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Diffstat (limited to 'src/test/codegen/README.md')
| -rw-r--r-- | src/test/codegen/README.md | 24 |
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diff --git a/src/test/codegen/README.md b/src/test/codegen/README.md deleted file mode 100644 index 8f2daaafc..000000000 --- a/src/test/codegen/README.md +++ /dev/null @@ -1,24 +0,0 @@ -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: - -```rust -// 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: - -```rust -// 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 -``` |