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use super::{
analyzer::{FunctionInfo, GlobalUse},
Capabilities, Disalignment, FunctionError, ModuleInfo,
};
use crate::arena::{Handle, UniqueArena};
use crate::span::{AddSpan as _, MapErrWithSpan as _, SpanProvider as _, WithSpan};
use bit_set::BitSet;
const MAX_WORKGROUP_SIZE: u32 = 0x4000;
#[derive(Clone, Debug, thiserror::Error)]
#[cfg_attr(test, derive(PartialEq))]
pub enum GlobalVariableError {
#[error("Usage isn't compatible with address space {0:?}")]
InvalidUsage(crate::AddressSpace),
#[error("Type isn't compatible with address space {0:?}")]
InvalidType(crate::AddressSpace),
#[error("Type flags {seen:?} do not meet the required {required:?}")]
MissingTypeFlags {
required: super::TypeFlags,
seen: super::TypeFlags,
},
#[error("Capability {0:?} is not supported")]
UnsupportedCapability(Capabilities),
#[error("Binding decoration is missing or not applicable")]
InvalidBinding,
#[error("Alignment requirements for address space {0:?} are not met by {1:?}")]
Alignment(
crate::AddressSpace,
Handle<crate::Type>,
#[source] Disalignment,
),
#[error("Initializer must be an override-expression")]
InitializerExprType,
#[error("Initializer doesn't match the variable type")]
InitializerType,
#[error("Initializer can't be used with address space {0:?}")]
InitializerNotAllowed(crate::AddressSpace),
#[error("Storage address space doesn't support write-only access")]
StorageAddressSpaceWriteOnlyNotSupported,
}
#[derive(Clone, Debug, thiserror::Error)]
#[cfg_attr(test, derive(PartialEq))]
pub enum VaryingError {
#[error("The type {0:?} does not match the varying")]
InvalidType(Handle<crate::Type>),
#[error("The type {0:?} cannot be used for user-defined entry point inputs or outputs")]
NotIOShareableType(Handle<crate::Type>),
#[error("Interpolation is not valid")]
InvalidInterpolation,
#[error("Cannot combine {interpolation:?} interpolation with the {sampling:?} sample type")]
InvalidInterpolationSamplingCombination {
interpolation: crate::Interpolation,
sampling: crate::Sampling,
},
#[error("Interpolation must be specified on vertex shader outputs and fragment shader inputs")]
MissingInterpolation,
#[error("Built-in {0:?} is not available at this stage")]
InvalidBuiltInStage(crate::BuiltIn),
#[error("Built-in type for {0:?} is invalid")]
InvalidBuiltInType(crate::BuiltIn),
#[error("Entry point arguments and return values must all have bindings")]
MissingBinding,
#[error("Struct member {0} is missing a binding")]
MemberMissingBinding(u32),
#[error("Multiple bindings at location {location} are present")]
BindingCollision { location: u32 },
#[error("Built-in {0:?} is present more than once")]
DuplicateBuiltIn(crate::BuiltIn),
#[error("Capability {0:?} is not supported")]
UnsupportedCapability(Capabilities),
#[error("The attribute {0:?} is only valid as an output for stage {1:?}")]
InvalidInputAttributeInStage(&'static str, crate::ShaderStage),
#[error("The attribute {0:?} is not valid for stage {1:?}")]
InvalidAttributeInStage(&'static str, crate::ShaderStage),
#[error(
"The location index {location} cannot be used together with the attribute {attribute:?}"
)]
InvalidLocationAttributeCombination {
location: u32,
attribute: &'static str,
},
#[error("Workgroup size is multi dimensional, @builtin(subgroup_id) and @builtin(subgroup_invocation_id) are not supported.")]
