[bindings/go] Add wrappers for atomic operations.

[aykevl]

Summary

This patch adds Go bindings for atomic operations in LLVM.

[whitequark]

LGTM

[aykevl]

Great!
Can someone merge this commit? I do not have commit access.

bindings/go/llvm/ir.go

type (
   }
   Metadata struct {
     C C.LLVMMetadataRef
   }
   Attribute struct {
     C C.LLVMAttributeRef
   }
   Opcode              C.LLVMOpcode
+  AtomicRMWBinOp      C.LLVMAtomicRMWBinOp
+  AtomicOrdering      C.LLVMAtomicOrdering
   TypeKind            C.LLVMTypeKind
   Linkage             C.LLVMLinkage
   Visibility          C.LLVMVisibility
   CallConv            C.LLVMCallConv
   ComdatSelectionKind C.LLVMComdatSelectionKind
   IntPredicate        C.LLVMIntPredicate
   FloatPredicate      C.LLVMRealPredicate
   LandingPadClause    C.LLVMLandingPadClauseTy
const (
   VAArg          Opcode = C.LLVMVAArg
   ExtractElement Opcode = C.LLVMExtractElement
   InsertElement  Opcode = C.LLVMInsertElement
   ShuffleVector  Opcode = C.LLVMShuffleVector
   ExtractValue   Opcode = C.LLVMExtractValue
   InsertValue    Opcode = C.LLVMInsertValue
 )
 
+const (
+  AtomicRMWBinOpXchg AtomicRMWBinOp = C.LLVMAtomicRMWBinOpXchg
+  AtomicRMWBinOpAdd  AtomicRMWBinOp = C.LLVMAtomicRMWBinOpAdd
+  AtomicRMWBinOpSub  AtomicRMWBinOp = C.LLVMAtomicRMWBinOpSub
+  AtomicRMWBinOpAnd  AtomicRMWBinOp = C.LLVMAtomicRMWBinOpAnd
+  AtomicRMWBinOpNand AtomicRMWBinOp = C.LLVMAtomicRMWBinOpNand
+  AtomicRMWBinOpOr   AtomicRMWBinOp = C.LLVMAtomicRMWBinOpOr
+  AtomicRMWBinOpXor  AtomicRMWBinOp = C.LLVMAtomicRMWBinOpXor
+  AtomicRMWBinOpMax  AtomicRMWBinOp = C.LLVMAtomicRMWBinOpMax
+  AtomicRMWBinOpMin  AtomicRMWBinOp = C.LLVMAtomicRMWBinOpMin
+  AtomicRMWBinOpUMax AtomicRMWBinOp = C.LLVMAtomicRMWBinOpUMax
+  AtomicRMWBinOpUMin AtomicRMWBinOp = C.LLVMAtomicRMWBinOpUMin
+)
+
+const (
+  AtomicOrderingNotAtomic              AtomicOrdering = C.LLVMAtomicOrderingNotAtomic
+  AtomicOrderingUnordered              AtomicOrdering = C.LLVMAtomicOrderingUnordered
+  AtomicOrderingMonotonic              AtomicOrdering = C.LLVMAtomicOrderingMonotonic
+  AtomicOrderingAcquire                AtomicOrdering = C.LLVMAtomicOrderingAcquire
+  AtomicOrderingRelease                AtomicOrdering = C.LLVMAtomicOrderingRelease
+  AtomicOrderingAcquireRelease         AtomicOrdering = C.LLVMAtomicOrderingAcquireRelease
+  AtomicOrderingSequentiallyConsistent AtomicOrdering = C.LLVMAtomicOrderingSequentiallyConsistent
+)
+
 //-------------------------------------------------------------------------
 // llvm.TypeKind
 //-------------------------------------------------------------------------
 
 const (
   VoidTypeKind      TypeKind = C.LLVMVoidTypeKind
   FloatTypeKind     TypeKind = C.LLVMFloatTypeKind
   DoubleTypeKind    TypeKind = C.LLVMDoubleTypeKind

