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x64: implement airSlice

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This commit is contained in:
Jakub Konka 2022-02-16 14:05:48 +01:00
parent 78e6f9c44c
commit 3383064b27
1 changed files with 15 additions and 4 deletions
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19
src/arch/x86_64/CodeGen.zig
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@ -1071,10 +1071,21 @@ fn airMax(self: *Self, inst: Air.Inst.Index) !void {
fn airSlice(self: *Self, inst: Air.Inst.Index) !void {
const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
const bin_op = self.air.extraData(Air.Bin, ty_pl.payload).data;
const result: MCValue = if (self.liveness.isUnused(inst))
.dead
else
return self.fail("TODO implement slice for {}", .{self.target.cpu.arch});
if (self.liveness.isUnused(inst)) {
return self.finishAir(inst, .dead, .{ bin_op.lhs, bin_op.rhs, .none });
}
const ptr = try self.resolveInst(bin_op.lhs);
const ptr_ty = self.air.typeOf(bin_op.lhs);
const len = try self.resolveInst(bin_op.rhs);
const len_ty = self.air.typeOf(bin_op.rhs);
const stack_offset = @intCast(i32, try self.allocMem(inst, 16, 16));
try self.genSetStack(ptr_ty, stack_offset + 8, ptr);
try self.genSetStack(len_ty, stack_offset, len);
const result = MCValue{ .stack_offset = stack_offset };
return self.finishAir(inst, result, .{ bin_op.lhs, bin_op.rhs, .none });
}