[AMDGPU] More descriptive names in the memory legalizer

NFC.

Differential Revision: https://reviews.llvm.org/D43054

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324712 91177308-0d34-0410-b5e6-96231b3b80d8

Author: rampitec

lib/Target/AMDGPU/SIMemoryLegalizer.cpp

@@ -107,7 +107,7 @@ class SIMemOpInfo final {
       const MachineBasicBlock::iterator &MI);
   /// \returns Atomic cmpxchg/rmw info if \p MI is an atomic cmpxchg or
   /// rmw operation, "None" otherwise.
-  static Optional<SIMemOpInfo> getAtomicCmpxchgInfo(
+  static Optional<SIMemOpInfo> getAtomicCmpxchgOrRmwInfo(
       const MachineBasicBlock::iterator &MI);
 
   /// \brief Reports unknown synchronization scope used in \p MI to LLVM
@@ -128,7 +128,7 @@ class SIMemoryLegalizer final : public MachineFunctionPass {
   unsigned Vmcnt0Immediate = 0;
 
   /// \brief Opcode for cache invalidation instruction (L1).
-  unsigned Wbinvl1Opcode = 0;
+  unsigned VmemSIMDCacheInvalidateOpc = 0;
 
   /// \brief List of atomic pseudo instructions.
   std::list<MachineBasicBlock::iterator> AtomicPseudoMIs;
@@ -163,8 +163,8 @@ class SIMemoryLegalizer final : public MachineFunctionPass {
 
   /// \brief Inserts "buffer_wbinvl1_vol" instruction \p Before or after \p MI.
   /// Always returns true.
-  bool insertBufferWbinvl1Vol(MachineBasicBlock::iterator &MI,
-                              bool Before = true) const;
+  bool insertVmemSIMDCacheInvalidate(MachineBasicBlock::iterator &MI,
+                                     bool Before = true) const;
   /// \brief Inserts "s_waitcnt vmcnt(0)" instruction \p Before or after \p MI.
   /// Always returns true.
   bool insertWaitcntVmcnt0(MachineBasicBlock::iterator &MI,
@@ -188,8 +188,8 @@ class SIMemoryLegalizer final : public MachineFunctionPass {
                          MachineBasicBlock::iterator &MI);
   /// \brief Expands atomic cmpxchg or rmw operation \p MI. Returns true if
   /// instructions are added/deleted or \p MI is modified, false otherwise.
-  bool expandAtomicCmpxchg(const SIMemOpInfo &MOI,
-                           MachineBasicBlock::iterator &MI);
+  bool expandAtomicCmpxchgOrRmw(const SIMemOpInfo &MOI,
+                                MachineBasicBlock::iterator &MI);
 
 public:
   static char ID;
@@ -297,7 +297,7 @@ Optional<SIMemOpInfo> SIMemOpInfo::getAtomicFenceInfo(
 }
 
 /* static */
-Optional<SIMemOpInfo> SIMemOpInfo::getAtomicCmpxchgInfo(
+Optional<SIMemOpInfo> SIMemOpInfo::getAtomicCmpxchgOrRmwInfo(
     const MachineBasicBlock::iterator &MI) {
   assert(MI->getDesc().TSFlags & SIInstrFlags::maybeAtomic);
 
@@ -322,15 +322,15 @@ void SIMemOpInfo::reportUnknownSyncScope(
   CTX->diagnose(Diag);
 }
 
-bool SIMemoryLegalizer::insertBufferWbinvl1Vol(MachineBasicBlock::iterator &MI,
-                                               bool Before) const {
+bool SIMemoryLegalizer::insertVmemSIMDCacheInvalidate(
+  MachineBasicBlock::iterator &MI, bool Before) const {
   MachineBasicBlock &MBB = *MI->getParent();
   DebugLoc DL = MI->getDebugLoc();
 
   if (!Before)
     ++MI;
 
