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stage2: implement slice_len for slices on the stack

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This commit is contained in:
Jakub Konka 2022-01-01 23:49:23 +01:00
parent aeff635863
commit 4590820c4c
1 changed files with 8 additions and 4 deletions
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12
src/arch/x86_64/CodeGen.zig
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@ -1261,10 +1261,14 @@ fn airSlicePtr(self: *Self, inst: Air.Inst.Index) !void {
fn airSliceLen(self: *Self, inst: Air.Inst.Index) !void {
const ty_op = self.air.instructions.items(.data)[inst].ty_op;
const result: MCValue = if (self.liveness.isUnused(inst))
.dead
else
return self.fail("TODO implement slice_len for {}", .{self.target.cpu.arch});
const result: MCValue = if (self.liveness.isUnused(inst)) .dead else result: {
const operand = try self.resolveInst(ty_op.operand);
const dst_mcv: MCValue = switch (operand) {
.stack_offset => |off| MCValue{ .stack_offset = off + 4 },
else => return self.fail("TODO implement slice_len for {}", .{operand}),
};
break :result dst_mcv;
};
return self.finishAir(inst, result, .{ ty_op.operand, .none, .none });
}