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stage2: implement array_init instruction (#9843)

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* stage2: array mul support more types of operands
* stage2: array cat support more types of operands
* print_zir: print array_init
* stage2: implement Sema for array_init
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g-w1 2021-09-30 18:31:27 -04:00 committed by GitHub
parent c82c3585c8
commit 5e7406bdd9
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3 changed files with 114 additions and 50 deletions
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139
src/Sema.zig
View File

@ -6111,35 +6111,36 @@ fn zirArrayCat(sema: *Sema, block: *Scope.Block, inst: Zir.Inst.Index) CompileEr
if (try sema.resolveDefinedValue(block, lhs_src, lhs)) |lhs_val| {
if (try sema.resolveDefinedValue(block, rhs_src, rhs)) |rhs_val| {
const final_len = lhs_info.len + rhs_info.len;
if (lhs_ty.zigTypeTag() == .Pointer) {
var anon_decl = try block.startAnonDecl();
defer anon_decl.deinit();
const is_pointer = lhs_ty.zigTypeTag() == .Pointer;
var anon_decl = try block.startAnonDecl();
defer anon_decl.deinit();
const lhs_sub_val = (try lhs_val.pointerDeref(anon_decl.arena())).?;
const rhs_sub_val = (try rhs_val.pointerDeref(anon_decl.arena())).?;
const buf = try anon_decl.arena().alloc(Value, final_len);
{
var i: u64 = 0;
while (i < lhs_info.len) : (i += 1) {
const val = try lhs_sub_val.elemValue(sema.arena, i);
buf[i] = try val.copy(anon_decl.arena());
}
const lhs_sub_val = if (is_pointer) (try lhs_val.pointerDeref(anon_decl.arena())).? else lhs_val;
const rhs_sub_val = if (is_pointer) (try rhs_val.pointerDeref(anon_decl.arena())).? else rhs_val;
const buf = try anon_decl.arena().alloc(Value, final_len);
{
var i: u64 = 0;
while (i < lhs_info.len) : (i += 1) {
const val = try lhs_sub_val.elemValue(sema.arena, i);
buf[i] = try val.copy(anon_decl.arena());
}
{
var i: u64 = 0;
while (i < rhs_info.len) : (i += 1) {
const val = try rhs_sub_val.elemValue(sema.arena, i);
buf[lhs_info.len + i] = try val.copy(anon_decl.arena());
}
}
const ty = if (res_sent) |rs|
try Type.Tag.array_sentinel.create(anon_decl.arena(), .{ .len = final_len, .elem_type = lhs_info.elem_type, .sentinel = rs })
else
try Type.Tag.array.create(anon_decl.arena(), .{ .len = final_len, .elem_type = lhs_info.elem_type });
const val = try Value.Tag.array.create(anon_decl.arena(), buf);
return sema.analyzeDeclRef(try anon_decl.finish(ty, val));
}
return sema.mod.fail(&block.base, lhs_src, "TODO array_cat more types of Values", .{});
{
var i: u64 = 0;
while (i < rhs_info.len) : (i += 1) {
const val = try rhs_sub_val.elemValue(sema.arena, i);
buf[lhs_info.len + i] = try val.copy(anon_decl.arena());
}
}
const ty = if (res_sent) |rs|
try Type.Tag.array_sentinel.create(anon_decl.arena(), .{ .len = final_len, .elem_type = lhs_info.elem_type, .sentinel = rs })
else
try Type.Tag.array.create(anon_decl.arena(), .{ .len = final_len, .elem_type = lhs_info.elem_type });
const val = try Value.Tag.array.create(anon_decl.arena(), buf);
return if (is_pointer)
sema.analyzeDeclRef(try anon_decl.finish(ty, val))
else
sema.analyzeDeclVal(block, .unneeded, try anon_decl.finish(ty, val));
} else {
return sema.mod.fail(&block.base, lhs_src, "TODO runtime array_cat", .{});
}
@ -6179,29 +6180,30 @@ fn zirArrayMul(sema: *Sema, block: *Scope.Block, inst: Zir.Inst.Index) CompileEr
const final_len = std.math.mul(u64, mulinfo.len, tomulby) catch return sema.mod.fail(&block.base, rhs_src, "operation results in overflow", .{});
if (try sema.resolveDefinedValue(block, lhs_src, lhs)) |lhs_val| {
if (lhs_ty.zigTypeTag() == .Pointer) {
var anon_decl = try block.startAnonDecl();
defer anon_decl.deinit();
const lhs_sub_val = (try lhs_val.pointerDeref(anon_decl.arena())).?;
var anon_decl = try block.startAnonDecl();
defer anon_decl.deinit();
const lhs_sub_val = if (lhs_ty.zigTypeTag() == .Pointer) (try lhs_val.pointerDeref(anon_decl.arena())).? else lhs_val;
const final_ty = if (mulinfo.sentinel) |sent|
try Type.Tag.array_sentinel.create(anon_decl.arena(), .{ .len = final_len, .elem_type = mulinfo.elem_type, .sentinel = sent })
else
try Type.Tag.array.create(anon_decl.arena(), .{ .len = final_len, .elem_type = mulinfo.elem_type });
const buf = try anon_decl.arena().alloc(Value, final_len);
const final_ty = if (mulinfo.sentinel) |sent|
try Type.Tag.array_sentinel.create(anon_decl.arena(), .{ .len = final_len, .elem_type = mulinfo.elem_type, .sentinel = sent })
else
try Type.Tag.array.create(anon_decl.arena(), .{ .len = final_len, .elem_type = mulinfo.elem_type });
const buf = try anon_decl.arena().alloc(Value, final_len);
var i: u64 = 0;
while (i < tomulby) : (i += 1) {
var j: u64 = 0;
while (j < mulinfo.len) : (j += 1) {
const val = try lhs_sub_val.elemValue(sema.arena, j);
buf[mulinfo.len * i + j] = try val.copy(anon_decl.arena());
}
// the actual loop
var i: u64 = 0;
while (i < tomulby) : (i += 1) {
var j: u64 = 0;
while (j < mulinfo.len) : (j += 1) {
const val = try lhs_sub_val.elemValue(sema.arena, j);
buf[mulinfo.len * i + j] = try val.copy(anon_decl.arena());
}
const val = try Value.Tag.array.create(anon_decl.arena(), buf);
return sema.analyzeDeclRef(try anon_decl.finish(final_ty, val));
}
return sema.mod.fail(&block.base, lhs_src, "TODO array_mul more types of Values", .{});
const val = try Value.Tag.array.create(anon_decl.arena(), buf);
if (lhs_ty.zigTypeTag() == .Pointer) {
return sema.analyzeDeclRef(try anon_decl.finish(final_ty, val));
} else {
return sema.analyzeDeclVal(block, .unneeded, try anon_decl.finish(final_ty, val));
}
}
return sema.mod.fail(&block.base, lhs_src, "TODO runtime array_mul", .{});
}
@ -8227,8 +8229,49 @@ fn zirArrayInit(sema: *Sema, block: *Scope.Block, inst: Zir.Inst.Index, is_ref:
const inst_data = sema.code.instructions.items(.data)[inst].pl_node;
const src = inst_data.src();
_ = is_ref;
return sema.mod.fail(&block.base, src, "TODO: Sema.zirArrayInit", .{});
const extra = sema.code.extraData(Zir.Inst.MultiOp, inst_data.payload_index);
const args = sema.code.refSlice(extra.end, extra.data.operands_len);
var resolved_args = try sema.mod.gpa.alloc(Air.Inst.Ref, args.len);
for (args) |arg, i| resolved_args[i] = sema.resolveInst(arg);
var all_args_comptime = for (resolved_args) |arg| {
if ((try sema.resolveMaybeUndefVal(block, src, arg)) == null) break false;
} else true;
if (all_args_comptime) {
var anon_decl = try block.startAnonDecl();
defer anon_decl.deinit();
assert(!(resolved_args.len == 0));
const final_ty = try Type.Tag.array.create(anon_decl.arena(), .{ .len = resolved_args.len, .elem_type = sema.typeOf(resolved_args[0]) });
const buf = try anon_decl.arena().alloc(Value, resolved_args.len);
for (resolved_args) |arg, i| {
buf[i] = (try sema.resolveMaybeUndefVal(block, src, arg)).?;
}
const val = try Value.Tag.array.create(anon_decl.arena(), buf);
if (is_ref)
return sema.analyzeDeclRef(try anon_decl.finish(final_ty, val))
else
return sema.analyzeDeclVal(block, .unneeded, try anon_decl.finish(final_ty, val));
}
assert(!(resolved_args.len == 0));
const array_ty = try Type.Tag.array.create(sema.arena, .{ .len = resolved_args.len, .elem_type = sema.typeOf(resolved_args[0]) });
const final_ty = try Type.ptr(sema.arena, .{
.pointee_type = array_ty,
.@"addrspace" = target_util.defaultAddressSpace(sema.mod.getTarget(), .local),
});
const alloc = try block.addTy(.alloc, final_ty);
for (resolved_args) |arg, i| {
const pointer_to_array_at_index = try block.addBinOp(.ptr_elem_ptr, alloc, try sema.addIntUnsigned(Type.initTag(.u64), i));
_ = try block.addBinOp(.store, pointer_to_array_at_index, arg);
}
return if (is_ref)
alloc
else
try sema.analyzeLoad(block, .unneeded, alloc, .unneeded);
}
fn zirArrayInitAnon(sema: *Sema, block: *Scope.Block, inst: Zir.Inst.Index, is_ref: bool) CompileError!Air.Inst.Ref {

