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[LifetimeSafety] Investigate +161% compile time hit for AST/ByteCode/Interp.cpp

clang:bytecodeIssues for the clang bytecode constexpr interpreterIssues for the clang bytecode constexpr interpreter

clang:temporal-safetyIssue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)Issue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)

slow-compile

Status: Open.

Bug

#164625 In llvm/llvm-project;

· usx95 opened on Oct 22, 2025

Clang taking a long time when compiling with O2 O3 optimisation levels

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

slow-compile

Status: Open.

#161977 In llvm/llvm-project;

· ArashPartow opened on Oct 4, 2025

Lifetime safety can timeout on cyclic substitution in a loop

clang:temporal-safetyIssue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)Issue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)

slow-compile

Status: Open.

Bug

#161333 In llvm/llvm-project;

· usx95 opened on Sep 30, 2025

_BitInt division with -Oz produces much larger code than -O0, and compiles slow

llvm:codesizeCode size issuesCode size issues

llvm:optimizations

slow-compile

Status: Open.

#156251 In llvm/llvm-project;

· neldredge opened on Aug 31, 2025

[PowerPC] compiling this file takes hours

llvm:optimizations

slow-compile

Status: Open.

#156022 In llvm/llvm-project;

· pkubaj opened on Aug 29, 2025

Bailout lifetime analysis on large CFGs

clang:analysis

clang:temporal-safetyIssue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)Issue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)

slow-compile

Status: Open.

Task

#154508 In llvm/llvm-project;

· usx95 opened on Aug 20, 2025

Benchmark compile-time hit due to lifetime analysis

clang:temporal-safetyIssue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)Issue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)

slow-compile

Status: Open.

Task

#154507 In llvm/llvm-project;

· usx95 opened on Aug 20, 2025

Harden lifetime analysis (workstream 3)

clang:analysis

clang:temporal-safetyIssue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)Issue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)

metaissueIssue to collect references to a group of similar or related issues.Issue to collect references to a group of similar or related issues.

slow-compile

Status: Open.

#154506 In llvm/llvm-project;

· usx95 opened on Aug 20, 2025

Quadratic compile times with pack indexing that can be avoided

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

slow-compile

Status: Open.

#153431 In llvm/llvm-project;

· ilya-biryukov opened on Aug 13, 2025

[flang] Long compile time with large array constructor

flang:frontend

slow-compile

Status: Open.

Bug

#153197 In llvm/llvm-project;

· DanielCChen opened on Aug 12, 2025

[HLSL] Very slow compilation time if a large array is used in a semantic

HLSLHLSL Language SupportHLSL Language Support

slow-compile

Status: Open.

Bug

#152307 In llvm/llvm-project;

· Keenuts opened on Aug 6, 2025

[LoopStrengthReduce] Mitigation of issues introduced by compilation time optimization in SolveRecurse.

backend:AArch64

backend:AMDGPU

backend:ARM

backend:NVPTX

backend:PowerPC

backend:RISC-V

backend:WebAssembly

backend:X86

llvm:transforms

slow-compile

Status: Open (in progress).

llvm/llvm-projectnumber 147588

#147588 In llvm/llvm-project;

· SergeyShch01 opened on Jul 8, 2025