[bindings/go] Add Go bindings for volatile loads/stores

[whitequark]

This one is fine, but note that I don't use Go and cannot review non-trivial Go patches.

[aykevl]

Thank you for reviewing! Is there anything I need to do now to get this merged? I'm new to LLVM development.

[xbolva00]

In D46235#1087787, @aykevl wrote:

Thank you for reviewing! Is there anything I need to do now to get this merged? I'm new to LLVM development.

Merged, thanks for your contribution :)

llvm/trunk/bindings/go/llvm/ir.go

 func PrevGlobal(v Value) (rv Value)       { rv.C = C.LLVMGetPreviousGlobal(v.C); return }
 func (v Value) EraseFromParentAsGlobal()  { C.LLVMDeleteGlobal(v.C) }
 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)) }
 
 // 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
 }