rust/compiler/rustc_llvm, branch try

Rollup merge of #142097 - ZuseZ4:offload-host1, r=oli-obk

2025-07-21T16:54:24+00:00

gpu offload host code generation r? ghost This will generate most of the host side code to use llvm's offload feature. The first PR will only handle automatic mem-transfers to and from the device. So if a user calls a kernel, we will copy inputs back and forth, but we won't do the actual kernel launch. Before merging, we will use LLVM's Info infrastructure to verify that the memcopies match what openmp offloa generates in C++. `LIBOMPTARGET_INFO=-1 ./my_rust_binary` should print that a memcpy to and later from the device is happening. A follow-up PR will generate the actual device-side kernel which will then do computations on the GPU. A third PR will implement manual host2device and device2host functionality, but the goal is to minimize cases where a user has to overwrite our default handling due to performance issues. I'm trying to get a full MVP out first, so this just recognizes GPU functions based on magic names. The final frontend will obviously move this over to use proper macros, like I'm already doing it for the autodiff work. This work will also be compatible with std::autodiff, so one can differentiate GPU kernels. Tracking: - https://github.com/rust-lang/rust/issues/131513

Rollup merge of #144116 - nikic:llvm-21-fixes, r=dianqk

2025-07-20T06:56:08+00:00

Fixes for LLVM 21 This fixes compatibility issues with LLVM 21 without performing the actual upgrade. Split out from https://github.com/rust-lang/rust/pull/143684. This fixes three issues: * Updates the AMDGPU data layout for address space 8. * Makes emit-arity-indicator.rs a no_core test, so it doesn't fail on non-x86 hosts. * Explicitly sets the exception model for wasm, as this is no longer implied by `-wasm-enable-eh`.

Rollup merge of #142444 - KMJ-007:autodiff-codegen-test, r=ZuseZ4

2025-07-19T06:55:34+00:00

adding run-make test to autodiff r? `@ZuseZ4`

add various wrappers for gpu code generation

2025-07-18T23:24:12+00:00

Pass wasm exception model to TargetOptions

2025-07-18T07:35:50+00:00

This is no longer implied by -wasm-enable-eh.

Avoid building C++ for rustc_llvm with --compile-time-deps

2025-07-11T13:32:03+00:00

This saves about 30s.

awhile -> a while where appropriate

2025-07-02T18:17:29+00:00

fix: Fix TypePrintFn flag passing for autodiff codegen

2025-07-02T02:55:21+00:00

Signed-off-by: Karan Janthe

rustc_llvm: add Windows system libs only when cross-compiling from Windows

2025-05-31T13:47:14+00:00

This obviously doesn't work when cross-compiling from Linux. Split out from: https://github.com/rust-lang/rust/pull/140772

Experimental cygwin support in rustc

2025-05-15T15:34:11+00:00

Co-authored-by: Ookiineko