From 4590820c4cd8c2e3fc2da2cf0e3fda632b8f17eb Mon Sep 17 00:00:00 2001 From: Jakub Konka Date: Sat, 1 Jan 2022 23:49:23 +0100 Subject: [PATCH] stage2: implement slice_len for slices on the stack --- src/arch/x86_64/CodeGen.zig | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/src/arch/x86_64/CodeGen.zig b/src/arch/x86_64/CodeGen.zig index 059f4b31f9..769e0401dc 100644 --- a/src/arch/x86_64/CodeGen.zig +++ b/src/arch/x86_64/CodeGen.zig @@ -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 }); }