[CodeGen] Refactor TLI/AtomicExpand interface to make LLSC explicit.

[oota-llvm.git] / lib / Target / AArch64 / AArch64ISelLowering.h

diff --git a/lib/Target/AArch64/AArch64ISelLowering.h b/lib/Target/AArch64/AArch64ISelLowering.h
index 7820112ab2c5edbb651f458a41df2c2fc2c76afd..a60c2a6315d513cb18d174b297b675d83c4144c7 100644 (file)
--- a/lib/Target/AArch64/AArch64ISelLowering.h
+++ b/lib/Target/AArch64/AArch64ISelLowering.h
@@ -66,10 +66,6 @@ enum NodeType : unsigned {
   // Floating point comparison
   FCMP,
 
-  // Floating point max and min instructions.
-  FMAX,
-  FMIN,
-
   // Scalar extract
   EXTR,
 
@@ -222,8 +218,6 @@ class AArch64Subtarget;
 class AArch64TargetMachine;
 
 class AArch64TargetLowering : public TargetLowering {
-  bool RequireStrictAlign;
-
 public:
   explicit AArch64TargetLowering(const TargetMachine &TM,
                                  const AArch64Subtarget &STI);
@@ -244,14 +238,7 @@ public:
   /// unaligned memory accesses of the specified type.
   bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace = 0,
                                       unsigned Align = 1,
-                                      bool *Fast = nullptr) const override {
-    if (RequireStrictAlign)
-      return false;
-    // FIXME: True for Cyclone, but not necessary others.
-    if (Fast)
-      *Fast = true;
-    return true;
-  }
+                                      bool *Fast = nullptr) const override;
 
   /// LowerOperation - Provide custom lowering hooks for some operations.
   SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
@@ -356,17 +343,19 @@ public:
   bool shouldConvertConstantLoadToIntImm(const APInt &Imm,
                                          Type *Ty) const override;
 
-  bool hasLoadLinkedStoreConditional() const override;
   Value *emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
                         AtomicOrdering Ord) const override;
   Value *emitStoreConditional(IRBuilder<> &Builder, Value *Val,
                               Value *Addr, AtomicOrdering Ord) const override;
 
-  bool shouldExpandAtomicLoadInIR(LoadInst *LI) const override;
+  TargetLoweringBase::AtomicExpansionKind
+  shouldExpandAtomicLoadInIR(LoadInst *LI) const override;
   bool shouldExpandAtomicStoreInIR(StoreInst *SI) const override;
-  TargetLoweringBase::AtomicRMWExpansionKind
+  TargetLoweringBase::AtomicExpansionKind
   shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override;
 
+  bool shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *AI) const override;
+
   bool useLoadStackGuardNode() const override;
   TargetLoweringBase::LegalizeTypeAction
   getPreferredVectorAction(EVT VT) const override;