https://github.com/rust-lang/rust http://git.dreamy.place/mirrors/rust/atom?h=1.29.2 2018-07-23T13:42:23+00:00 2018-07-23T13:42:23+00:00 bors bors@rust-lang.org 2018-07-23T13:42:23+00:00 urn:sha1:5665a2d36778693ca19215540a518ccf04eb0b1a rustc: Work around an upstream wasm ThinLTO bug This commit implements a workaround for an [upstream LLVM bug][1] where custom sections were accidentally duplicated amongst codegen units when ThinLTO passes were performed. This is due to the fact that custom sections for wasm are stored as metadata nodes which are automatically imported into modules when ThinLTO happens. The fix here is to forcibly delete the metadata node from imported modules before LLVM has a chance to try to copy it over. [1]: https://bugs.llvm.org/show_bug.cgi?id=38184 2018-07-18T19:12:53+00:00 Alex Crichton alex@alexcrichton.com 2018-07-18T19:12:53+00:00 urn:sha1:e08fcbbd8d241ab68d72dc8b288ca55b8c1114fe This commit implements a workaround for an [upstream LLVM bug][1] where custom sections were accidentally duplicated amongst codegen units when ThinLTO passes were performed. This is due to the fact that custom sections for wasm are stored as metadata nodes which are automatically imported into modules when ThinLTO happens. The fix here is to forcibly delete the metadata node from imported modules before LLVM has a chance to try to copy it over. [1]: https://bugs.llvm.org/show_bug.cgi?id=38184 2018-07-18T18:37:56+00:00 Alex Crichton alex@alexcrichton.com 2018-07-18T18:37:56+00:00 urn:sha1:829bc268a9e3ef4d0f8ec4f6a2fadd604bdc7b8d This commit removes a hack in our ThinLTO passes which removes available externally functions manually. The [upstream bug][1] has long since been fixed, so we should be able to rely on LLVM natively for this now! [1]: https://bugs.llvm.org/show_bug.cgi?id=35736 2018-07-16T06:59:10+00:00 Michael Woerister michaelwoerister@posteo 2018-07-16T06:59:10+00:00 urn:sha1:d992090a702dff976a6d05a9b53b0d7b82199d14 This reverts commit 9df56ca0eea1a8f5af945df25ce23e276b1d48a7. 2018-07-16T06:57:49+00:00 Michael Woerister michaelwoerister@posteo 2018-07-16T06:57:49+00:00 urn:sha1:b822e699c3e811f929fd69046095c1d6eb9abd22 This reverts commit e045a6cd8c0235a26ef11e6cd9a13ebd817f1265. 2018-07-13T10:41:22+00:00 Michael Woerister michaelwoerister@posteo 2018-07-13T10:41:22+00:00 urn:sha1:e045a6cd8c0235a26ef11e6cd9a13ebd817f1265 2018-07-11T15:51:36+00:00 Michael Woerister michaelwoerister@posteo 2018-07-09T13:58:25+00:00 urn:sha1:9df56ca0eea1a8f5af945df25ce23e276b1d48a7 2018-07-10T20:43:01+00:00 Alex Crichton alex@alexcrichton.com 2018-06-01T17:20:00+00:00 urn:sha1:42eb85002ae4bda9899216805d03fa7d77279ede This commit upgrades the main LLVM submodule to LLVM's current master branch. The LLD submodule is updated in tandem as well as compiler-builtins. Along the way support was also added for LLVM 7's new features. This primarily includes the support for custom section concatenation natively in LLD so we now add wasm custom sections in LLVM IR rather than having custom support in rustc itself for doing so. Some other miscellaneous changes are: * We now pass `--gc-sections` to `wasm-ld` * The optimization level is now passed to `wasm-ld` * A `--stack-first` option is passed to LLD to have stack overflow always cause a trap instead of corrupting static data * The wasm target for LLVM switched to `wasm32-unknown-unknown`. * The syntax for aligned pointers has changed in LLVM IR and tests are updated to reflect this. * The `thumbv6m-none-eabi` target is disabled due to an [LLVM bug][llbug] Nowadays we've been mostly only upgrading whenever there's a major release of LLVM but enough changes have been happening on the wasm target that there's been growing motivation for quite some time now to upgrade out version of LLD. To upgrade LLD, however, we need to upgrade LLVM to avoid needing to build yet another version of LLVM on the builders. The revision of LLVM in use here is arbitrarily chosen. We will likely need to continue to update it over time if and when we discover bugs. Once LLVM 7 is fully released we can switch to that channel as well. [llbug]: https://bugs.llvm.org/show_bug.cgi?id=37382 2018-05-17T12:08:30+00:00 Irina Popa irinagpopa@gmail.com 2018-05-08T13:10:16+00:00 urn:sha1:b63d7e2b1c4019e40051036bcb1fd5f254a8f6e2 2018-05-15T19:10:40+00:00 Anthony Ramine n.oxyde@gmail.com 2018-03-29T07:41:41+00:00 urn:sha1:5701779b8e1ad05dc5eb165b4b00188fb43ebbf2 The crash that happened in #23566 doesn't happen anymore with the LLVM mergefunc pass enabled and it hugely reduces code size (for example it shaves off 10% of the final Servo executable). This patch reenables it.