19
src/print_zir.zig
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@ -259,15 +259,16 @@ const Writer = struct {
.@"break",
.break_inline,
=> try self.writeBreak(stream, inst),
.array_init,
.array_init_ref,
=> try self.writeArrayInit(stream, inst),
.elem_ptr_node,
.elem_val_node,
.slice_start,
.slice_end,
.slice_sentinel,
.array_init,
.array_init_anon,
.array_init_ref,
.array_init_anon_ref,
.union_init_ptr,
.shuffle,
@ -1860,6 +1861,20 @@ const Writer = struct {
try stream.writeAll(")");
}
fn writeArrayInit(self: *Writer, stream: anytype, inst: Zir.Inst.Index) !void {
const inst_data = self.code.instructions.items(.data)[inst].pl_node;
const extra = self.code.extraData(Zir.Inst.MultiOp, inst_data.payload_index);
const args = self.code.refSlice(extra.end, extra.data.operands_len);
try stream.writeAll(".{");
for (args) |arg, i| {
if (i != 0) try stream.writeAll(", ");
try self.writeInstRef(stream, arg);
}
try stream.writeAll("})");
}
fn writeUnreachable(self: *Writer, stream: anytype, inst: Zir.Inst.Index) !void {
const inst_data = self.code.instructions.items(.data)[inst].@"unreachable";
const safety_str = if (inst_data.safety) "safe" else "unsafe";

6
test/behavior/array.zig
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@ -27,3 +27,9 @@ test "arrays" {
fn getArrayLen(a: []const u32) usize {
return a.len;
}
test "array init with mult" {
const a = 'a';
var i: [8]u8 = [2]u8{ a, 'b' } ** 4;
try expect(std.mem.eql(u8, &i, "abababab"));
}