Files
rust/tests/codegen-llvm
Stuart Cook 7b0236fbd8 Rollup merge of #147200 - ZuseZ4:fix-autodiff-emptry-ret, r=Zalathar
Fix autodiff empty ret regression

closes https://github.com/rust-lang/rust/issues/147144

The two gsoc summer projects caused a bit of churn, which was to be expected, especially since we don't run autodiff in CI yet.
This adds a void return testcase that we should have had anyway, and fixes the regression.

r? `@Zalathar` (Just guessing since I've seen you in a few LLVM PRs and Oli is probably still busy. Feel free to reroll!)
2025-10-01 22:15:01 +10:00
..
2025-08-15 16:42:21 +00:00
2025-08-20 16:35:33 +02:00

The files here use the LLVM FileCheck framework, documented at https://llvm.org/docs/CommandGuide/FileCheck.html.

One extension worth noting is the use of revisions as custom prefixes for FileCheck. If your codegen test has different behavior based on the chosen target or different compiler flags that you want to exercise, you can use a revisions annotation, like so:

// revisions: aaa bbb
// [bbb] compile-flags: --flags-for-bbb

After specifying those variations, you can write different expected, or explicitly unexpected output by using <prefix>-SAME: and <prefix>-NOT:, like so:

// CHECK: expected code
// aaa-SAME: emitted-only-for-aaa
// aaa-NOT:                        emitted-only-for-bbb
// bbb-NOT:  emitted-only-for-aaa
// bbb-SAME:                       emitted-only-for-bbb