Allow runtime switching between trans backends by bjorn3 · Pull Request #45684 · rust-lang/rust

bjorn3 · 2017-11-01T13:31:24Z

The driver callback after_llvm has been removed as it doesnt work with multiple backends.

eddyb · 2017-11-01T13:43:25Z

cc @alexcrichton @rust-lang/compiler I'm not sure a flag is the right thing to use here.
Long-term, do we expect/want to have -C backend=cranelift/llvm/etc. or different drivers?

bjorn3 · 2017-11-01T14:00:37Z

Most of the driver is the same for each backend. We could pass different compiler callbacks to rustc_driver for each backend.

alexcrichton · 2017-11-01T15:21:13Z

This seems to add -Z trans but never uses it? How can this be implemented unless we use trait objects?

bjorn3 · 2017-11-01T15:41:49Z

-Z trans is used at https://github.com/bjorn3/rust/blob/67f54e64464ae444de565cc48dc83c7abe6fd55e/src/librustc_driver/lib.rs#L244

eddyb · 2017-11-01T21:13:30Z

@bjorn3 We use "custom drivers" to refer to different binaries using rustc_driver, not replacements for rustc_driver.

bjorn3 · 2017-11-02T18:45:49Z

Now with less object unsafe associated types 🎊

carols10cents · 2017-11-06T14:14:13Z

What's the status of this PR @bjorn3 @alexcrichton @eddyb? I'm having a tough time telling :)

eddyb · 2017-11-06T14:16:20Z

I'm not sure what we should do here. Nominating for discussion in the next compiler meeting.

bjorn3 · 2017-11-07T18:05:15Z

Now with less object unsafe associated types 🎊
Edit: now completely object safe

eddyb · 2017-11-09T22:05:44Z

@bjorn3 Out of curiosity, do you have some specific motivation/need behind this PR, or is it intended as a general refactoring towards supporting multiple backends?

bjorn3 · 2017-11-10T07:11:29Z

Mainly refactoring, but when this is merged I want to try to add basic cranelift support.

eddyb · 2017-11-10T08:19:57Z

I'd suggest more coordination between you, @sunfishcode and me, and the compiler team in general. Just to avoid stepping on eachother's toes, as we are all interested in this goal :).

eddyb · 2017-11-12T05:22:55Z

r? @nikomatsakis

bjorn3 · 2017-11-12T09:35:32Z

Removed as it requires the now removed after_llvm callback.

nikomatsakis

So, eddyb kicked this to me, but I actually don't know that I'm the right person to do a detailed review here. I mean I could, but I think that @eddyb and perhaps @michaelwoerister have stronger opinions about how this should be internally architected. @bjorn3 can you and @eddyb sync up at some point and talk it over?

nikomatsakis · 2017-11-13T17:17:42Z

This seems like an important thing to get right before we land, no? Although I guess it's only a warning, not an error, but I wouldn't want to silently be accepting bad things.

bors · 2017-11-15T10:34:45Z

☔ The latest upstream changes (presumably #45944) made this pull request unmergeable. Please resolve the merge conflicts.

eddyb · 2017-11-15T15:02:52Z

You shouldn't need to do anything here, this is redundant.

You mean i should remove this line?

nikomatsakis · 2017-11-15T16:58:00Z

r? @eddyb -- I'm kicking this back to @eddyb =)

bors · 2018-01-19T22:38:08Z

💔 Test failed - status-travis

arielb1 · 2018-01-19T22:54:42Z

[01:09:03] error: internal compiler error: librustc/ty/maps/mod.rs:81: tcx.maps.target_features_enabled(DefId(0/0:1 ~ some_crate[317d]::{{?}}[0])) unsupported by its crate
[01:09:03] [01:09:03] note: the compiler unexpectedly panicked. this is a bug.
[01:09:03] [01:09:03] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
[01:09:03] [01:09:03] note: rustc 1.25.0-dev running on x86_64-unknown-linux-gnu
[01:09:03] [01:09:03] thread 'rustc' panicked at 'Box<Any>', librustc_errors/lib.rs:509:9
[01:09:03] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[01:09:03] [01:09:03] make[1]: *** [all] Error 101
[01:09:03] [01:09:03] ------------------------------------------
[01:09:03] [01:09:03] thread '[run-make] run-make/hotplug_codegen_backend' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:2884:9
[01:09:03] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[01:09:03] [01:09:03] [01:09:03] failures:
[01:09:03] [run-make] run-make/hotplug_codegen_backend
[01:09:03]

bjorn3 · 2018-01-20T10:56:16Z

Fixed ICE

eddyb · 2018-01-20T10:57:16Z

@bors r+

bors · 2018-01-20T10:57:17Z

📌 Commit a4854e8 has been approved by eddyb

bors · 2018-01-20T11:02:02Z

⌛ Testing commit a4854e8 with merge 9aa40b0...

