Files
rust/tests/codegen-llvm
Matthias Krüger 9dffb21112 Rollup merge of #150065 - is57primenumber:add-slice-cse-test, r=Mark-Simulacrum
add CSE optimization tests for iterating over slice

This PR is regression test for issue rust-lang/rust#119573.
This PR introduces a new regression test to verify a critical optimization known as Common Subexpression Elimination (CSE) is correctly applied during various slice iteration patterns.
2026-01-25 07:42:59 +01:00
..
2025-11-08 10:57:35 -07:00
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