compiletest: add `max-llvm-major-version` directive #132310

jieyouxu · 2024-10-29T06:16:39Z

To complement existing min-llvm-version so contributors don't have to use ignore-llvm-version: 20 - 99 to emulate max-llvm-major-version: 19.

Closes #132305.
cc @workingjubilee who suggested this.

Implementation steps

1. Implement the directive (this PR)
2. Open an accompanying dev-guide PR to describe the directive (Document max-llvm-major-version directive rustc-dev-guide#2129)

r? bootstrap

Zalathar · 2024-10-29T06:26:20Z

Not mandatory, but consider also editing the ~5 tests that currently use the N-99 pattern, so that the new directive is actually used.

Zalathar · 2024-10-29T06:28:53Z

src/tools/compiletest/src/header.rs

-            // Ignore if actual version is smaller the minimum required
-            // version
+        if let Some(value) = config.parse_name_value_directive(line, "min-llvm-version") {
+            let value = value.trim();


Remark: Separate from this PR, we should just make the parse functions trim automatically. I can't imagine a legitimate use-case for directives actually wanting to see untrimmed whitespace.

I didn't want to touch that in the current directive handling, tbh. I prefer we just redo this entirely.

jieyouxu · 2024-10-29T06:32:49Z

Not mandatory, but consider also editing the ~5 tests that currently use the N-99 pattern, so that the new directive is actually used.

Good point, I'll update existing tests.

jieyouxu · 2024-10-30T05:36:25Z

Changes since last force push:

Rebased on top of compiletest: improve robustness of LLVM version handling #132315, this PR needs to wait for that to land first (first commit e419b3d is from compiletest: improve robustness of LLVM version handling #132315).
Renamed directive from max-llvm-version to max-llvm-major-version to more accurately reflect intent (i.e. //@ max-llvm-major-version: 19 will still run the test if llvm version is 19.99.99).
Updated tests that use ignore-llvm-version: $N - $M to use max-llvm-major-version: $(N-1).
Added a FIXME linking to compiletest: allow only running a test if we have a *specific* llvm major version #132348 for tests/codegen/try_question_mark_nop.rs because that wants something more like //@ only-llvm-major-version: 19 instead.

Zalathar · 2024-10-30T05:39:53Z

Not sure if this is a good idea or not, but another possibility would be to reframe the directive as something like llvm-version-less-than.

In practice, I think a lot of the real-world uses of this directive are going to be along the lines of “this doesn't work on LLVM 21”, in which case llvm-version-less-than: 21 might make more sense? Hard to say.

jieyouxu · 2024-10-30T05:47:41Z

Not sure if this is a good idea or not, but another possibility would be to reframe the directive as something like llvm-version-less-than.

In practice, I think a lot of the real-world uses of this directive are going to be along the lines of “this doesn't work on LLVM 21”, in which case llvm-version-less-than: 21 might make more sense? Hard to say.

We could also just use a semver version range: //@ only-llvm-version-range: >=20.0.0. Since we're using semver in the prerequisite PR anyway this can even do stuff like //@ only-llvm-version-range: >=19 <21. Or 19.2 - 20.3.0.

(But that is also quite obscure, just musing)

…nur-ozkan compiletest: improve robustness of LLVM version handling Previously, `extract_llvm_versions` did some gymnastics for llvm versions by combining `(major, minor, patch)` into a combined version integer, but that is not very robust and made it difficult to add `max-llvm-major-version`. This PR tries to: - Improve llvm version handling robustness by parsing and representing the version as a semver. We intentionally deviate from strict semver standards by allowing omission of minor and patch versions. They default to `0` when absent. This is for convenience to allow the user to write e.g. `//@ min-llvm-version: 18` instead of having to spell out the full `major.minor.patch` semver string `//@ min-llvm-verison: 18.0.0`. - Adjust some panic messages to include a bit more context about *why* the version string was rejected. Prerequisite for rust-lang#132310. r? bootstrap (or compiler)

Rollup merge of rust-lang#132315 - jieyouxu:extract-llvm-version, r=onur-ozkan compiletest: improve robustness of LLVM version handling Previously, `extract_llvm_versions` did some gymnastics for llvm versions by combining `(major, minor, patch)` into a combined version integer, but that is not very robust and made it difficult to add `max-llvm-major-version`. This PR tries to: - Improve llvm version handling robustness by parsing and representing the version as a semver. We intentionally deviate from strict semver standards by allowing omission of minor and patch versions. They default to `0` when absent. This is for convenience to allow the user to write e.g. `//@ min-llvm-version: 18` instead of having to spell out the full `major.minor.patch` semver string `//@ min-llvm-verison: 18.0.0`. - Adjust some panic messages to include a bit more context about *why* the version string was rejected. Prerequisite for rust-lang#132310. r? bootstrap (or compiler)

jieyouxu · 2024-11-08T09:10:44Z

Hm, I feel like I forgot to set this as ready, lol.

