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x64: implement aggregate_init for structs

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This commit is contained in:
Jakub Konka 2022-03-24 14:41:13 +01:00
parent 2286f9bd1f
commit 4e801c2783
1 changed files with 21 additions and 3 deletions
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24
src/arch/x86_64/CodeGen.zig
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@ -5671,13 +5671,31 @@ fn airReduce(self: *Self, inst: Air.Inst.Index) !void {
}
fn airAggregateInit(self: *Self, inst: Air.Inst.Index) !void {
const vector_ty = self.air.typeOfIndex(inst);
const len = vector_ty.vectorLen();
const result_ty = self.air.typeOfIndex(inst);
const len = result_ty.vectorLen();
const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
const elements = @bitCast([]const Air.Inst.Ref, self.air.extra[ty_pl.payload..][0..len]);
const abi_size = @intCast(u32, result_ty.abiSize(self.target.*));
const abi_align = result_ty.abiAlignment(self.target.*);
const result: MCValue = res: {
if (self.liveness.isUnused(inst)) break :res MCValue.dead;
return self.fail("TODO implement airAggregateInit for x86_64", .{});
switch (result_ty.zigTypeTag()) {
.Struct => {
const stack_offset = @intCast(i32, try self.allocMem(inst, abi_size, abi_align));
for (elements) |elem, elem_i| {
if (result_ty.structFieldValueComptime(elem_i) != null) continue; // comptime elem
const elem_ty = result_ty.structFieldType(elem_i);
const elem_off = result_ty.structFieldOffset(elem_i, self.target.*);
const elem_mcv = try self.resolveInst(elem);
try self.genSetStack(elem_ty, stack_offset - @intCast(i32, elem_off), elem_mcv, .{});
}
break :res MCValue{ .stack_offset = stack_offset };
},
.Array => return self.fail("TODO implement aggregate_init for arrays", .{}),
.Vector => return self.fail("TODO implement aggregate_init for vectors", .{}),
else => unreachable,
}
};
if (elements.len <= Liveness.bpi - 1) {