InvalidMultiDimensionalSubgroupBuiltIn,
}
#[derive(Clone, Debug, thiserror::Error)]
#[cfg_attr(test, derive(PartialEq))]
pub enum EntryPointError {
#[error("Multiple conflicting entry points")]
Conflict,
#[error("Vertex shaders must return a `@builtin(position)` output value")]
MissingVertexOutputPosition,
#[error("Early depth test is not applicable")]
UnexpectedEarlyDepthTest,
#[error("Workgroup size is not applicable")]
UnexpectedWorkgroupSize,
#[error("Workgroup size is out of range")]
OutOfRangeWorkgroupSize,
#[error("Uses operations forbidden at this stage")]
ForbiddenStageOperations,
#[error("Global variable {0:?} is used incorrectly as {1:?}")]
InvalidGlobalUsage(Handle<crate::GlobalVariable>, GlobalUse),
#[error("More than 1 push constant variable is used")]
MoreThanOnePushConstantUsed,
#[error("Bindings for {0:?} conflict with other resource")]
BindingCollision(Handle<crate::GlobalVariable>),
#[error("Argument {0} varying error")]
Argument(u32, #[source] VaryingError),
#[error(transparent)]
Result(#[from] VaryingError),
#[error("Location {location} interpolation of an integer has to be flat")]
InvalidIntegerInterpolation { location: u32 },
#[error(transparent)]
Function(#[from] FunctionError),
#[error(
"Invalid locations {location_mask:?} are set while dual source blending. Only location 0 may be set."
)]
InvalidLocationsWhileDualSourceBlending { location_mask: BitSet },
}
fn storage_usage(access: crate::StorageAccess) -> GlobalUse {
let mut storage_usage = GlobalUse::QUERY;
if access.contains(crate::StorageAccess::LOAD) {
storage_usage |= GlobalUse::READ;
}
if access.contains(crate::StorageAccess::STORE) {
storage_usage |= GlobalUse::WRITE;
}
storage_usage
}
struct VaryingContext<'a> {
stage: crate::ShaderStage,
output: bool,
second_blend_source: bool,
types: &'a UniqueArena<crate::Type>,
type_info: &'a Vec<super::r#type::TypeInfo>,
location_mask: &'a mut BitSet,
built_ins: &'a mut crate::FastHashSet<crate::BuiltIn>,
capabilities: Capabilities,
flags: super::ValidationFlags,
}
impl VaryingContext<'_> {
fn validate_impl(
&mut self,
ep: &crate::EntryPoint,
ty: Handle<crate::Type>,
binding: &crate::Binding,
) -> Result<(), VaryingError> {
use crate::{BuiltIn as Bi, ShaderStage as St, TypeInner as Ti, VectorSize as Vs};
let ty_inner = &self.types[ty].inner;
match *binding {
crate::Binding::BuiltIn(built_in) => {
// Ignore the `invariant` field for the sake of duplicate checks,
// but use the original in error messages.
let canonical = if let crate::BuiltIn::Position { .. } = built_in {
crate::BuiltIn::Position { invariant: false }
} else {
built_in
};
if self.built_ins.contains(&canonical) {
return Err(VaryingError::DuplicateBuiltIn(built_in));
}
self.built_ins.insert(canonical);
let required = match built_in {
Bi::ClipDistance => Capabilities::CLIP_DISTANCE,
Bi::CullDistance => Capabilities::CULL_DISTANCE,
Bi::PrimitiveIndex => Capabilities::PRIMITIVE_INDEX,
Bi::ViewIndex => Capabilities::MULTIVIEW,
Bi::SampleIndex => Capabilities::MULTISAMPLED_SHADING,
Bi::NumSubgroups
| Bi::SubgroupId
| Bi::SubgroupSize
| Bi::SubgroupInvocationId => Capabilities::SUBGROUP,
_ => Capabilities::empty(),
};
if !self.capabilities.contains(required) {
return Err(VaryingError::UnsupportedCapability(required));
}
if matches!(
built_in,
crate::BuiltIn::SubgroupId | crate::BuiltIn::SubgroupInvocationId
) && ep.workgroup_size[1..].iter().any(|&s| s > 1)
{
return Err(VaryingError::InvalidMultiDimensionalSubgroupBuiltIn);
}
let (visible, type_good) = match built_in {
Bi::BaseInstance
| Bi::BaseVertex
| Bi::InstanceIndex
| Bi::VertexIndex
| Bi::DrawID => (
self.stage == St::Vertex && !self.output,
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
Bi::ClipDistance | Bi::CullDistance => (
self.stage == St::Vertex && self.output,
match *ty_inner {
Ti::Array { base, .. } => {
self.types[base].inner == Ti::Scalar(crate::Scalar::F32)
}
_ => false,
},
),
Bi::PointSize => (
self.stage == St::Vertex && self.output,
*ty_inner == Ti::Scalar(crate::Scalar::F32),