@rustbot ready

jieyouxu · 2024-11-13T08:24:01Z

r? bootstrap

src/tools/compiletest/src/directive-list.rs

onur-ozkan · 2024-11-13T21:13:22Z

@bors r+

bors · 2024-11-13T21:13:25Z

📌 Commit f41e1cf has been approved by onur-ozkan

It is now in the queue for this repository.

bors · 2024-11-14T05:00:03Z

☔ The latest upstream changes (presumably #133006) made this pull request unmergeable. Please resolve the merge conflicts.

There's already `min-llvm-version`, and contributors were using `ignore-llvm-version: 20 - 99` to emulate `max-llvm-major-version: 19`.

…range like `N - 99` For tests that use `ignore-llvm-version: N - M`, replace that with `max-llvm-major-version: N-1`.

jieyouxu · 2024-11-14T09:47:06Z

Just whitespace conflicts.

@bors r=onur-ozkan

bors · 2024-11-14T09:47:08Z

📌 Commit 91fa16b has been approved by onur-ozkan

It is now in the queue for this repository.

…llaumeGomez Rollup of 5 pull requests Successful merges: - rust-lang#132010 (ci: Enable full `debuginfo-level=2` in `DEPLOY_ALT`) - rust-lang#132310 (compiletest: add `max-llvm-major-version` directive) - rust-lang#132773 (PassWrapper: disable UseOdrIndicator for Asan Win32) - rust-lang#133013 (compiletest: known-bug / crashes: allow for an "auxiliary" directory to contain files that do not have a "known-bug" directive) - rust-lang#133027 (Fix a copy-paste issue in the NuttX raw type definition) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of rust-lang#132310 - jieyouxu:max-llvm-version, r=onur-ozkan compiletest: add `max-llvm-major-version` directive To complement existing `min-llvm-version` so contributors don't have to use `ignore-llvm-version: 20 - 99` to emulate `max-llvm-major-version: 19`. Closes rust-lang#132305. cc `@workingjubilee` who suggested this. ### Implementation steps - [x] 1. Implement the directive (this PR) - [x] 2. Open an accompanying dev-guide PR to describe the directive (rust-lang/rustc-dev-guide#2129) r? bootstrap

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jieyouxu marked this pull request as draft October 29, 2024 06:41

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compiletest: improve robustness of LLVM version handling #132315

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jieyouxu force-pushed the max-llvm-version branch from aae8f1d to b6a7cca Compare October 30, 2024 05:25

jieyouxu changed the title ~~compiletest: add max-llvm-version directive~~ compiletest: add max-llvm-major-version directive Oct 30, 2024

jieyouxu force-pushed the max-llvm-version branch from b6a7cca to f41e1cf Compare November 4, 2024 08:38

jieyouxu marked this pull request as ready for review November 8, 2024 09:10

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This was referenced Nov 8, 2024

Document max-llvm-major-version directive rust-lang/rustc-dev-guide#2129

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tests/ui/abi/sparcv8plus.rs#sparc_cpu_v9 broken in LLVM 20 #132957

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rustbot assigned Mark-Simulacrum and unassigned albertlarsan68 Nov 13, 2024

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bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Nov 13, 2024

bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Nov 14, 2024

jieyouxu added 2 commits November 14, 2024 17:44

compiletest: add max-llvm-major-version directive

7eee9fa

There's already `min-llvm-version`, and contributors were using `ignore-llvm-version: 20 - 99` to emulate `max-llvm-major-version: 19`.

tests: use max-llvm-major-version instead of ignore-llvm-version …

91fa16b

…range like `N - 99` For tests that use `ignore-llvm-version: N - M`, replace that with `max-llvm-major-version: N-1`.

jieyouxu force-pushed the max-llvm-version branch from f41e1cf to 91fa16b Compare November 14, 2024 09:46

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Nov 14, 2024

GuillaumeGomez mentioned this pull request Nov 14, 2024

Rollup of 5 pull requests #133032

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bors merged commit 475203f into rust-lang:master Nov 14, 2024
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compiletest: add `max-llvm-major-version` directive #132310

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