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&& operator chains (and ||, possibly) generates unoptimizable LLVM IR

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#83623 In rust-lang/rust;

· AngelicosPhosphoros opened on Mar 28, 2021

Imprecise floating point operations (fast-math)

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

A-floating-pointArea: Floating point numbers and arithmeticArea: Floating point numbers and arithmetic

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

C-feature-requestCategory: A feature request, i.e: not implemented / a PR.Category: A feature request, i.e: not implemented / a PR.

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-langRelevant to the language team, which will review and decide on the PR/issue.Relevant to the language team, which will review and decide on the PR/issue.

Status: Open.

#21690 In rust-lang/rust;

· mpdn opened on Jan 27, 2015

Add support for branch coverage in source-based coverage

A-code-coverageArea: Source-based code coverage (-Cinstrument-coverage)Area: Source-based code coverage (-Cinstrument-coverage)

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

Status: Open.

#79649 In rust-lang/rust;

· marco-c opened on Dec 2, 2020

support default impl for specialization

A-specializationArea: Trait impl specializationArea: Trait impl specialization

A-trait-systemArea: Trait systemArea: Trait system

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

E-mediumCall for participation: Medium difficulty. Experience needed to fix: Intermediate.Call for participation: Medium difficulty. Experience needed to fix: Intermediate.

F-specialization`#![feature(specialization)]``#![feature(specialization)]`

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#37653 In rust-lang/rust;

· nikomatsakis opened on Nov 8, 2016

E0495 Does not mention the conflicting requirements

A-diagnosticsArea: Messages for errors, warnings, and lintsArea: Messages for errors, warnings, and lints

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#37768 In rust-lang/rust;

· gnzlbg opened on Nov 14, 2016

🔬 implement "always applicable impls"

A-specializationArea: Trait impl specializationArea: Trait impl specialization

A-trait-systemArea: Trait systemArea: Trait system

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

F-specialization`#![feature(specialization)]``#![feature(specialization)]`

S-types-deferredStatus: Identified as a valid potential future enhancement that is not currently being worked onStatus: Identified as a valid potential future enhancement that is not currently being worked on

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

T-typesRelevant to the types team, which will review and decide on the PR/issue.Relevant to the types team, which will review and decide on the PR/issue.

Status: Open.

#48538 In rust-lang/rust;

· nikomatsakis opened on Feb 25, 2018

cargo doc should render crate examples and link to them on main documentation page

A-rustdoc-scrape-examplesArea: The (unstable) rustdoc scrape-examples feature described in RFC 3123Area: The (unstable) rustdoc scrape-examples feature described in RFC 3123

A-rustdoc-uiArea: Rustdoc UI (generated HTML)Area: Rustdoc UI (generated HTML)

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

T-rustdocRelevant to the rustdoc team, which will review and decide on the PR/issue.Relevant to the rustdoc team, which will review and decide on the PR/issue.

T-rustdoc-frontendRelevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.Relevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.

Status: Open.

#133348 In rust-lang/rust;

· burtonageo opened on Jun 1, 2016

Many From implementations are undocumented

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

E-mentorCall for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion.Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion.

P-mediumMedium priorityMedium priority

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#51430 In rust-lang/rust;

· skade opened on Jun 8, 2018

[impl Trait] Should we allow impl Trait after -> in fn types or parentheses sugar?

A-impl-traitArea: `impl Trait`. Universally / existentially quantified anonymous types with static dispatch.Area: `impl Trait`. Universally / existentially quantified anonymous types with static dispatch.

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

T-langRelevant to the language team, which will review and decide on the PR/issue.Relevant to the language team, which will review and decide on the PR/issue.

Status: Open.

#45994 In rust-lang/rust;

· nikomatsakis opened on Nov 15, 2017

macOS packages and Windows MSIs are not signed

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

O-macosOperating system: macOSOperating system: macOS

O-windowsOperating system: WindowsOperating system: Windows

P-mediumMedium priorityMedium priority

T-infraRelevant to the infrastructure team, which will review and decide on the PR/issue.Relevant to the infrastructure team, which will review and decide on the PR/issue.

Status: Open.

#27694 In rust-lang/rust;

· skade opened on Aug 12, 2015

Consider aggressively avoiding generating memcpys for moves if we can avoid it

A-codegenArea: Code generationArea: Code generation

A-mir-optArea: MIR optimizationsArea: MIR optimizations

A-mir-opt-nrvoFixed by the Named Return Value Opt. (NRVO)Fixed by the Named Return Value Opt. (NRVO)

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#13707 In rust-lang/rust;

· pcwalton opened on Apr 23, 2014

replace the implementation of inline functions

A-codegenArea: Code generationArea: Code generation

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

I-compiletimeIssue: Problems and improvements with respect to compile times.Issue: Problems and improvements with respect to compile times.

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#14527 In rust-lang/rust;

· thestinger opened on May 29, 2014