| Age | Commit message (Collapse) | Author | Lines |
|---|
|
Allow for opting out of ThinLTO and clean up LTO related cli flag handling.
It turns out that there currently is no way to explicitly disable ThinLTO (except for the nightly-only `-Zthinlto` flag). This PR extends `-C lto` to take `yes` and `no` in addition to `thin` and `fat`. It should be backwards compatible.
It also cleans up how LTO mode selection is handled.
Note that merging the PR in the current state would make the new values for `-C lto` available on the stable channel. I think that would be fine but maybe some team should vote on it.
|
|
r=alexcrichton
ThinLTO: Don't keep files open after mmaping them.
Fixes #53947.
r? @alexcrichton
|
|
rustc: Prepare the `atomics` feature for wasm
This commit adds a few changes for atomic instructions on the
`wasm32-unknown-unknown` target. Atomic instructions are not yet stable in
WebAssembly itself but there are multiple implementations and LLVM has support
for the proposed instruction set, so let's work on exposing it!
Here there are a few inclusions:
* The `atomics` feature was whitelisted for LLVM, allowing code in Rust to
enable/disable/gate on this.
* The `singlethread` option is turned off for wasm when the `atomics` feature is
enabled. This means that by default wasm won't be lowering with atomics, but
when atomics are enabled globally we'll turn off single-threaded mode to
actually codegen atomics. This probably isn't what we'll want in the long term
but for now it should work.
* Finally the maximum atomic width is increased to 64 to reflect the current
wasm spec.
|
|
|
|
|
|
|
|
This commit adds a few changes for atomic instructions on the
`wasm32-unknown-unknown` target. Atomic instructions are not yet stable in
WebAssembly itself but there are multiple implementations and LLVM has support
for the proposed instruction set, so let's work on exposing it!
Here there are a few inclusions:
* The `atomics` feature was whitelisted for LLVM, allowing code in Rust to
enable/disable/gate on this.
* The `singlethread` option is turned off for wasm when the `atomics` feature is
enabled. This means that by default wasm won't be lowering with atomics, but
when atomics are enabled globally we'll turn off single-threaded mode to
actually codegen atomics. This probably isn't what we'll want in the long term
but for now it should work.
* Finally the maximum atomic width is increased to 64 to reflect the current
wasm spec.
|
|
incrementally.
|
|
|
|
|
|
Use FxHash{Map,Set} instead of the default Hash{Map,Set} everywhere in rustc.
Most of the compiler uses the `Fx` hasher but some places ended up with the default one.
|
|
This fixes a regression from #53031 where specifying `-C target-cpu=native` is
printing a lot of warnings from LLVM about `native` being an unknown CPU. It
turns out that `native` is indeed an unknown CPU and we have to perform a
mapping to an actual CPU name, but this mapping is only performed in one
location rather than all locations we inform LLVM about the target CPU.
This commit centralizes the mapping of `native` to LLVM's value of the native
CPU, ensuring that all locations we inform LLVM about the `target-cpu` it's
never `native`.
Closes #53322
|
|
|
|
|
|
|
|
|
|
Fix typos found by codespell.
|
|
Remove LinkMeta struct
Fixes #53291
|
|
try to infer linker flavor from linker name and vice versa
This is a second take on PR #50359 that implements the logic proposed in https://github.com/rust-lang/rust/pull/50359#pullrequestreview-116663121
With this change it would become possible to link `thumb*` binaries using GNU's LD on stable as `-C linker=arm-none-eabi-ld` would be enough to change both the linker and the linker flavor from their default values of `arm-none-eabi-gcc` and `gcc`.
To link `thumb*` binaries using rustc's LLD on stable `-Z linker-flavor` would need to be stabilized as `-C linker=rust-lld -Z linker-flavor=ld.lld` are both required to change the linker and the linker flavor, but this PR doesn't propose that. We would probably need some sort of stability guarantee around `rust-lld`'s name and availability to make linking with rustc's LLD truly stable.
With this change it would also be possible to link `thumb*` binaries using a system installed LLD on stable using the `-C linker=ld.lld` flag (provided that `ld.lld` is a symlink to the system installed LLD).
r? @alexcrichton
|
|
|
|
|
|
|
|
|
|
|
|
|
|
this field defaults to the LD / GNU flavor
|
|
|
|
Preliminary work for incremental ThinLTO (CGU name edition)
Bring back the first half of #52266 but hopefully without the performance regression.
|
|
Originally added in #52887 this commit disables passing `--strip-debug` to LLD
when optimized. This bring back the original bug of emitting broken debuginfo
but currently it *also* strips the `name` section which makes it very difficult
to inspect the final binary. A real fix is happening at
https://reviews.llvm.org/D50729 and we can reevaluate once we've updated LLD to
have that commit.
|
|
Export WASM table by default
This allows loading a rust-generated `.wasm` binary in a host and using the exported table much like the `memory` export.
|
|
|
|
Make LLVM emit assembly comments with -Z asm-comments
Fixes #35741, and makes `-Z asm-comments` actually do something useful.
Before:
```
.section .text.main,"ax",@progbits
.globl main
.p2align 4, 0x90
.type main,@function
main:
.cfi_startproc
pushq %rax
.cfi_def_cfa_offset 16
movslq %edi, %rax
leaq _ZN1t4main17he95a7d4f1843730eE(%rip), %rdi
movq %rsi, (%rsp)
movq %rax, %rsi
movq (%rsp), %rdx
callq _ZN3std2rt10lang_start17h3121da83b2bc3697E
movl %eax, %ecx
movl %ecx, %eax
popq %rcx
.cfi_def_cfa_offset 8
retq
.Lfunc_end8:
.size main, .Lfunc_end8-main
.cfi_endproc
```
After:
```
.section .text.main,"ax",@progbits
.globl main # -- Begin function main
.p2align 4, 0x90
.type main,@function
main: # @main
.cfi_startproc
# %bb.0:
pushq %rax
.cfi_def_cfa_offset 16
movslq %edi, %rax
leaq _ZN1t4main17he95a7d4f1843730eE(%rip), %rdi
movq %rsi, (%rsp) # 8-byte Spill
movq %rax, %rsi
movq (%rsp), %rdx # 8-byte Reload
callq _ZN3std2rt10lang_start17h3121da83b2bc3697E
movl %eax, %ecx
movl %ecx, %eax
popq %rcx
.cfi_def_cfa_offset 8
retq
.Lfunc_end8:
.size main, .Lfunc_end8-main
.cfi_endproc
# -- End function
```
|
|
Fixes #35741.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
with ThinLTO and cross-lang-lto.
Normally, when compiling with whole-crate-graph ThinLTO, we expect
rustc's LTO step to "uplift" upstream object files/LLVM modules to
the current set of compilation artifacts. Therefore the staticlib
creation code skips this uplifting. However, when compiling with
"cross-language LTO" (i.e. defer LTO to the actual linker), the LTO
step in rustc is not performed, so we have to take care of copying
upstream object files during archive creation (like we already do
when compiling without any LTO).
|
|
|
|
Make globals with private linkage unnamed. Fixes #50862.
cc @oli-obk @nagisa
|
|
|
|
|
|
|
|
This is a clippy-breaking change.
|
|
Disable debug sections when optimization flags is set for LLD.
Currently LLD does not error when optimization is set and debugging information sections are present. (See discussion at https://reviews.llvm.org/D47901)
Using `--strip-debug` along with the `-O` option.
|
