Subtree sync for rustc_codegen_cranelift #127162
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Remove `Rvalue::CheckedBinaryOp` Zulip conversation: <https://rust-lang.zulipchat.com/#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/intrinsics.20vs.20binop.2Funop/near/438729996> cc `@RalfJung` While it's a draft, r? ghost
…, r=RalfJung,nikic compiler: add simd_ctpop intrinsic Fairly straightforward addition. cc `@rust-lang/opsem` new (extremely boring) intrinsic
Typical uses of ThinLTO don't have any use for this as a standalone file, but distributed ThinLTO uses this to make the linker phase more efficient. With clang you'd do something like `clang -flto=thin -fthin-link-bitcode=foo.indexing.o -c foo.c` and then get both foo.o (full of bitcode) and foo.indexing.o (just the summary or index part of the bitcode). That's then usable by a two-stage linking process that's more friendly to distributed build systems like bazel, which is why I'm working on this area. I talked some to @teresajohnson about naming in this area, as things seem to be a little confused between various blog posts and build systems. "bitcode index" and "bitcode summary" tend to be a little too ambiguous, and she tends to use "thin link bitcode" and "minimized bitcode" (which matches the descriptions in LLVM). Since the clang option is thin-link-bitcode, I went with that to try and not add a new spelling in the world. Per @dtolnay, you can work around the lack of this by using `lld --thinlto-index-only` to do the indexing on regular .o files of bitcode, but that is a bit wasteful on actions when we already have all the information in rustc and could just write out the matching minimized bitcode. I didn't test that at all in our infrastructure, because by the time I learned that I already had this patch largely written.
The standard library now has the right configs in it's Cargo.toml
rustc_codegen_llvm: add support for writing summary bitcode Typical uses of ThinLTO don't have any use for this as a standalone file, but distributed ThinLTO uses this to make the linker phase more efficient. With clang you'd do something like `clang -flto=thin -fthin-link-bitcode=foo.indexing.o -c foo.c` and then get both foo.o (full of bitcode) and foo.indexing.o (just the summary or index part of the bitcode). That's then usable by a two-stage linking process that's more friendly to distributed build systems like bazel, which is why I'm working on this area. I talked some to `@teresajohnson` about naming in this area, as things seem to be a little confused between various blog posts and build systems. "bitcode index" and "bitcode summary" tend to be a little too ambiguous, and she tends to use "thin link bitcode" and "minimized bitcode" (which matches the descriptions in LLVM). Since the clang option is thin-link-bitcode, I went with that to try and not add a new spelling in the world. Per `@dtolnay,` you can work around the lack of this by using `lld --thinlto-index-only` to do the indexing on regular .o files of bitcode, but that is a bit wasteful on actions when we already have all the information in rustc and could just write out the matching minimized bitcode. I didn't test that at all in our infrastructure, because by the time I learned that I already had this patch largely written.
This replaces the drop_in_place reference with null in vtables. On librustc_driver.so, this drops about ~17k dynamic relocations from the output, since many vtables can now be placed in read-only memory, rather than having a relocated pointer included. This makes a tradeoff by adding a null check at vtable call sites. That's hard to avoid without changing the vtable format (e.g., to use a pc-relative relocation instead of an absolute address, and avoid the dynamic relocation that way). But it seems likely that the check is cheap at runtime.
Add an intrinsic for `ptr::metadata` The follow-up to rust-lang#123840, so we can remove `PtrComponents` and `PtrRepr` from libcore entirely (well, after a bootstrap update). As discussed in <https://rust-lang.zulipchat.com/#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/.60ptr_metadata.60.20in.20MIR/near/435637808>, this introduces `UnOp::PtrMetadata` taking a raw pointer and returning the associated metadata value. By no longer going through a `union`, this should also help future PRs better optimize pointer operations. r? ``@oli-obk``
Show files produced by `--emit foo` in json artifact notifications Right now it is possible to ask `rustc` to save some intermediate representation into one or more files with `--emit=foo`, but figuring out what exactly was produced is difficult. This pull request adds information about `llvm_ir` and `asm` intermediate files into notifications produced by `--json=artifacts`. Related discussion: https://internals.rust-lang.org/t/easier-access-to-files-generated-by-emit-foo/20477 Motivation - `cargo-show-asm` parses those intermediate files and presents them in a user friendly way, but right now I have to apply some dirty hacks. Hacks make behavior confusing: hintron/computer-enhance#35 This pull request introduces a new behavior: now `rustc` will emit a new artifact notification for every artifact type user asked to `--emit`, for example for `--emit asm` those will include all the `.s` files. Most users won't notice this behavior, to be affected by it all of the following must hold: - user must use `rustc` binary directly (when `cargo` invokes `rustc` - it consumes artifact notifications and doesn't emit anything) - user must specify both `--emit xxx` and `--json artifacts` - user must refuse to handle unknown artifact types - user must disable incremental compilation (or deal with it better than cargo does, or use a workaround like `save-temps`) in order not to hit rust-lang#88829 / rust-lang#89149
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@bors r+ subtree sync |
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@bors p=1 |
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…bjorn3 Subtree sync for rustc_codegen_cranelift The main highlight this time is support for arm64 macOS in cg_clif. A future PR will enable distributing it as rustup component. r? `@ghost` `@rustbot` label +A-codegen +A-cranelift +T-compiler
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#126018 (Remove the `box_pointers` lint.) - rust-lang#126895 (Fix simd_gather documentation) - rust-lang#126981 (Replace some magic booleans in match-lowering with enums) - rust-lang#127069 (small correction to fmt::Pointer impl) - rust-lang#127157 (coverage: Avoid getting extra unexpansion info when we don't need it) - rust-lang#127160 (Add a regression test for rust-lang#123630) - rust-lang#127161 (Improve `run-make-support` library `args` API) - rust-lang#127162 (Subtree sync for rustc_codegen_cranelift) r? `@ghost` `@rustbot` modify labels: rollup
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Distribute rustc_codegen_cranelift for arm64 macOS Support for arm64 macOS has been added to rustc_codegen_cranelift recently. Based on rust-lang#127162 try-job: dist-aarch64-apple
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☀️ Test successful - checks-actions |
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Distribute rustc_codegen_cranelift for arm64 macOS Support for arm64 macOS has been added to rustc_codegen_cranelift recently. Based on rust-lang#127162 try-job: dist-aarch64-apple
This was referenced Jun 30, 2024
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Finished benchmarking commit (ef3d6fd): comparison URL. Overall result: ✅ improvements - no action needed@rustbot label: -perf-regression Instruction countThis is a highly reliable metric that was used to determine the overall result at the top of this comment.
Max RSS (memory usage)This benchmark run did not return any relevant results for this metric. CyclesResults (secondary -2.0%)This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.
Binary sizeThis benchmark run did not return any relevant results for this metric. Bootstrap: 696.099s -> 697.442s (0.19%) |
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The main highlight this time is support for arm64 macOS in cg_clif. A future PR will enable distributing it as rustup component.
r? @ghost
@rustbot label +A-codegen +A-cranelift +T-compiler