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Improve assembly test for CMSE ABIs #130752

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merged 1 commit into from
Sep 25, 2024
Merged

Improve assembly test for CMSE ABIs #130752

merged 1 commit into from
Sep 25, 2024

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@tdittr tdittr commented Sep 23, 2024

Tracking issues: #75835 #81391

This ensures the code-gen for these ABIs does not change silently. There is a small chance that this code-gen might change, however even GCC (https://godbolt.org/z/16arxab5x and https://godbolt.org/z/16arxab5x) generates almost the same assembly for these ABIs. I hope the notes in the comments should help fix the tests if it ever breaks.

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r? @Mark-Simulacrum

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@rustbot rustbot added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Sep 23, 2024
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Thanks for the PR. I have some suggestions, and requests to make this test less sensitive to benign codegen changes.

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@jieyouxu jieyouxu assigned jieyouxu and unassigned Mark-Simulacrum Sep 23, 2024
@jieyouxu jieyouxu added A-testsuite Area: The testsuite used to check the correctness of rustc T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. F-cmse_nonsecure_entry `#![feature(cmse_nonsecure_entry)]` F-abi_c_cmse_nonsecure_call `#![feature(abi_c_cmse_nonsecure_call)]` A-ABI Area: Concerning the application binary interface (ABI) labels Sep 23, 2024
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@rustbot rustbot 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-review Status: Awaiting review from the assignee but also interested parties. labels Sep 23, 2024
@tdittr @folkertdev
Improve assembly test for CMSE ABIs
3d168c2 
This ensures the code-gen for these ABIs does not change silently.

Co-authored-by: Folkert <folkert@folkertdev.nl>
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tdittr commented Sep 23, 2024

Thanks for the quick response on this one :)

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jieyouxu commented Sep 23, 2024 •
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The other labels and reg matches look more robust to me 👍

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Since we established that we don't need to check precisely how the registers are cleared (considering llvm sometimes does things like use a register or function pointer address to zero another register instead of using an immediate zero), this LGTM

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Thanks!
@bors r+ rollup

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bors commented Sep 24, 2024

📌 Commit 3d168c2 has been approved by jieyouxu

It is now in the queue for this repository.

@bors 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 Sep 24, 2024
@tgross35 tgross35 mentioned this pull request Sep 24, 2024
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bors added a commit to rust-lang-ci/rust that referenced this pull request Sep 25, 2024
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Auto merge of rust-lang#130807 - tgross35:rollup-p304vzf, r=tgross35
1b5aa96 
Rollup of 7 pull requests

Successful merges:

 - rust-lang#130234 (improve compile errors for invalid ptr-to-ptr casts with trait objects)
 - rust-lang#130752 (Improve assembly test for CMSE ABIs)
 - rust-lang#130764 (Separate collection of crate-local inherent impls from error tracking)
 - rust-lang#130788 (Pin memchr to 2.5.0 in the library rather than rustc_ast)
 - rust-lang#130789 (add InProgress ErrorKind gated behind io_error_inprogress feature)
 - rust-lang#130793 (Mention `COMPILETEST_VERBOSE_CRASHES` on crash test failure)
 - rust-lang#130798 (rustdoc: inherit parent's stability where applicable)

Failed merges:

 - rust-lang#130735 (Simple validation for unsize coercion in MIR validation)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 1f52c07 into rust-lang:master Sep 25, 2024
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@rustbot rustbot added this to the 1.83.0 milestone Sep 25, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Sep 25, 2024
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Unrolled build for rust-lang#130752
e4c5d1b 
Rollup merge of rust-lang#130752 - tdittr:cmse-assembly-tests, r=jieyouxu

Improve assembly test for CMSE ABIs

Tracking issues: rust-lang#75835 rust-lang#81391

This ensures the code-gen for these ABIs does not change silently. There is a small chance that this code-gen might change, however even GCC (https://godbolt.org/z/16arxab5x and https://godbolt.org/z/16arxab5x) generates almost the same assembly for these ABIs. I hope the notes in the comments should help fix the tests if it ever breaks.
@tgross35 tgross35 added F-extended_key_value_attributes `#![feature(extended_key_value_attributes)] and removed F-extended_key_value_attributes `#![feature(extended_key_value_attributes)] labels Oct 26, 2024
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A-ABI Area: Concerning the application binary interface (ABI) A-testsuite Area: The testsuite used to check the correctness of rustc F-abi_c_cmse_nonsecure_call `#![feature(abi_c_cmse_nonsecure_call)]` F-cmse_nonsecure_entry `#![feature(cmse_nonsecure_entry)]` S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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