Add / adapt upstream fixes

[saghul]

No description provided.

[bnoordhuis]

I think we don't need -fwrapv, the ubsan buildbot should catch (and, in the past, has caught) instances of signed integer overflow.

[saghul]

I think we don't need -fwrapv, the ubsan buildbot should catch (and, in the past, has caught) instances of signed integer overflow.

Does it hurt to have it? I don't mind dropping that commit.

[saghul]

@bnoordhuis Added one last commit, PTAL.

Note I omitted this part bellard/quickjs@4bb8c35#diff-45f1ae674139f993bf8a99c382c1ba4863272a6fec2f492d76d7ff1b2cfcfbe2R31978 since we defined DUMP_BYTECODE 64 ourselves. Shall I rename our addition to 128 and keep the upstream one as 64?

[bnoordhuis]

Does it hurt to have it?

It can. It inhibits some compiler optimizations around loops.

Shall I rename our addition to 128 and keep the upstream one as 64?

Sure, seems fine to me.

[saghul]

Does it hurt to have it?

It can. It inhibits some compiler optimizations around loops.

Shall I rename our addition to 128 and keep the upstream one as 64?

Sure, seems fine to me.

Ack, fixed both!