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spirv: air array_to_slice

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This commit is contained in:
Robin Voetter 2023-09-17 23:18:06 +02:00 committed by Andrew Kelley
parent 66b1f6c163
commit 8d49b2ef4e
2 changed files with 26 additions and 7 deletions
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26
src/codegen/spirv.zig
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@ -1681,6 +1681,8 @@ pub const DeclGen = struct {
.int_from_float => try self.airIntFromFloat(inst),
.not => try self.airNot(inst),
.array_to_slice => try self.airArrayToSlice(inst),
.slice_ptr => try self.airSliceField(inst, 0),
.slice_len => try self.airSliceField(inst, 1),
.slice_elem_ptr => try self.airSliceElemPtr(inst),
@ -2427,6 +2429,30 @@ pub const DeclGen = struct {
return result_id;
}
fn airArrayToSlice(self: *DeclGen, inst: Air.Inst.Index) !?IdRef {
const mod = self.module;
const ty_op = self.air.instructions.items(.data)[inst].ty_op;
const array_ptr_ty = self.typeOf(ty_op.operand);
const array_ty = array_ptr_ty.childType(mod);
const elem_ty = array_ptr_ty.elemType2(mod); // use elemType() so that we get T for *[N]T.
const elem_ty_ref = try self.resolveType(elem_ty, .indirect);
const elem_ptr_ty_ref = try self.spv.ptrType(elem_ty_ref, spvStorageClass(array_ptr_ty.ptrAddressSpace(mod)));
const slice_ty = self.typeOfIndex(inst);
const slice_ty_ref = try self.resolveType(slice_ty, .direct);
const size_ty_ref = try self.sizeType();
const array_ptr_id = try self.resolve(ty_op.operand);
const len_id = try self.constInt(size_ty_ref, array_ty.arrayLen(mod));
if (!array_ty.hasRuntimeBitsIgnoreComptime(mod)) {
unreachable; // TODO
}
// Convert the pointer-to-array to a pointer to the first element.
const elem_ptr_id = try self.accessChain(elem_ptr_ty_ref, array_ptr_id, &.{0});
return try self.constructStruct(slice_ty_ref, &.{ elem_ptr_id, len_id });
}
fn airSliceField(self: *DeclGen, inst: Air.Inst.Index, field: u32) !?IdRef {
if (self.liveness.isUnused(inst)) return null;
const ty_op = self.air.instructions.items(.data)[inst].ty_op;

7
test/behavior/slice.zig
View File

@ -29,7 +29,6 @@ comptime {
test "slicing" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
var array: [20]i32 = undefined;
@ -346,7 +345,6 @@ test "empty array to slice" {
test "@ptrCast slice to pointer" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn doTheTest() !void {
@ -572,7 +570,6 @@ test "slice syntax resulting in pointer-to-array" {
test "slice pointer-to-array null terminated" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
comptime {
var array = [5:0]u8{ 1, 2, 3, 4, 5 };
@ -714,7 +711,6 @@ test "slice sentinel access at comptime" {
test "slicing array with sentinel as end index" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn do() !void {
@ -733,7 +729,6 @@ test "slicing array with sentinel as end index" {
test "slicing slice with sentinel as end index" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn do() !void {
@ -762,7 +757,6 @@ test "slice len modification at comptime" {
}
test "slice field ptr const" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const const_slice: []const u8 = "string";
@ -777,7 +771,6 @@ test "slice field ptr const" {
test "slice field ptr var" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
var var_slice: []const u8 = "string";