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x64: add naive impl of else in switch

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This commit is contained in:
Jakub Konka 2022-02-22 11:04:58 +01:00
parent 2617117221
commit b9b4e4671f
1 changed files with 14 additions and 11 deletions
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25
src/arch/x86_64/CodeGen.zig
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@ -3953,19 +3953,22 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) !void {
}
if (switch_br.data.else_body_len > 0) {
return self.fail("TODO handle else branch in switch", .{});
const else_body = self.air.extra[extra_index..][0..switch_br.data.else_body_len];
try self.branch_stack.append(.{});
defer self.branch_stack.pop().deinit(self.gpa);
const else_deaths = liveness.deaths.len - 1;
try self.ensureProcessDeathCapacity(liveness.deaths[else_deaths].len);
for (liveness.deaths[else_deaths]) |operand| {
self.processDeath(operand);
}
try self.genBody(else_body);
// TODO consolidate returned MCValues between prongs and else branch like we do
// in airCondBr.
}
// const else_body = self.air.extra[extra_index..][0..switch_br.data.else_body_len];
// const else_branch = self.branch_stack.addOneAssumeCapacity();
// else_branch.* = .{};
// if (else_body.len != 0) {
// try self.genBody(else_body);
// } else {
// }
return self.finishAir(inst, .unreach, .{ pl_op.operand, .none, .none });
}