),
Bi::PointCoord => (
self.stage == St::Fragment && !self.output,
*ty_inner
== Ti::Vector {
size: Vs::Bi,
scalar: crate::Scalar::F32,
},
),
Bi::Position { .. } => (
match self.stage {
St::Vertex => self.output,
St::Fragment => !self.output,
St::Compute => false,
},
*ty_inner
== Ti::Vector {
size: Vs::Quad,
scalar: crate::Scalar::F32,
},
),
Bi::ViewIndex => (
match self.stage {
St::Vertex | St::Fragment => !self.output,
St::Compute => false,
},
*ty_inner == Ti::Scalar(crate::Scalar::I32),
),
Bi::FragDepth => (
self.stage == St::Fragment && self.output,
*ty_inner == Ti::Scalar(crate::Scalar::F32),
),
Bi::FrontFacing => (
self.stage == St::Fragment && !self.output,
*ty_inner == Ti::Scalar(crate::Scalar::BOOL),
),
Bi::PrimitiveIndex => (
self.stage == St::Fragment && !self.output,
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
Bi::SampleIndex => (
self.stage == St::Fragment && !self.output,
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
Bi::SampleMask => (
self.stage == St::Fragment,
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
Bi::LocalInvocationIndex => (
self.stage == St::Compute && !self.output,
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
Bi::GlobalInvocationId
| Bi::LocalInvocationId
| Bi::WorkGroupId
| Bi::WorkGroupSize
| Bi::NumWorkGroups => (
self.stage == St::Compute && !self.output,
*ty_inner
== Ti::Vector {
size: Vs::Tri,
scalar: crate::Scalar::U32,
},
),
Bi::NumSubgroups | Bi::SubgroupId => (
self.stage == St::Compute && !self.output,
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
Bi::SubgroupSize | Bi::SubgroupInvocationId => (
match self.stage {
St::Compute | St::Fragment => !self.output,
St::Vertex => false,
},
*ty_inner == Ti::Scalar(crate::Scalar::U32),
),
};
if !visible {
return Err(VaryingError::InvalidBuiltInStage(built_in));
}
if !type_good {
log::warn!("Wrong builtin type: {:?}", ty_inner);
return Err(VaryingError::InvalidBuiltInType(built_in));
}
}
crate::Binding::Location {
location,
interpolation,
sampling,
second_blend_source,
} => {
// Only IO-shareable types may be stored in locations.
if !self.type_info[ty.index()]
.flags
.contains(super::TypeFlags::IO_SHAREABLE)
{
return Err(VaryingError::NotIOShareableType(ty));
}
if second_blend_source {
if !self
.capabilities
.contains(Capabilities::DUAL_SOURCE_BLENDING)
{
return Err(VaryingError::UnsupportedCapability(
Capabilities::DUAL_SOURCE_BLENDING,
));
}
if self.stage != crate::ShaderStage::Fragment {
return Err(VaryingError::InvalidAttributeInStage(
"second_blend_source",
self.stage,
));
}
if !self.output {
return Err(VaryingError::InvalidInputAttributeInStage(
"second_blend_source",
self.stage,
));
}
if location != 0 {
return Err(VaryingError::InvalidLocationAttributeCombination {
location,
attribute: "second_blend_source",
});
}
self.second_blend_source = true;
} else if !self.location_mask.insert(location as usize) {
if self.flags.contains(super::ValidationFlags::BINDINGS) {
return Err(VaryingError::BindingCollision { location });
}
}
if let Some(interpolation) = interpolation {
let invalid_sampling = match (interpolation, sampling) {
(_, None)
| (
crate::Interpolation::Perspective | crate::Interpolation::Linear,
Some(
crate::Sampling::Center
| crate::Sampling::Centroid
| crate::Sampling::Sample,
),
)
| (
crate::Interpolation::Flat,
Some(crate::Sampling::First | crate::Sampling::Either),
) => None,
(_, Some(invalid_sampling)) => Some(invalid_sampling),
};
if let Some(sampling) = invalid_sampling {
return Err(VaryingError::InvalidInterpolationSamplingCombination {
interpolation,
sampling,
});
}
}
let needs_interpolation = match self.stage {
crate::ShaderStage::Vertex => self.output,
crate::ShaderStage::Fragment => !self.output,
crate::ShaderStage::Compute => false,
};
// It doesn't make sense to specify a sampling when `interpolation` is `Flat`, but
// SPIR-V and GLSL both explicitly tolerate such combinations of decorators /
// qualifiers, so we won't complain about that here.
