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AstGen: implement integers bigger than u64

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also get rid of the `optional_type_from_ptr_elem` instruction.
This commit is contained in:
Andrew Kelley
2021-04-22 23:47:31 -07:00
parent 2d290d6f82
commit 715abe8ebe
4 changed files with 95 additions and 66 deletions
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36
src/Module.zig
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@@ -1423,6 +1423,26 @@ pub const Scope = struct {
});
}
pub fn addIntBig(gz: *GenZir, limbs: []const std.math.big.Limb) !Zir.Inst.Ref {
const astgen = gz.astgen;
const gpa = astgen.gpa;
try gz.instructions.ensureUnusedCapacity(gpa, 1);
try astgen.instructions.ensureUnusedCapacity(gpa, 1);
try astgen.string_bytes.ensureUnusedCapacity(gpa, @sizeOf(std.math.big.Limb) * limbs.len);
const new_index = @intCast(Zir.Inst.Index, astgen.instructions.len);
astgen.instructions.appendAssumeCapacity(.{
.tag = .int_big,
.data = .{ .str = .{
.start = @intCast(u32, astgen.string_bytes.items.len),
.len = @intCast(u32, limbs.len),
} },
});
gz.instructions.appendAssumeCapacity(new_index);
astgen.string_bytes.appendSliceAssumeCapacity(mem.sliceAsBytes(limbs));
return gz.indexToRef(new_index);
}
pub fn addFloat(gz: *GenZir, number: f32, src_node: ast.Node.Index) !Zir.Inst.Ref {
return gz.add(.{
.tag = .float,
@@ -1683,22 +1703,6 @@ pub const Scope = struct {
return gz.indexToRef(new_index);
}
/// Asserts that `str` is 8 or fewer bytes.
pub fn addSmallStr(
gz: *GenZir,
tag: Zir.Inst.Tag,
str: []const u8,
) !Zir.Inst.Ref {
var buf: [9]u8 = undefined;
mem.copy(u8, &buf, str);
buf[str.len] = 0;
return gz.add(.{
.tag = tag,
.data = .{ .small_str = .{ .bytes = buf[0..8].* } },
});
}
/// Note that this returns a `Zir.Inst.Index` not a ref.
/// Does *not* append the block instruction to the scope.
/// Leaves the `payload_index` field undefined.