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spirv: array, structs, bitcast, call

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Implements type lowering for arrays and structs, and implements instruction
lowering for bitcast and call. Bitcast currently naively maps to the OpBitcast
instruction - this is only valid for some primitive types, and should be
improved to work with composites.
This commit is contained in:
Robin Voetter
2022-11-26 16:51:53 +01:00
parent dae8b4c11f
commit 3f92eaceb6
4 changed files with 146 additions and 28 deletions
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17
src/codegen/spirv/Module.zig
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@@ -222,7 +222,7 @@ pub fn resolveType(self: *Module, ty: Type) !Type.Ref {
return @intToEnum(Type.Ref, result.index);
}
pub fn resolveTypeId(self: *Module, ty: Type) !IdRef {
pub fn resolveTypeId(self: *Module, ty: Type) !IdResultType {
const type_ref = try self.resolveType(ty);
return self.typeResultId(type_ref);
}
@@ -243,7 +243,7 @@ pub fn typeRefId(self: Module, type_ref: Type.Ref) IdRef {
/// Note: This function does not attempt to perform any validation on the type.
/// The type is emitted in a shallow fashion; any child types should already
/// be emitted at this point.
pub fn emitType(self: *Module, ty: Type) !IdResultType {
pub fn emitType(self: *Module, ty: Type) error{OutOfMemory}!IdResultType {
const result_id = self.allocId();
const ref_id = result_id.toRef();
const types = &self.sections.types_globals_constants;
@@ -347,10 +347,21 @@ pub fn emitType(self: *Module, ty: Type) !IdResultType {
.array => {
const info = ty.payload(.array);
assert(info.length != 0);
const size_type = Type.initTag(.u32);
const size_type_id = try self.resolveTypeId(size_type);
const length_id = self.allocId();
try types.emit(self.gpa, .OpConstant, .{
.id_result_type = size_type_id,
.id_result = length_id,
.value = .{ .uint32 = info.length },
});
try types.emit(self.gpa, .OpTypeArray, .{
.id_result = result_id,
.element_type = self.typeResultId(ty.childType()).toRef(),
.length = .{ .id = 0 }, // TODO: info.length must be emitted as constant!
.length = length_id.toRef(),
});
if (info.array_stride != 0) {
try annotations.decorate(self.gpa, ref_id, .{ .ArrayStride = .{ .array_stride = info.array_stride } });