let _ = sampling;
let required = match sampling {
Some(crate::Sampling::Sample) => Capabilities::MULTISAMPLED_SHADING,
_ => Capabilities::empty(),
};
if !self.capabilities.contains(required) {
return Err(VaryingError::UnsupportedCapability(required));
}
match ty_inner.scalar_kind() {
Some(crate::ScalarKind::Float) => {
if needs_interpolation && interpolation.is_none() {
return Err(VaryingError::MissingInterpolation);
}
}
Some(_) => {
if needs_interpolation && interpolation != Some(crate::Interpolation::Flat)
{
return Err(VaryingError::InvalidInterpolation);
}
}
None => return Err(VaryingError::InvalidType(ty)),
}
}
}
Ok(())
}
fn validate(
&mut self,
ep: &crate::EntryPoint,
ty: Handle<crate::Type>,
binding: Option<&crate::Binding>,
) -> Result<(), WithSpan<VaryingError>> {
let span_context = self.types.get_span_context(ty);
match binding {
Some(binding) => self
.validate_impl(ep, ty, binding)
.map_err(|e| e.with_span_context(span_context)),
None => {
match self.types[ty].inner {
crate::TypeInner::Struct { ref members, .. } => {
for (index, member) in members.iter().enumerate() {
let span_context = self.types.get_span_context(ty);
match member.binding {
None => {
if self.flags.contains(super::ValidationFlags::BINDINGS) {
return Err(VaryingError::MemberMissingBinding(
index as u32,
)
.with_span_context(span_context));
}
}
Some(ref binding) => self
.validate_impl(ep, member.ty, binding)
.map_err(|e| e.with_span_context(span_context))?,
}
}
}
_ => {
if self.flags.contains(super::ValidationFlags::BINDINGS) {
return Err(VaryingError::MissingBinding.with_span());
}
}
}
Ok(())
}
}
}
}
impl super::Validator {
pub(super) fn validate_global_var(
&self,
var: &crate::GlobalVariable,
gctx: crate::proc::GlobalCtx,
mod_info: &ModuleInfo,
global_expr_kind: &crate::proc::ExpressionKindTracker,
) -> Result<(), GlobalVariableError> {
use super::TypeFlags;
log::debug!("var {:?}", var);
let inner_ty = match gctx.types[var.ty].inner {
// A binding array is (mostly) supposed to behave the same as a
// series of individually bound resources, so we can (mostly)
// validate a `binding_array<T>` as if it were just a plain `T`.
crate::TypeInner::BindingArray { base, .. } => match var.space {
crate::AddressSpace::Storage { .. }
| crate::AddressSpace::Uniform
| crate::AddressSpace::Handle => base,
_ => return Err(GlobalVariableError::InvalidUsage(var.space)),
},
_ => var.ty,
};
let type_info = &self.types[inner_ty.index()];
let (required_type_flags, is_resource) = match var.space {
crate::AddressSpace::Function => {
return Err(GlobalVariableError::InvalidUsage(var.space))
}
crate::AddressSpace::Storage { access } => {
if let Err((ty_handle, disalignment)) = type_info.storage_layout {
if self.flags.contains(super::ValidationFlags::STRUCT_LAYOUTS) {
return Err(GlobalVariableError::Alignment(
var.space,
ty_handle,
disalignment,
));
}
}
if access == crate::StorageAccess::STORE {
return Err(GlobalVariableError::StorageAddressSpaceWriteOnlyNotSupported);
}
(
TypeFlags::DATA | TypeFlags::HOST_SHAREABLE | TypeFlags::CREATION_RESOLVED,
true,
)
}
crate::AddressSpace::Uniform => {
if let Err((ty_handle, disalignment)) = type_info.uniform_layout {
if self.flags.contains(super::ValidationFlags::STRUCT_LAYOUTS) {
return Err(GlobalVariableError::Alignment(
var.space,
ty_handle,
disalignment,
));
}
}
(
TypeFlags::DATA
| TypeFlags::COPY
| TypeFlags::SIZED
| TypeFlags::HOST_SHAREABLE
| TypeFlags::CREATION_RESOLVED,
true,
)
}
crate::AddressSpace::Handle => {
match gctx.types[inner_ty].inner {
crate::TypeInner::Image { class, .. } => match class {
crate::ImageClass::Storage {
format:
crate::StorageFormat::R16Unorm
| crate::StorageFormat::R16Snorm
| crate::StorageFormat::Rg16Unorm
| crate::StorageFormat::Rg16Snorm
| crate::StorageFormat::Rgba16Unorm
| crate::StorageFormat::Rgba16Snorm,
..
