diff options
Diffstat (limited to 'include/llvm/Target/TargetLowering.h')
| -rw-r--r-- | include/llvm/Target/TargetLowering.h | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h index ced1838521462..1ca32d4c35898 100644 --- a/include/llvm/Target/TargetLowering.h +++ b/include/llvm/Target/TargetLowering.h @@ -1396,7 +1396,10 @@ public: /// It is called by AtomicExpandPass before expanding an /// AtomicRMW/AtomicCmpXchg/AtomicStore/AtomicLoad /// if shouldInsertFencesForAtomic returns true. - /// RMW and CmpXchg set both IsStore and IsLoad to true. + /// + /// Inst is the original atomic instruction, prior to other expansions that + /// may be performed. + /// /// This function should either return a nullptr, or a pointer to an IR-level /// Instruction*. Even complex fence sequences can be represented by a /// single Instruction* through an intrinsic to be lowered later. @@ -1422,18 +1425,17 @@ public: /// seq_cst. But if they are lowered to monotonic accesses, no amount of /// IR-level fences can prevent it. /// @{ - virtual Instruction *emitLeadingFence(IRBuilder<> &Builder, - AtomicOrdering Ord, bool IsStore, - bool IsLoad) const { - if (isReleaseOrStronger(Ord) && IsStore) + virtual Instruction *emitLeadingFence(IRBuilder<> &Builder, Instruction *Inst, + AtomicOrdering Ord) const { + if (isReleaseOrStronger(Ord) && Inst->hasAtomicStore()) return Builder.CreateFence(Ord); else return nullptr; } virtual Instruction *emitTrailingFence(IRBuilder<> &Builder, - AtomicOrdering Ord, bool IsStore, - bool IsLoad) const { + Instruction *Inst, + AtomicOrdering Ord) const { if (isAcquireOrStronger(Ord)) return Builder.CreateFence(Ord); else @@ -2061,14 +2063,6 @@ public: return false; } - // Return true if the instruction that performs a << b actually performs - // a << (b % (sizeof(a) * 8)). - virtual bool supportsModuloShift(ISD::NodeType Inst, EVT ReturnType) const { - assert((Inst == ISD::SHL || Inst == ISD::SRA || Inst == ISD::SRL) && - "Expect a shift instruction"); - return false; - } - //===--------------------------------------------------------------------===// // Runtime Library hooks // |