 func (v Value) Initializer() (rv Value)   { rv.C = C.LLVMGetInitializer(v.C); return }
 func (v Value) SetInitializer(cv Value)   { C.LLVMSetInitializer(v.C, cv.C) }
 func (v Value) IsThreadLocal() bool       { return C.LLVMIsThreadLocal(v.C) != 0 }
 func (v Value) SetThreadLocal(tl bool)    { C.LLVMSetThreadLocal(v.C, boolToLLVMBool(tl)) }
 func (v Value) IsGlobalConstant() bool    { return C.LLVMIsGlobalConstant(v.C) != 0 }
 func (v Value) SetGlobalConstant(gc bool) { C.LLVMSetGlobalConstant(v.C, boolToLLVMBool(gc)) }
 func (v Value) IsVolatile() bool          { return C.LLVMGetVolatile(v.C) != 0 }
 func (v Value) SetVolatile(volatile bool) { C.LLVMSetVolatile(v.C, boolToLLVMBool(volatile)) }
+func (v Value) Ordering() AtomicOrdering  { return AtomicOrdering(C.LLVMGetOrdering(v.C)) }
+func (v Value) SetOrdering(ordering AtomicOrdering) {
+  C.LLVMSetOrdering(v.C, C.LLVMAtomicOrdering(ordering))
+}
+func (v Value) IsAtomicSingleThread() bool { return C.LLVMIsAtomicSingleThread(v.C) != 0 }
+func (v Value) SetAtomicSingleThread(singleThread bool) {
+  C.LLVMSetAtomicSingleThread(v.C, boolToLLVMBool(singleThread))
+}
+func (v Value) CmpXchgSuccessOrdering() AtomicOrdering {
+  return AtomicOrdering(C.LLVMGetCmpXchgSuccessOrdering(v.C))
+}
+func (v Value) SetCmpXchgSuccessOrdering(ordering AtomicOrdering) {
+  C.LLVMSetCmpXchgSuccessOrdering(v.C, C.LLVMAtomicOrdering(ordering))
+}
+func (v Value) CmpXchgFailureOrdering() AtomicOrdering {
+  return AtomicOrdering(C.LLVMGetCmpXchgFailureOrdering(v.C))
+}
+func (v Value) SetCmpXchgFailureOrdering(ordering AtomicOrdering) {
+  C.LLVMSetCmpXchgFailureOrdering(v.C, C.LLVMAtomicOrdering(ordering))
+}
 
 // Operations on aliases
 func AddAlias(m Module, t Type, aliasee Value, name string) (v Value) {
   cname := C.CString(name)
   defer C.free(unsafe.Pointer(cname))
   v.C = C.LLVMAddAlias(m.C, t.C, aliasee.C, cname)
   return
 }

 func (b Builder) CreateGlobalStringPtr(str, name string) (v Value) {
   cstr := C.CString(str)
   defer C.free(unsafe.Pointer(cstr))
   cname := C.CString(name)
   defer C.free(unsafe.Pointer(cname))
   v.C = C.LLVMBuildGlobalStringPtr(b.C, cstr, cname)
   return
 }
+func (b Builder) CreateAtomicRMW(op AtomicRMWBinOp, ptr, val Value, ordering AtomicOrdering, singleThread bool) (v Value) {
+  v.C = C.LLVMBuildAtomicRMW(b.C, C.LLVMAtomicRMWBinOp(op), ptr.C, val.C, C.LLVMAtomicOrdering(ordering), boolToLLVMBool(singleThread))
+  return
+}
+func (b Builder) CreateAtomicCmpXchg(ptr, cmp, newVal Value, successOrdering, failureOrdering AtomicOrdering, singleThread bool) (v Value) {
+  v.C = C.LLVMBuildAtomicCmpXchg(b.C, ptr.C, cmp.C, newVal.C, C.LLVMAtomicOrdering(successOrdering), C.LLVMAtomicOrdering(failureOrdering), boolToLLVMBool(singleThread))
+  return
+}
 
 // Casts
 func (b Builder) CreateTrunc(val Value, t Type, name string) (v Value) {
   cname := C.CString(name)
   defer C.free(unsafe.Pointer(cname))
   v.C = C.LLVMBuildTrunc(b.C, val.C, t.C, cname)
   return
 }