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compiler-builtins CI fails on powerpc64 #99853

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Amanieu opened this issue Jul 28, 2022 · 2 comments
Open

compiler-builtins CI fails on powerpc64 #99853

Amanieu opened this issue Jul 28, 2022 · 2 comments
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C-bug Category: This is a bug. O-PowerPC Target: PowerPC processors regression-untriaged Untriaged performance or correctness regression. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@Amanieu
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Amanieu commented Jul 28, 2022

Some memset tests fail on both powerpc64-unknown-linux-gnu and powerpc64le-unknown-linux-gnu, but only with --release. Bisecting show #91743 as the culprit, but I think it just exposes an existing LLVM bug rather than being the root cause.

powerpc64le

---- memset_backward_aligned stdout ----
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 204, 204, 204, 204, 204, 204, 204, 204, 204, 0, 0, 0, 0, 204, 204, 204, 204, 28, 29, 30, 31]`,
 right: `[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 28, 29, 30, 31]`', testcrate/tests/mem.rs:265:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- memset_backward_misaligned_aligned_start stdout ----
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `[0, 1, 2, 3, 4, 5, 6, 7, 204, 204, 204, 204, 0, 0, 0, 0, 204, 204, 204, 204, 0, 0, 0, 0, 204, 25, 26, 27, 28, 29, 30, 31]`,
 right: `[0, 1, 2, 3, 4, 5, 6, 7, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 25, 26, 27, 28, 29, 30, 31]`', testcrate/tests/mem.rs:253:9

---- memset_backward_misaligned_nonaligned_start stdout ----
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `[0, 1, 2, 3, 4, 5, 204, 204, 204, 204, 204, 204, 0, 0, 0, 0, 204, 204, 204, 204, 204, 204, 204, 23, 24, 25, 26, 27, 28, 29, 30, 31]`,
 right: `[0, 1, 2, 3, 4, 5, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 23, 24, 25, 26, 27, 28, 29, 30, 31]`', testcrate/tests/mem.rs:241:9

powerpc64

---- memset_backward_aligned stdout ----
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 204, 204, 204, 204, 204, 0, 0, 0, 0, 204, 204, 204, 204, 204, 204, 204, 204, 28, 29, 30, 31]`,
 right: `[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 28, 29, 30, 31]`', testcrate/tests/mem.rs:265:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- memset_backward_misaligned_aligned_start stdout ----
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `[0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 204, 204, 204, 204, 0, 0, 0, 0, 204, 204, 204, 204, 204, 25, 26, 27, 28, 29, 30, 31]`,
 right: `[0, 1, 2, 3, 4, 5, 6, 7, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 25, 26, 27, 28, 29, 30, 31]`', testcrate/tests/mem.rs:253:9

---- memset_backward_misaligned_nonaligned_start stdout ----
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `[0, 1, 2, 3, 4, 5, 204, 204, 0, 0, 0, 0, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 23, 24, 25, 26, 27, 28, 29, 30, 31]`,
 right: `[0, 1, 2, 3, 4, 5, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 204, 23, 24, 25, 26, 27, 28, 29, 30, 31]`', testcrate/tests/mem.rs:241:9
@Amanieu Amanieu added C-bug Category: This is a bug. regression-untriaged Untriaged performance or correctness regression. labels Jul 28, 2022
@rustbot rustbot added the I-prioritize Issue: Indicates that prioritization has been requested for this issue. label Jul 28, 2022
@Amanieu
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Amanieu commented Jul 28, 2022

#88520 might be related: we previously had some test failures due to the LLVM 13 upgrade, which we never got around to fixing (we just disable those tests on PPC64).

Amanieu added a commit to Amanieu/rustc-builtins that referenced this issue Jul 28, 2022
@Amanieu
Disable some PPC64 tests which are failing due to an LLVM(?) bug
265fdac 
See rust-lang/rust#99853
@Amanieu Amanieu mentioned this issue Jul 28, 2022
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@apiraino apiraino added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. I-compiler-nominated Nominated for discussion during a compiler team meeting. labels Aug 3, 2022
@pnkfelix pnkfelix mentioned this issue Aug 4, 2022
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@apiraino apiraino removed the I-compiler-nominated Nominated for discussion during a compiler team meeting. label Aug 9, 2022
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apiraino commented Sep 1, 2022

removing I-prioritize since this topic will be handled in a T-compiler meeting

@rustbot label -I-prioritize

@rustbot rustbot removed the I-prioritize Issue: Indicates that prioritization has been requested for this issue. label Sep 1, 2022
@Enselic Enselic added the O-PowerPC Target: PowerPC processors label Apr 2, 2024
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