@eddyb

Allow runtime switching between trans backends The driver callback after_llvm has been removed as it doesnt work with multiple backends. r? @eddyb

bors · 2018-01-20T12:28:10Z

💔 Test failed - status-travis

eddyb · 2018-01-20T16:30:57Z

@bors r+

bors · 2018-01-20T16:30:57Z

📌 Commit a30232f has been approved by eddyb

bors · 2018-01-20T17:52:01Z

⌛ Testing commit a30232f with merge 3153d4a27cf582356da0bb5a2190c7bebd150372...

bors · 2018-01-20T20:52:28Z

💔 Test failed - status-travis

shepmaster · 2018-01-21T01:30:59Z

The job exceeded the maximum time limit for jobs, and has been terminated.

@bors retry

bors · 2018-01-21T09:17:32Z

⌛ Testing commit a30232f with merge 9368a1e...

@eddyb

Allow runtime switching between trans backends The driver callback after_llvm has been removed as it doesnt work with multiple backends. r? @eddyb

bors · 2018-01-21T12:05:44Z

☀️ Test successful - status-appveyor, status-travis
Approved by: eddyb
Pushing 9368a1e to master...

@nrc

Tested on commit rust-lang/rust@9368a1e. 💔 rls on windows: test-pass → build-fail (cc @nrc). 💔 rls on linux: test-pass → build-fail (cc @nrc).

rust-highfive assigned eddyb Nov 1, 2017

bjorn3 mentioned this pull request Nov 1, 2017
[driver breaking] Rename rustc_trans to rustc_codegen_llvm and allow runtime switching between trans backends #45677
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kennytm added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Nov 1, 2017

bjorn3 commented Nov 2, 2017
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Comment threadsrc/librustc_trans_utils/trans_crate.rs Outdated
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Now with less object unsafe associated types 🎊

eddyb added the I-nominated label Nov 6, 2017

bjorn3 commented Nov 7, 2017
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bjorn3 force-pushed the runtime_choose_trans2 branch from eae208e to fd38507Compare November 11, 2017 16:51

rust-highfive assigned nikomatsakis and unassigned eddyb Nov 12, 2017

bjorn3 commented Nov 12, 2017
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Comment threadsrc/test/run-make/llvm-phase/test.rs Outdated
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Removed as it requires the now removed after_llvm callback.

nikomatsakis reviewed Nov 14, 2017
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bjorn3 force-pushed the runtime_choose_trans2 branch from 831a965 to b3a986aCompare November 15, 2017 14:30

eddyb reviewed Nov 15, 2017
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rust-highfive assigned eddyb and unassigned nikomatsakis Nov 15, 2017

nikomatsakis removed the I-nominated label Nov 16, 2017

Fix ICE
a4854e8

bors added a commit that referenced this pull request Jan 20, 2018
Auto merge of#45684- bjorn3:runtime_choose_trans2, r=eddyb
9aa40b0
Allow runtime switching between trans backends The driver callback after_llvm has been removed as it doesnt work with multiple backends. r? @eddyb

Remove the 'extern "C"' in the right place
a30232f

bjorn3 force-pushed the runtime_choose_trans2 branch from fb976fb to a30232fCompare January 20, 2018 16:27

bors added a commit that referenced this pull request Jan 21, 2018
Auto merge of#45684- bjorn3:runtime_choose_trans2, r=eddyb
9368a1e
Allow runtime switching between trans backends The driver callback after_llvm has been removed as it doesnt work with multiple backends. r? @eddyb

bors merged commit a30232f into rust-lang:masterJan 21, 2018

This was referenced Jan 21, 2018
rustc: Lower link args to @-files on Windows more #47507
Merged
rustc: Add -C lto=val option #47521
Merged
Implement RFC 1946 - intra-rustdoc links #47046
Merged
WIP: Parallelize passes using rayon #46564
Closed

topecongiro mentioned this pull request Jan 22, 2018
Rustup to rustc 1.25.0-nightly (97520ccb1 2018-01-21) rust-dev-tools/rls-rustc#5
Merged

alexcrichton mentioned this pull request Jan 23, 2018
rustc: Load the rustc_trans crate at runtime #47671
Merged

XAMPPRocky mentioned this pull request Oct 14, 2020
Tracking Issue for -Z codegen-backend #77933
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