Files
rust/tests/codegen-llvm
Jonathan Brouwer b66ead827c Rollup merge of #152020 - Sa4dUs:offload-remove-dummy-loads, r=ZuseZ4
Remove dummy loads on offload codegen

The current logic generates two dummy loads to prevent some globals from being optimized away. This blocks memtransfer loop hoisting optimizations, so it's time to remove them.

r? @ZuseZ4
2026-02-05 08:32:45 +01:00
..
2025-11-08 10:57:35 -07:00
2026-02-04 15:26:56 +01:00
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