} => {
if !self
.capabilities
.contains(Capabilities::STORAGE_TEXTURE_16BIT_NORM_FORMATS)
{
return Err(GlobalVariableError::UnsupportedCapability(
Capabilities::STORAGE_TEXTURE_16BIT_NORM_FORMATS,
));
}
}
_ => {}
},
crate::TypeInner::Sampler { .. }
| crate::TypeInner::AccelerationStructure
| crate::TypeInner::RayQuery => {}
_ => {
return Err(GlobalVariableError::InvalidType(var.space));
}
}
(TypeFlags::empty(), true)
}
crate::AddressSpace::Private => (
TypeFlags::CONSTRUCTIBLE | TypeFlags::CREATION_RESOLVED,
false,
),
crate::AddressSpace::WorkGroup => (TypeFlags::DATA | TypeFlags::SIZED, false),
crate::AddressSpace::PushConstant => {
if !self.capabilities.contains(Capabilities::PUSH_CONSTANT) {
return Err(GlobalVariableError::UnsupportedCapability(
Capabilities::PUSH_CONSTANT,
));
}
(
TypeFlags::DATA
| TypeFlags::COPY
| TypeFlags::HOST_SHAREABLE
| TypeFlags::SIZED,
false,
)
}
};
if !type_info.flags.contains(required_type_flags) {
return Err(GlobalVariableError::MissingTypeFlags {
seen: type_info.flags,
required: required_type_flags,
});
}
if is_resource != var.binding.is_some() {
if self.flags.contains(super::ValidationFlags::BINDINGS) {
return Err(GlobalVariableError::InvalidBinding);
}
}
if let Some(init) = var.init {
match var.space {
crate::AddressSpace::Private | crate::AddressSpace::Function => {}
_ => {
return Err(GlobalVariableError::InitializerNotAllowed(var.space));
}
}
if !global_expr_kind.is_const_or_override(init) {
return Err(GlobalVariableError::InitializerExprType);
}
let decl_ty = &gctx.types[var.ty].inner;
let init_ty = mod_info[init].inner_with(gctx.types);
if !decl_ty.equivalent(init_ty, gctx.types) {
return Err(GlobalVariableError::InitializerType);
}
}
Ok(())
}
pub(super) fn validate_entry_point(
&mut self,
ep: &crate::EntryPoint,
module: &crate::Module,
mod_info: &ModuleInfo,
global_expr_kind: &crate::proc::ExpressionKindTracker,
) -> Result<FunctionInfo, WithSpan<EntryPointError>> {
if ep.early_depth_test.is_some() {
let required = Capabilities::EARLY_DEPTH_TEST;
if !self.capabilities.contains(required) {
return Err(
EntryPointError::Result(VaryingError::UnsupportedCapability(required))
.with_span(),
);
}
if ep.stage != crate::ShaderStage::Fragment {
return Err(EntryPointError::UnexpectedEarlyDepthTest.with_span());
}
}
if ep.stage == crate::ShaderStage::Compute {
if ep
.workgroup_size
.iter()
.any(|&s| s == 0 || s > MAX_WORKGROUP_SIZE)
{
return Err(EntryPointError::OutOfRangeWorkgroupSize.with_span());
}
} else if ep.workgroup_size != [0; 3] {
return Err(EntryPointError::UnexpectedWorkgroupSize.with_span());
}
let mut info = self
.validate_function(&ep.function, module, mod_info, true, global_expr_kind)
.map_err(WithSpan::into_other)?;
{
use super::ShaderStages;
let stage_bit = match ep.stage {
crate::ShaderStage::Vertex => ShaderStages::VERTEX,
crate::ShaderStage::Fragment => ShaderStages::FRAGMENT,
crate::ShaderStage::Compute => ShaderStages::COMPUTE,
};
if !info.available_stages.contains(stage_bit) {
return Err(EntryPointError::ForbiddenStageOperations.with_span());
}
}
self.location_mask.clear();
let mut argument_built_ins = crate::FastHashSet::default();
// TODO: add span info to function arguments
for (index, fa) in ep.function.arguments.iter().enumerate() {
let mut ctx = VaryingContext {
stage: ep.stage,
output: false,
second_blend_source: false,
types: &module.types,
type_info: &self.types,
location_mask: &mut self.location_mask,
