public void VisitNode(JSResultReferenceExpression rre)
{
var invocation = (rre.Referent as JSInvocationExpression);
// When passing a packed array element directly to a function, use a proxy instead.
// This allows hoisting to operate when the call is inside a loop, and it reduces GC pressure (since we basically make the struct unpack occur on-demand).
if (
(ParentNode is JSInvocationExpression) &&
(invocation != null) &&
(invocation.JSMethod != null) &&
invocation.JSMethod.Reference.FullName.Contains("JSIL.Runtime.IPackedArray") &&
invocation.JSMethod.Reference.FullName.Contains("get_Item(") &&
Configuration.CodeGenerator.AggressivelyUseElementProxies.GetValueOrDefault(false)
)
{
var elementType = invocation.GetActualType(TypeSystem);
var replacement = new JSNewPackedArrayElementProxy(
invocation.ThisReference, invocation.Arguments.First(),
elementType
);
ParentNode.ReplaceChild(rre, replacement);
VisitReplacement(replacement);
return;
}
VisitChildren(rre);
}
public void VisitNode(JSNewPackedArrayElementProxy npaep)
{
var isInsideLoop = (Stack.Any((node) => node is JSLoopStatement));
var parentInvocation = Stack.OfType <JSInvocationExpression>().FirstOrDefault();
var doesValueEscape = (parentInvocation != null) &&
DoesValueEscapeFromInvocation(parentInvocation, npaep, true);
if (
isInsideLoop &&
(
(parentInvocation == null) ||
!doesValueEscape
)
)
{
var replacement = CreateHoistedVariable(
(hoistedVariable) =>
new JSRetargetPackedArrayElementProxy(
hoistedVariable, npaep.Array, npaep.Index
),
npaep.GetActualType(TypeSystem),
npaep.Array,
npaep.Index,
npaep.MakeUntargeted()
);
ParentNode.ReplaceChild(npaep, replacement);
VisitReplacement(replacement);
}
VisitChildren(npaep);
}
public void VisitNode (JSResultReferenceExpression rre) {
var invocation = (rre.Referent as JSInvocationExpression);
// When passing a packed array element directly to a function, use a proxy instead.
// This allows hoisting to operate when the call is inside a loop, and it reduces GC pressure (since we basically make the struct unpack occur on-demand).
if (
(ParentNode is JSInvocationExpression) &&
(invocation != null) &&
(invocation.JSMethod != null) &&
invocation.JSMethod.Reference.FullName.Contains("JSIL.Runtime.IPackedArray") &&
invocation.JSMethod.Reference.FullName.Contains("get_Item(") &&
Configuration.CodeGenerator.AggressivelyUseElementProxies.GetValueOrDefault(false)
) {
var elementType = invocation.GetActualType(TypeSystem);
var replacement = new JSNewPackedArrayElementProxy(
invocation.ThisReference, invocation.Arguments.First(),
elementType
);
ParentNode.ReplaceChild(rre, replacement);
VisitReplacement(replacement);
return;
}
VisitChildren(rre);
}
public void VisitNode (JSNewPackedArrayElementProxy npaep) {
var isInsideLoop = (Stack.Any((node) => node is JSLoopStatement));
var parentInvocation = Stack.OfType<JSInvocationExpression>().FirstOrDefault();
var doesValueEscape = (parentInvocation != null) &&
DoesValueEscapeFromInvocation(parentInvocation, npaep, true);
if (
isInsideLoop &&
(
(parentInvocation == null) ||
!doesValueEscape
)
) {
var replacement = CreateHoistedVariable(
(hoistedVariable) =>
new JSRetargetPackedArrayElementProxy(
hoistedVariable, npaep.Array, npaep.Index
),
npaep.GetActualType(TypeSystem),
npaep.Array,
npaep.Index,
npaep.MakeUntargeted()
);
ParentNode.ReplaceChild(npaep, replacement);
VisitReplacement(replacement);
}
VisitChildren(npaep);
}
