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Test x86_64-gnu in PR CI, not x86_64-gnu-llvm-14 #112296

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@jyn514 jyn514 commented Jun 5, 2023

This is a pre-requisite for #112143, which wants to start using download-rustc in PRs. download-rustc doesn't allow providing an external LLVM.

r? @ghost

@rustbot rustbot added A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. labels Jun 5, 2023
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When I changed codegen tests, CI running old LLVM was useful because it immediately made me aware that I forgot to make them old LLVM compatible (typed pointers 😿). But that problem should get a lot smaller once we finally drop support for typed pointer LLVM.
But I also clearly see the benefit for using download-rustc, so it's probably worth it. cc @nikic anyways if you have opinions

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nikic commented Jun 5, 2023

@Nilstrieb I think that's okay, because the issue goes both ways. If we're testing llvm-14, we don't see codegen test failures for the current LLVM version in PRs, so one of the configurations will not be covered either way, and I'm not sure the llvm-14 configuration is inherently more valuable from that perspective. Fixing llvm-N failures is usually just a matter of slapping min-llvm-version on the test, so doesn't require much trial and error.

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Well, I assume that src/llvm-project LLVM will be tested locally, so both configurations are tested. But yeah, not a big concern.

jyn514 added 2 commits June 6, 2023 18:00
This is a pre-requisite for rust-lang#112143, which wants to start
using download-rustc in PRs. download-rustc doesn't allow providing an external LLVM.
this was a pre-existing latent bug, we just didn't have any CI builders exercising it.

fixes the following errors:
```
 ---- [ui] tests/ui/sanitize/new-llvm-pass-manager-thin-lto.rs#opt1 stdout ----

error in revision `opt1`: test compilation failed although it shouldn't!
status: exit status: 1
command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/sanitize/new-llvm-pass-manager-thin-lto.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=i686-unknown-linux-gnu" "--cfg" "opt1" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Cstrip=debuginfo" "--remap-path-prefix=/checkout/tests/ui=fake-test-src-base" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/sanitize/new-llvm-pass-manager-thin-lto.opt1/a" "-A" "unused" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/i686-unknown-linux-gnu/native/rust-test-helpers" "-Clinker=x86_64-linux-gnu-gcc" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/sanitize/new-llvm-pass-manager-thin-lto.opt1/auxiliary" "-Zsanitizer=address" "-Clto=thin" "-Copt-level=1"
--- stderr -------------------------------
error: linking with `x86_64-linux-gnu-gcc` failed: exit status: 1
   = note: x86_64-linux-gnu-gcc: error: /checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/i686-unknown-linux-gnu/lib/librustc-nightly_rt.asan.a: No such file or directory

failures:
    [ui] tests/ui/sanitize/badfree.rs
    [ui] tests/ui/sanitize/address.rs
    [ui] tests/ui/sanitize/use-after-scope.rs
    [ui] tests/ui/sanitize/new-llvm-pass-manager-thin-lto.rs#opt0
    [ui] tests/ui/sanitize/new-llvm-pass-manager-thin-lto.rs#opt1
```
@jyn514 jyn514 added S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 7, 2023
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jyn514 commented Jun 12, 2023

closing in favor of #112143

@jyn514 jyn514 closed this Jun 12, 2023
@jyn514 jyn514 deleted the no-llvm-14-prs branch June 12, 2023 16:04
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