Files
rust/tests/codegen-llvm
Stuart Cook 3d102a7812 Rollup merge of #150893 - ZuseZ4:move-un-register-lib, r=oli-obk
offload: move (un)register lib into global_ctors

Right now we initialize the openmp/offload runtime before every single offload call, and tear it down directly afterwards.
What we should rather do is initialize it once in the binary startup code, and tear it down at the end of the binary execution. Here I implement these changes.

Together, our generated IR has a lot less usage of globals, which in turn simplifies the refactoring in https://github.com/rust-lang/rust/pull/150683, where I introduce a new variant of our offload intrinsic.

r? oli-obk
2026-01-28 19:03:51 +11:00
..
2025-11-08 10:57:35 -07:00
2026-01-27 10:43:21 -08:00
2025-08-15 16:42:21 +00:00

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