Files
rust/tests/run-make
Matthias Krüger 3e412faa66 Rollup merge of #149994 - Flakebi:amdgpu-vectors, r=jieyouxu
Allow vector types for amdgpu

The amdgpu target uses vector types in various places. The vector types can be used on all architectures, there is no associated target feature that needs to be enabled.

The largest vector type found in LLVM intrinsics is `v32i32` (`[32 x i32]`) for mfma intrinsics. Note that while this intrinsic is only supported on some architectures, the vector type itself is supported on all architectures.

Tracking issue: rust-lang/rust#135024

(I used an empty string to say “does not need a target feature”. If you prefer an `Option` or something like that, I’ll change it.)
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The run-make test suite

The run-make test suite contains tests which are the most flexible out of all the rust-lang/rust test suites. run-make tests can basically contain arbitrary code, and are supported by the run_make_support library.

Infrastructure

A run-make test is a test recipe source file rmake.rs accompanied by its parent directory (e.g. tests/run-make/foo/rmake.rs is the foo run-make test).

The implementation for collecting and building the rmake.rs recipes are in src/tools/compiletest/src/runtest.rs, in run_rmake_test.

The setup for the rmake.rs can be summarized as a 3-stage process:

  1. First, we build the run_make_support library in bootstrap as a tool lib.

  2. Then, we compile the rmake.rs "recipe" linking the support library and its dependencies in, and provide a bunch of env vars. We setup a directory structure within build/<target>/test/run-make/

    <test-name>/
        rmake.exe              # recipe binary
        rmake_out/             # sources from test sources copied over
    

    and copy non-rmake.rs input support files over to rmake_out/. The support library is made available as an extern prelude.

  3. Finally, we run the recipe binary and set rmake_out/ as the working directory.