-  BuildMI(MBB, MI, DL, TII->get(Wbinvl1Opcode));
+  BuildMI(MBB, MI, DL, TII->get(VmemSIMDCacheInvalidateOpc));
 
   if (!Before)
     --MI;
@@ -385,7 +385,7 @@ bool SIMemoryLegalizer::expandLoad(const SIMemOpInfo &MOI,
       if (MOI.getOrdering() == AtomicOrdering::Acquire ||
           MOI.getOrdering() == AtomicOrdering::SequentiallyConsistent) {
         Changed |= insertWaitcntVmcnt0(MI, false);
-        Changed |= insertBufferWbinvl1Vol(MI, false);
+        Changed |= insertVmemSIMDCacheInvalidate(MI, false);
       }
 
       return Changed;
@@ -463,7 +463,7 @@ bool SIMemoryLegalizer::expandAtomicFence(const SIMemOpInfo &MOI,
       if (MOI.getOrdering() == AtomicOrdering::Acquire ||
           MOI.getOrdering() == AtomicOrdering::AcquireRelease ||
           MOI.getOrdering() == AtomicOrdering::SequentiallyConsistent)
-        Changed |= insertBufferWbinvl1Vol(MI);
+        Changed |= insertVmemSIMDCacheInvalidate(MI);
 
       AtomicPseudoMIs.push_back(MI);
       return Changed;
@@ -482,8 +482,8 @@ bool SIMemoryLegalizer::expandAtomicFence(const SIMemOpInfo &MOI,
   return Changed;
 }
 
-bool SIMemoryLegalizer::expandAtomicCmpxchg(const SIMemOpInfo &MOI,
-                                            MachineBasicBlock::iterator &MI) {
+bool SIMemoryLegalizer::expandAtomicCmpxchgOrRmw(const SIMemOpInfo &MOI,
+  MachineBasicBlock::iterator &MI) {
   assert(MI->mayLoad() && MI->mayStore());
 
   bool Changed = false;
@@ -503,7 +503,7 @@ bool SIMemoryLegalizer::expandAtomicCmpxchg(const SIMemOpInfo &MOI,
           MOI.getFailureOrdering() == AtomicOrdering::Acquire ||
           MOI.getFailureOrdering() == AtomicOrdering::SequentiallyConsistent) {
         Changed |= insertWaitcntVmcnt0(MI, false);
-        Changed |= insertBufferWbinvl1Vol(MI, false);
+        Changed |= insertVmemSIMDCacheInvalidate(MI, false);
       }
 
       return Changed;
@@ -532,8 +532,9 @@ bool SIMemoryLegalizer::runOnMachineFunction(MachineFunction &MF) {
 
   Vmcnt0Immediate =
       AMDGPU::encodeWaitcnt(IV, 0, getExpcntBitMask(IV), getLgkmcntBitMask(IV));
-  Wbinvl1Opcode = ST.getGeneration() <= AMDGPUSubtarget::SOUTHERN_ISLANDS ?
-      AMDGPU::BUFFER_WBINVL1 : AMDGPU::BUFFER_WBINVL1_VOL;
+  VmemSIMDCacheInvalidateOpc =
+     ST.getGeneration() <= AMDGPUSubtarget::SOUTHERN_ISLANDS ?
+       AMDGPU::BUFFER_WBINVL1 : AMDGPU::BUFFER_WBINVL1_VOL;
 
   for (auto &MBB : MF) {
     for (auto MI = MBB.begin(); MI != MBB.end(); ++MI) {
@@ -546,8 +547,8 @@ bool SIMemoryLegalizer::runOnMachineFunction(MachineFunction &MF) {
         Changed |= expandStore(MOI.getValue(), MI);
       else if (const auto &MOI = SIMemOpInfo::getAtomicFenceInfo(MI))
         Changed |= expandAtomicFence(MOI.getValue(), MI);
-      else if (const auto &MOI = SIMemOpInfo::getAtomicCmpxchgInfo(MI))
-        Changed |= expandAtomicCmpxchg(MOI.getValue(), MI);
+      else if (const auto &MOI = SIMemOpInfo::getAtomicCmpxchgOrRmwInfo(MI))
+        Changed |= expandAtomicCmpxchgOrRmw(MOI.getValue(), MI);
     }
   }