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stage2: implement @sizeOf

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This commit is contained in:
Andrew Kelley
2021-04-12 21:01:07 -07:00
parent 0e50a0c1e5
commit 69645e2817
3 changed files with 22 additions and 1 deletions
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8
src/AstGen.zig
View File

@@ -1359,6 +1359,7 @@ fn blockExprStmts(
.int_to_enum,
.enum_to_int,
.type_info,
.size_of,
=> break :b false,
// ZIR instructions that are always either `noreturn` or `void`.
@@ -4342,6 +4343,12 @@ fn builtinCall(
return rvalue(gz, scope, rl, result, node);
},
.size_of => {
const operand = try typeExpr(gz, scope, params[0]);
const result = try gz.addUnNode(.size_of, operand, node);
return rvalue(gz, scope, rl, result, node);
},
.add_with_overflow,
.align_cast,
.align_of,
@@ -4396,7 +4403,6 @@ fn builtinCall(
.shl_with_overflow,
.shr_exact,
.shuffle,
.size_of,
.splat,
.reduce,
.src,

11
src/Sema.zig
View File

@@ -264,6 +264,7 @@ pub fn analyzeBody(
.switch_capture_else => try sema.zirSwitchCaptureElse(block, inst, false),
.switch_capture_else_ref => try sema.zirSwitchCaptureElse(block, inst, true),
.type_info => try sema.zirTypeInfo(block, inst),
.size_of => try sema.zirSizeOf(block, inst),
.typeof => try sema.zirTypeof(block, inst),
.typeof_elem => try sema.zirTypeofElem(block, inst),
.typeof_peer => try sema.zirTypeofPeer(block, inst),
@@ -4347,6 +4348,16 @@ fn zirCmp(
return block.addBinOp(src, bool_type, tag, casted_lhs, casted_rhs);
}
fn zirSizeOf(sema: *Sema, block: *Scope.Block, inst: zir.Inst.Index) InnerError!*Inst {
const inst_data = sema.code.instructions.items(.data)[inst].un_node;
const src = inst_data.src();
const operand_src: LazySrcLoc = .{ .node_offset_builtin_call_arg0 = inst_data.src_node };
const operand_ty = try sema.resolveType(block, operand_src, inst_data.operand);
const target = sema.mod.getTarget();
const abi_size = operand_ty.abiSize(target);
return sema.mod.constIntUnsigned(sema.arena, src, Type.initTag(.comptime_int), abi_size);
}
fn zirTypeInfo(sema: *Sema, block: *Scope.Block, inst: zir.Inst.Index) InnerError!*Inst {
const inst_data = sema.code.instructions.items(.data)[inst].un_node;
const src = inst_data.src();

4
src/zir.zig
View File

@@ -695,6 +695,8 @@ pub const Inst = struct {
enum_to_int,
/// Implements the `@typeInfo` builtin. Uses `un_node`.
type_info,
/// Implements the `@sizeOf` builtin. Uses `un_node`.
size_of,
/// Returns whether the instruction is one of the control flow "noreturn" types.
/// Function calls do not count.
@@ -861,6 +863,7 @@ pub const Inst = struct {
.int_to_enum,
.enum_to_int,
.type_info,
.size_of,
=> false,
.@"break",
@@ -1670,6 +1673,7 @@ const Writer = struct {
.struct_init_empty,
.enum_to_int,
.type_info,
.size_of,
=> try self.writeUnNode(stream, inst),
.ref,