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spirv: slice constants

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Implements lowering slice constants in the SPIR-V backend
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Robin Voetter 2022-12-11 13:39:29 +01:00
parent e788dfa142
commit 12a3a8b100
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GPG Key ID: E755662F227CB468
1 changed files with 17 additions and 1 deletions
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18
src/codegen/spirv.zig
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@ -586,7 +586,23 @@ pub const DeclGen = struct {
try self.genDeclRef(decl_result_id, decl_index);
try self.variable(.global, result_id, result_ty_ref, decl_result_id);
},
else => return self.todo("constant pointer of value type {s}", .{@tagName(val.tag())}),
.slice => {
const slice = val.castTag(.slice).?.data;
var buf: Type.SlicePtrFieldTypeBuffer = undefined;
const ptr_id = self.spv.allocId();
try self.genConstant(ptr_id, ty.slicePtrFieldType(&buf), slice.ptr, .indirect);
const len_id = self.spv.allocId();
try self.genConstant(len_id, Type.usize, slice.len, .indirect);
const constituents = [_]IdRef{ ptr_id, len_id };
try section.emit(self.spv.gpa, .OpSpecConstantComposite, .{
.id_result_type = result_ty_id,
.id_result = result_id,
.constituents = &constituents,
});
},
else => return self.todo("pointer of value type {s}", .{@tagName(val.tag())}),
},
.Fn => switch (repr) {
.direct => unreachable,