private LLVMValueRef DeclareArrayLength(IMethod Method)
{
var arrayType = Method.DeclaringType.AsArrayType();
// Declare T[,...].Length.
var abi = LLVMSymbolTypeMember.GetLLVMAbi(Method, assembly);
var funcType = DeclarePrototype(Method);
var funcDef = AddFunction(module, abi.Mangler.Mangle(Method, true), funcType);
funcDef.SetLinkage(LLVMLinkage.LLVMWeakODRLinkage);
AddAttributeAtIndex(
funcDef,
LLVMAttributeIndex.LLVMAttributeFunctionIndex,
CreateEnumAttribute("nounwind"));
// Define T[,...].Length's body.
var codeGenerator = new Codegen.LLVMCodeGenerator(Method);
// T[,...].Length computes the product of all dimensions.
var dimensions = new ICodeBlock[arrayType.ArrayRank];
for (int i = 0; i < dimensions.Length; i++)
{
dimensions[i] = codeGenerator.EmitDereferencePointer(
new Codegen.GetDimensionPtrBlock(
codeGenerator,
(Codegen.CodeBlock)codeGenerator.GetThis().EmitGet(),
i));
}
var body = (Codegen.CodeBlock)codeGenerator.EmitReturn(codeGenerator.EmitProduct(dimensions));
// Emit T[,...].Length's body.
var bodyBuilder = new Codegen.FunctionBodyBuilder(this, funcDef);
var entryPointBuilder = bodyBuilder.AppendBasicBlock("entry");
entryPointBuilder = codeGenerator.Prologue.Emit(entryPointBuilder);
body.Emit(entryPointBuilder);
return(funcDef);
}