MachineInstr &I) {
   return I.getOperand(I.getNumExplicitDefs()).getIntrinsicID();
 }
 
 // TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence.
-bool AMDGPUInstrInfo::isUniformMMO(const MachineMemOperand *MMO) {
+bool AMDGPU::isUniformMMO(const MachineMemOperand *MMO) {
   const Value *Ptr = MMO->getValue();
   // UndefValue means this is a load of a kernel input.  These are uniform.
   // Sometimes LDS instructions have constant pointers.
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.h b/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.h
index e00c02cfdb864..0eb00cbc2f466 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.h
@@ -23,15 +23,10 @@ class GCNSubtarget;
 class MachineMemOperand;
 class MachineInstr;
 
-class AMDGPUInstrInfo {
-public:
-  explicit AMDGPUInstrInfo(const GCNSubtarget &st);
-
-  static bool isUniformMMO(const MachineMemOperand *MMO);
-};
-
 namespace AMDGPU {
 
+bool isUniformMMO(const MachineMemOperand *MMO);
+
 /// Return the intrinsic ID for opcodes with the G_AMDGPU_INTRIN_ prefix.
 ///
 /// These opcodes have an Intrinsic::ID operand similar to a GIntrinsic. But
diff --git a/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp b/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
index db3f6bd360b3b..a60855cc4f2d6 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
@@ -630,7 +630,7 @@ RegBankLegalizeRules::RegBankLegalizeRules(const GCNSubtarget &_ST,
   });
 
   Predicate isUniMMO([](const MachineInstr &MI) -> bool {
-    return AMDGPUInstrInfo::isUniformMMO(*MI.memoperands_begin());
+    return AMDGPU::isUniformMMO(*MI.memoperands_begin());
   });
 
   Predicate isConst([](const MachineInstr &MI) -> bool {
diff --git a/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
index 4391a48ff2b68..dca55dafcc5e3 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
@@ -463,7 +463,7 @@ bool AMDGPURegisterBankInfo::isScalarLoadLegal(const MachineInstr &MI) const {
          (IsConst || !MMO->isVolatile()) &&
          // Memory must be known constant, or not written before this load.
          (IsConst || MMO->isInvariant() || (MMO->getFlags() & MONoClobber)) &&
-         AMDGPUInstrInfo::isUniformMMO(MMO);
+         AMDGPU::isUniformMMO(MMO);
 }
 
 RegisterBankInfo::InstructionMappings
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index b1e77a282e415..07d79d677104a 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -10866,7 +10866,7 @@ SDValue SITargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
       (AS == AMDGPUAS::GLOBAL_ADDRESS &&
        Subtarget->getScalarizeGlobalBehavior() && Load->isSimple() &&
        isMemOpHasNoClobberedMemOperand(Load))) {
-    if ((!Op->isDivergent() || AMDGPUInstrInfo::isUniformMMO(MMO)) &&
+    if ((!Op->isDivergent() || AMDGPU::isUniformMMO(MMO)) &&
         Alignment >= Align(4) && NumElements < 32) {
       if (MemVT.isPow2VectorType() ||
           (Subtarget->hasScalarDwordx3Loads() && NumElements == 3))