built_ins: &mut argument_built_ins,
capabilities: self.capabilities,
flags: self.flags,
};
ctx.validate(ep, fa.ty, fa.binding.as_ref())
.map_err_inner(|e| EntryPointError::Argument(index as u32, e).with_span())?;
}
self.location_mask.clear();
if let Some(ref fr) = ep.function.result {
let mut result_built_ins = crate::FastHashSet::default();
let mut ctx = VaryingContext {
stage: ep.stage,
output: true,
second_blend_source: false,
types: &module.types,
type_info: &self.types,
location_mask: &mut self.location_mask,
built_ins: &mut result_built_ins,
capabilities: self.capabilities,
flags: self.flags,
};
ctx.validate(ep, fr.ty, fr.binding.as_ref())
.map_err_inner(|e| EntryPointError::Result(e).with_span())?;
if ctx.second_blend_source {
// Only the first location may be used when dual source blending
if ctx.location_mask.len() == 1 && ctx.location_mask.contains(0) {
info.dual_source_blending = true;
} else {
return Err(EntryPointError::InvalidLocationsWhileDualSourceBlending {
location_mask: self.location_mask.clone(),
}
.with_span());
}
}
if ep.stage == crate::ShaderStage::Vertex
&& !result_built_ins.contains(&crate::BuiltIn::Position { invariant: false })
{
return Err(EntryPointError::MissingVertexOutputPosition.with_span());
}
} else if ep.stage == crate::ShaderStage::Vertex {
return Err(EntryPointError::MissingVertexOutputPosition.with_span());
}
{
let mut used_push_constants = module
.global_variables
.iter()
.filter(|&(_, var)| var.space == crate::AddressSpace::PushConstant)
.map(|(handle, _)| handle)
.filter(|&handle| !info[handle].is_empty());
// Check if there is more than one push constant, and error if so.
// Use a loop for when returning multiple errors is supported.
if let Some(handle) = used_push_constants.nth(1) {
return Err(EntryPointError::MoreThanOnePushConstantUsed
.with_span_handle(handle, &module.global_variables));
}
}
self.ep_resource_bindings.clear();
for (var_handle, var) in module.global_variables.iter() {
let usage = info[var_handle];
if usage.is_empty() {
continue;
}
let allowed_usage = match var.space {
crate::AddressSpace::Function => unreachable!(),
crate::AddressSpace::Uniform => GlobalUse::READ | GlobalUse::QUERY,
crate::AddressSpace::Storage { access } => storage_usage(access),
crate::AddressSpace::Handle => match module.types[var.ty].inner {
crate::TypeInner::BindingArray { base, .. } => match module.types[base].inner {
crate::TypeInner::Image {
class: crate::ImageClass::Storage { access, .. },
..
} => storage_usage(access),
_ => GlobalUse::READ | GlobalUse::QUERY,
},
crate::TypeInner::Image {
class: crate::ImageClass::Storage { access, .. },
..
} => storage_usage(access),
_ => GlobalUse::READ | GlobalUse::QUERY,
},
crate::AddressSpace::Private | crate::AddressSpace::WorkGroup => GlobalUse::all(),
crate::AddressSpace::PushConstant => GlobalUse::READ,
};
if !allowed_usage.contains(usage) {
log::warn!("\tUsage error for: {:?}", var);
log::warn!(
"\tAllowed usage: {:?}, requested: {:?}",
allowed_usage,
usage
);
return Err(EntryPointError::InvalidGlobalUsage(var_handle, usage)
.with_span_handle(var_handle, &module.global_variables));
}
if let Some(ref bind) = var.binding {
if !self.ep_resource_bindings.insert(bind.clone()) {
if self.flags.contains(super::ValidationFlags::BINDINGS) {
return Err(EntryPointError::BindingCollision(var_handle)
.with_span_handle(var_handle, &module.global_variables));
}
}
}
}
Ok(info)
}
}